HP Elitedesk 800 G4 Small Form Factor PC


Maintenance and Service Guide

HP EliteDesk 800 G4 SFF Business PC

© Copyright 2018 HP Development Company, L.P.

AMD is a trademark of Advanced Micro Devices, Inc. Bluetooth is a trademark owned by its proprietor and used by HP Inc. under license. Intel, Celeron, and Pentium are trademarks of Intel Corporation in the U.S. and other countries. Microsoft and Windows are trademarks of the Microsoft group of companies.

The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

First Edition: May 2018 Document Part Number: L17285-001

######### Product notice

This guide describes features that are common to most models. Some features may not be available on your product. To access the latest user guide, go to http://www.hp.com/support, and follow the instructions to find your product. Then select User Guides.

######### Software terms

By installing, copying, downloading, or otherwise using any software product preinstalled on this computer, you agree to be bound by the terms of the HP End User License Agreement (EULA). If you do not accept these license terms, your sole remedy is to return the entire unused product (hardware and software) within 14 days for a full refund subject to the refund policy of your seller.

For any further information or to request a full refund of the price of the computer, please contact your seller.

#### Safety warning notice

WARNING! To reduce the possibility of heat-related injuries or of overheating the device, do not place the device directly on your lap or obstruct the device air vents. Use the device only on a hard, flat surface. Do not allow another hard surface, such as an adjoining optional printer, or a soft surface, such as pillows or rugs or clothing, to block airflow. Also, do not allow the AC adapter to contact the skin or a soft surface, such as pillows or rugs or clothing, during operation. The device and the AC adapter comply with the user-accessible surface temperature limits defined by the International Standard for Safety of Information Technology Equipment (IEC 60950-1).

iii

####### iv Safety warning notice

Table of contents

Generating static ................................................................................................................................. 9 Preventing electrostatic damage to equipment ............................................................................... 10 Personal grounding methods and equipment .................................................................................. 10 Grounding the work area ................................................................................................................... 10 Recommended materials and equipment ........................................................................................ 11

Operating guidelines ........................................................................................................................................... 11 Routine care ......................................................................................................................................................... 12

General cleaning safety precautions ................................................................................................ 12 Cleaning the computer case .............................................................................................................. 12 Cleaning the keyboard ....................................................................................................................... 12 Cleaning the monitor ......................................................................................................................... 13 Cleaning the mouse ........................................................................................................................... 13

Service considerations ......................................................................................................................................... 13 Power supply fan ............................................................................................................................... 13 Tools and software requirements ..................................................................................................... 13 Screws ............................................................................................................................................... 13 Cables and connectors ...................................................................................................................... 14 Hard Drives ........................................................................................................................................ 14 Lithium coin cell battery .................................................................................................................... 14

SATA hard drives .................................................................................................................................................. 15 SATA data cable .................................................................................................................................................... 15 SMART ATA drives ................................................................................................................................................ 15 Cable management .............................................................................................................................................. 16

v

Populating DIMM sockets .................................................................................................................. 23 Removing and installing DIMMs ........................................................................................................ 24

Expansion card ..................................................................................................................................................... 26 Drives ................................................................................................................................................................... 30

Drive positions ................................................................................................................................... 30 Removing and installing drives ......................................................................................................... 30

Removing a 9.5 mm slim optical drive ........................................................................... 31 Installing a 9.5 mm slim optical drive ............................................................................ 33 Removing a 3.5-inch hard drive ...................................................................................... 34 Installing a 3.5-inch hard drive ....................................................................................... 36 Drive cage ........................................................................................................................ 40 Removing a 2.5-inch hard drive ...................................................................................... 41 Installing a 2.5-inch hard drive ....................................................................................... 42 Removing and installing an M.2 SSD storage card ......................................................... 44

WLAN module ...................................................................................................................................................... 46 Hood lock ............................................................................................................................................................. 47 Card reader ........................................................................................................................................................... 48 Antennas .............................................................................................................................................................. 49 Air duct ................................................................................................................................................................. 51 Option board ........................................................................................................................................................ 52 Optional rear port ................................................................................................................................................ 53 Fan sink ................................................................................................................................................................ 54 Fan ........................................................................................................................................................................ 57 Processor ............................................................................................................................................................. 58 Power supply ....................................................................................................................................................... 59 Speaker ................................................................................................................................................................ 60 System board ....................................................................................................................................................... 61

System board callouts ....................................................................................................................... 64 Changing from desktop to tower orientation ..................................................................................................... 65

Using Computer Setup (F10) Utilities ................................................................................................ 66

vi

Computer Setup–Main ....................................................................................................................... 68 Computer Setup—Security ............................................................................................................... 70 Computer Setup—Advanced ............................................................................................................. 73 Computer Setup—UEFI Drivers ......................................................................................................... 78

Recovering the Configuration Settings ............................................................................................................... 78

Downloading HP PC Hardware Diagnostics Windows ..................................................................... 117 Downloading the latest HP PC Hardware Diagnostics Windows version ..................... 118

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Downloading HP Hardware Diagnostics Windows by product name or number (select products only) ................................................................................................... 118

Installing HP PC Hardware Diagnostics Windows ........................................................................... 118

Using HP PC Hardware Diagnostics UEFI ........................................................................................................... 118 Starting HP PC Hardware Diagnostics UEFI .................................................................................... 119 Downloading HP PC Hardware Diagnostics UEFI to a USB flash drive ............................................ 119

Downloading the latest HP PC Hardware Diagnostics UEFI version ............................ 119 Downloading HP PC Hardware Diagnostics UEFI by product name or number (select products only) ................................................................................................... 119

Using Remote HP PC Hardware Diagnostics UEFI settings (select products only) ........................................... 120

Downloading Remote HP PC Hardware Diagnostics UEFI ............................................................... 120 Downloading the latest Remote HP PC Hardware Diagnostics UEFI version ............... 120 Downloading Remote HP PC Hardware Diagnostics UEFI by product name or number .......................................................................................................................... 120

Customizing Remote HP PC Hardware Diagnostics UEFI settings .................................................. 120

Index ........................................................................................................................................................... 134

viii

1 Product features

Standard configuration features

Features may vary depending on the model. For support assistance and to learn more about the hardware and software installed on your computer model, run the HP Support Assistant utility.

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NOTE: This computer model can be used in a tower orientation or a desktop orientation.


Standard configuration features 1

Front panel components

Drive configuration may vary by model. Some models have a bezel blank covering the slim optical drive bay.


Front panel components

NOTE: The light on the power button is normally white when the power is on. If it is flashing red, there is a problem with the computer and it is displaying a diagnostic code. Refer to Interpreting system validation diagnostic front panel LEDs and audible codes on page 112 to interpret the code.

2 Chapter 1 Product features

Rear panel components


######### Rear panel components









NOTE: Your model may have additional optional ports available from HP.

When a graphics card is installed in one of the system board slots, the video connectors on the graphics card and/or the integrated graphics on the system board may be used. The specific graphics card installed and software configuration will determine the behavior.

The system board graphics can be disabled by changing settings in BIOS F10 Setup.

Serial number location

Each computer has a unique serial number and a product ID number that are located on the exterior of the computer. Keep these numbers available for use when contacting customer service for assistance.


Rear panel components 3

2 Illustrated parts catalog

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NOTE: HP continually improves and changes product parts. For complete and current information on supported parts for your computer, go to http://partsurfer.hp.com, select your country or region, and then follow the on-screen instructions.

Computer major components


Item Description

USB-C option board HDMI option board DisplayPort option board Thunderbolt 3 option board (uses PCIe slot; not illustrated))

Computer major components 5

Intel Pentium G5500 processor Intel Pentium G5400 processor Intel Celeron G4900 processor

Miscellaneous parts

Description HP USB-Type C to USB Type-A Hub SATA drive power cable DisplayPort cable DVI monitor cable Adapters DisplayPort to VGA DisplayPort to DVI DisplayPort to HDMI 2.0 USB Type-C to USB 3.0 USB to serial port Keyboard Washable, PVC, USB/PS2 Grey, USB Smart card, CCID, USB

Miscellaneous parts 7

Description Smart card, slim, CCID, USB USB Conferencing, USB Slim, PS/2 USB, slim Wireless keyboard and mouse Slim, PCR, USB (Brazil and Latin America) Anti-microbial, slim Grey, slim, USB Collaboration, USB Collaboration, wireless Wireless, premium Premium, USB Health care, wired, USB Premium, wireless, keyboard and mouse Mouse PS/2, optical USB, optical USB, laser USB, premium USB, antimicrobial USB/PS2, washable USB, hardened USB, grey USB, heath care, wired Power cord

3 Routine care, SATA drive guidelines, and disassembly preparation

This chapter provides general service information for the computer. Adherence to the procedures and precautions described in this chapter is essential for proper service.

CAUTION: When the computer is plugged into an AC power source, voltage is always applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

Electrostatic discharge information

A sudden discharge of static electricity from your finger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not appear to be affected at all and can work perfectly throughout a normal cycle. The device may function normally for a while, but it has been degraded in the internal layers, reducing its life expectancy.

Networks built into many integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions.

#### Generating static

The following table shows that:

Relative Humidity Event 55% 40% 10% Walking across carpet Walking across vinyl floor Motions of bench worker Removing DIPs from plastic tube

7,500 V 3,000 V 400 V 400 V

15,000 V 5,000 V 800 V 700 V

35,000 V 12,000 V 6,000 V 2,000 V

Removing DIPs from vinyl tray Removing DIPs from Styrofoam Removing bubble pack from PCB Packing PCBs in foam-lined box

These are then multi-packaged inside plastic tubes, trays, or Styrofoam.

11,500 V 14,500 V 26,500 V 21,000 V

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NOTE: 700 volts can degrade a product.

Electrostatic discharge information 9

#### Preventing electrostatic damage to equipment

Many electronic components are sensitive to ESD. Circuitry design and structure determine the degree of sensitivity. The following packaging and grounding precautions are necessary to prevent damage to electric components and accessories.

#### Personal grounding methods and equipment

Use the following equipment to prevent static electricity damage to equipment:

Static Shielding Protection Levels Method Voltage

Antistatic plastic Carbon-loaded plastic Metallized laminate

1,500 7,500 15,000

#### Grounding the work area

To prevent static damage at the work area, use the following precautions:

#### Recommended materials and equipment

Materials and equipment that are recommended for use in preventing static electricity include:

Operating guidelines

To prevent overheating and to help prolong the life of the computer:

Operating guidelines 11

Routine care

#### General cleaning safety precautions

Cleaning the computer case Follow all safety precautions in General cleaning safety precautions on page 12 before cleaning the computer. To clean the computer case, follow the procedures described below:

Cleaning the keyboard Follow all safety precautions in General cleaning safety precautions on page 12 before cleaning the keyboard. To clean the tops of the keys or the keyboard body, follow the procedures described in Cleaning the computer case on page 12.

When cleaning debris from under the keys, review all rules in General cleaning safety precautions on page 12 before following these procedures:

CAUTION: Use safety glasses equipped with side shields before attempting to clean debris from under the keys.

CAUTION: Never remove a wide leveled key (like the space bar) from the keyboard. If these keys are improperly removed or installed, the keyboard may not function properly.

#### Cleaning the monitor

#### Cleaning the mouse

Before cleaning the mouse, ensure that the power to the computer is turned off.

Service considerations

Listed below are some of the considerations that you should keep in mind during the disassembly and assembly of the computer.

Power supply fan The power supply fan is a variable-speed fan based on the temperature in the power supply. CAUTION: The cooling fan is always on when the computer is in the “On” mode. The cooling fan is off when the computer is in “Standby,” “Suspend,” or “Off” modes. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

#### Tools and software requirements

To service the computer, you need the following:

#### Screws

The screws used in the computer are not interchangeable. They may have standard or metric threads and may be of different lengths. If an incorrect screw is used during the reassembly process, it can damage the unit. HP

Service considerations 13

strongly recommends that all screws removed during disassembly be kept with the part that was removed, then returned to their proper locations.

CAUTION: Metric screws have a black finish. U.S. screws have a silver finish and are used on hard drives only. CAUTION: As each subassembly is removed from the computer, it should be placed away from the work area to prevent damage.

#### Cables and connectors

Most cables used throughout the unit are flat, flexible cables. These cables must be handled with care to avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from the connector. Handle cables by the connector whenever possible. In all cases, avoid bending or twisting the cables, and ensure that the cables are routed in such a way that they cannot be caught or snagged by parts being removed or replaced.

CAUTION: When servicing this computer, ensure that cables are placed in their proper location during the reassembly process. Improper cable placement can damage the computer.

#### Hard Drives

Handle hard drives as delicate, precision components, avoiding all physical shock and vibration. This applies to failed drives as well as replacement spares.

#### Lithium coin cell battery

The battery that comes with the computer provides power to the real-time clock and has a minimum lifetime of about three years.

See the appropriate removal and replacement chapter for the chassis you are working on in this guide for instructions on the replacement procedures.

WARNING! This computer contains a lithium battery. There is a risk of fire and chemical burn if the battery is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or fire, or expose it to temperatures higher than 140ºF (60ºC). Do not attempt to recharge the battery.

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NOTE: Batteries, battery packs, and accumulators should not be disposed of together with the general household waste. In order to forward them to recycling or proper disposal, please use the public collection system or return them to HP, their authorized partners, or their agents.

SATA hard drives

Serial ATA Hard Drive Characteristics Number of pins/conductors in data cable 7/7 Number of pins in power cable 15 Maximum data cable length 39.37 in (100 cm) Data interface voltage differential 400-700 mV Drive voltages 3.3 V, 5 V, 12 V Jumpers for configuring drive N/A Data transfer rate 6.0 Gb/s

SATA data cable

Always use an HP approved SATA 6.0 Gb/s cable as it is fully backwards compatible with the SATA 1.5 Gb/s drives.

Current HP desktop products ship with SATA 6.0 Gb/s hard drives. SATA data cables are susceptible to damage if overflexed. Never crease a SATA data cable and never bend it tighter than a 30 mm (1.18 in) radius. The SATA data cable is a thin, 7-pin cable designed to transmit data for only a single drive.

SMART ATA drives

The Self Monitoring Analysis and Recording Technology (SMART) ATA drives for the HP Personal Computers have built-in drive failure prediction that warns the user or network administrator of an impending failure or crash of the hard drive. The SMART drive tracks fault prediction and failure indication parameters such as reallocated sector count, spin retry count, and calibration retry count. If the drive determines that a failure is imminent, it generates a fault alert.

SATA hard drives 15

Cable management

Always follow good cable management practices when working inside the computer.

4 Removal and replacement procedures

Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components operate properly.

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NOTE: Not all features listed in this guide are available on all computers.

Preparation for disassembly

See Routine care, SATA drive guidelines, and disassembly preparation on page 9 for initial safety procedures.

IMPORTANT: Regardless of the power-on state, voltage is always present on the system board as long as the system is plugged into an active AC outlet. To prevent damage to internal components, you must disconnect the power cord from the power source before opening the computer.

NOTE: During disassembly, label each cable as you remove it, noting its position and routing. Keep all screws with the units removed.

CAUTION: The screws used in the computer are of different thread sizes and lengths; using the wrong screw in an application may damage the unit.

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Preparation for disassembly 17

Access panel


To install the access panel, reverse the removal procedure.

Front bezel


To install the front bezel, reverse the removal procedure.

Front bezel 19

Slim optical drive bezel blank

On some models, there is a bezel blank covering the slim optical drive bay. Remove the bezel blank before installing an optical drive. To remove the bezel blank:


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NOTE: After removing the slim optical drive bezel blank and installing a slim optical drive, you can install an optional bezel trim piece (available from HP) that surrounds the front of the slim optical drive.

Front bezel dust filter

Some models are equipped with an optional front bezel dust filter. You must periodically clean the dust filter so that the dust collected on the filter does not impede air flow through the computer.

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NOTE: The optional front bezel dust filter is available from HP. To remove, clean, and replace the dust filter:


Front bezel dust filter 21

System board connections

Refer to the following illustration and table to identify the system board connectors for your model.


Item System board connector System board label Color Component

X4PCIEXP White Expansion card

Memory

The computer comes with double data rate 4 synchronous dynamic random access memory (DDR4-SDRAM) dual inline memory modules (DIMMs).

The memory sockets on the system board are populated with at least one preinstalled memory module. To achieve the maximum memory support, you can populate the system board with up to 64 GB of memory configured in a high-performing dual-channel mode.

For proper system operation, the DIMMs must adhere to the following specifications:

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NOTE: The system does not operate properly if you install unsupported memory modules.

#### Populating DIMM sockets

There are four memory sockets on the system board, with two sockets per channel. The sockets are labeled DIMM1, DIMM2, DIMM3, and DIMM4. Sockets DIMM1 and DIMM2 operate in memory channel B. Sockets DIMM3 and DIMM4 operate in memory channel A.

The system will automatically operate in single-channel mode, dual-channel mode, or flex mode, depending on how the DIMMs are installed.

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NOTE: Single-channel and unbalanced dual-channel memory configurations will result in inferior graphics performance.

DIMM and one 1 GB DIMM, and Channel B should be populated with the other two 1 GB DIMMs. With this configuration, 4 GB will run as dual-channel and 1 GB will run as single-channel.

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IMPORTANT: You must disconnect the power cord and wait approximately 30 seconds for the power to drain before adding or removing memory modules. Regardless of the power-on state, voltage is always supplied to the memory modules as long as the computer is plugged into an active AC outlet. Adding or removing memory modules while voltage is present may cause irreparable damage to the memory modules or system board.

The memory module sockets have gold-plated metal contacts. When upgrading the memory, it is important to use memory modules with gold-plated metal contacts to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other.

Static electricity can damage the electronic components of the computer or optional cards. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. For more information, refer to Electrostatic discharge information on page 9.

When handling a memory module, be careful not to touch any of the contacts. Doing so may damage the module.

#### Removing and installing DIMMs


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NOTE: A memory module can be installed in only one way. Match the notch on the module with the tab on the memory socket. Populate the black DIMM sockets before the white DIMM sockets. For maximum performance, populate the sockets so that the memory capacity is spread as equally as possible between Channel A and Channel B.


Expansion card For a list of available expansion cards, see Computer major components on page 4. The computer has two PCI Express x1 expansion sockets, one PCI Express x16 expansion socket, and one PCI Express x16 expansion socket that is downshifted to a x4 socket. NOTE: The PCI Express sockets support only low profile cards. You can install a PCI Express x1, x4, x8, or x16 expansion card in the PCI Express x16 socket. For dual graphics card configurations, the first (primary) card must be installed in the PCI Express x16 socket that is NOT downshifted to a x4. To remove, replace, or add an expansion card:

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NOTE: Before removing an installed expansion card, disconnect any cables that may be attached to the expansion card.


####### b. If you are removing a PCI Express x1 card, hold the card at each end and carefully rock it back andforth until the connectors pull free from the socket. Lift the card straight up (1) then away from theinside of the chassis (2) to remove it. Be sure not to scrape the card against other components.



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IMPORTANT: After removing an expansion card, you must replace it with a new card or expansion slot cover for proper cooling of internal components during operation.


NOTE: When installing an expansion card, press firmly on the card so that the whole connector is seated properly in the expansion card socket.


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Drives

For a list of available drives, see Computer major components on page 4.

#### Drive positions


######### Drive positions

NOTE: The drive configuration on your computer may be different than the drive configuration shown above.

#### Removing and installing drives

When installing drives, follow these guidelines:

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IMPORTANT: To prevent loss of work and damage to the computer or drive:

If you are inserting or removing a drive, shut down the operating system properly, turn off the computer, and unplug the power cord. Do not remove a drive while the computer is on or in standby mode.

Before handling a drive, be sure that you are discharged of static electricity. While handling a drive, avoid touching the connector. For more information about preventing electrostatic damage, refer to Electrostatic discharge information on page 9.

Handle a drive carefully; do not drop it. Do not use excessive force when inserting a drive. Avoid exposing a hard drive to liquids, temperature extremes, or products that have magnetic fields such as monitors or speakers. If a drive must be mailed, place the drive in a bubble-pack mailer or other protective packaging and label the package “Fragile: Handle With Care.”

##### Removing a 9.5 mm slim optical drive

CAUTION: All removable media should be taken out of a drive before removing the drive from the computer.

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IMPORTANT: When removing the cables, pull the tab or connector instead of the cable itself to avoid damaging the cable.


####### 4. Push the green release latch on the right rear side of the drive toward the center of the drive (1), andthen slide the drive forward and out of the bay (2).


##### Installing a 9.5 mm slim optical drive



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Removing a 3.5-inch hard drive NOTE: Before you remove the old hard drive, be sure to back up the data from the old hard drive so that you can transfer the data to the new hard drive. There are two 3.5-inch hard drive bays. The procedure for removing a 3.5-inch hard drive is the same for each drive bay.

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####### 4. Pull the release lever next to the rear of the hard drive outward (1). While pulling the release lever out,lift the rear of the drive up (2), and then slide the front of the drive back and lift it out of the bay (3).


####### 5. Remove the four mounting screws (two on each side) from the old drive. You will need these screws ifyou install a new drive.


##### Installing a 3.5-inch hard drive

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NOTE: There are two 3.5-inch hard drive bays. The procedure for installing a 3.5-inch hard drive is the same for each drive bay.

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NOTE: If replacing a 3.5-inch hard drive, transfer the mounting screws from the old hard drive to the new hard drive. If you are adding a second 3.5-inch hard drive, you can purchase extra mounting screws from HP.



####### – Secure the drive to the bay adapter bracket by installing four black M3 adapter bracket screwsthrough the underside of the bracket and into the drive.




####### 5. Connect the power cable (1) and data cable (2) to the rear of the hard drive.

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NOTE: If the 3.5-inch hard drive is the primary drive, connect the other end of the data cable to the dark-blue SATA connector on the system board labeled SATA0. If it is a secondary hard drive, connect the other end of the data cable to one of the light-blue SATA connectors on the system board.


####### 6. Reassemble the computer.

##### Drive cage

Rotate the drive cage to remove and install a 2.5-inch hard drive, and to access components underneath.


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##### Removing a 2.5-inch hard drive



##### Installing a 2.5-inch hard drive


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NOTE: If the 2.5-inch hard drive is the primary drive, connect the other end of the data cable to the dark-blue SATA connector on the system board labeled SATA0. If it is a secondary hard drive, connect the other end of the data cable to one of the light-blue SATA connectors on the system board.


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##### Removing and installing an M.2 SSD storage card

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NOTE: The computer supports 2230 and 2280 M.2 SSD cards.



WLAN module The WLAN module installs into a connector on the system board. For a list of available WLAN modules, see Computer major components on page 4. To remove the WLAN module:

NOTE: The WLAN antenna cable labeled “1” connects to the WLAN module “Main” terminal labeled “1”. The WLAN antenna cable labeled “2” connects to the WLAN module “Aux” terminal labeled “2”.

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Reverse this procedure to install the WLAN module.

Hood lock

The hood lock is secured to the back of the computer.

from the clip on the fan duct (2).

lock from the inside of the computer (4).


To install the hood lock, reverse the removal procedure.

Hood lock 47

Card reader

The card reader is secured to the front of the computer behind the bezel.


To install the card reader, reverse the removal procedure.

Antennas

The wireless antennas are secured to both the front and back of the computer behind.


Antennas 49


To install the antennas, reverse the removal procedure.

Air duct The air duct sits over the fan sink. Air ducts are available for models that use up to a 65 W processor and models that use a 95 W processor.



To install the air duct, reverse the removal procedure.

Air duct 51

Option board

An option board can be installed near the back of the system board that provides an additional connector on the rear I/O panel.


To reinstall the option board, reverse the removal procedure.

Optional rear port The optional rear port is attached to the rear of the chassis with two screws. To remove the optional rear port:


To install the optional rear port, reverse the removal procedures.

Optional rear port 53

Fan sink

CAUTION: The bond between the fan sink and the processor may be very tight.

If the computer will power on, before removing the fan sink, turn on the computer until it warms the fan sink. Warming the heat sink lessens the bond between the fan sink and the processor, thereby making separating them easier.

Make sure not to pull the processor out of the socket when you lift the fan sink, especially if you cannot warm the fan sink prior to removal. Inadvertently removing the processor can damage the pins.

Fan sinks are available for models that use up to a 65 W processor and models that use a 95 W processor. The fan sink is secured atop the processor with four captive Torx screws.

CAUTION: Fan sink retaining screws should be removed in diagonally opposite pairs (as in an X) to even the downward forces on the processor. This is especially important as the pins on the socket are very fragile and any damage to them may require replacing the system board.


###### 95 W processor models


Fan sink 55


When reinstalling the fan sink, make sure that its bottom has been cleaned with an alcohol wipe and fresh thermal grease has been applied to the top of the processor.

CAUTION: Fan sink retaining screws should be tightened in diagonally opposite pairs (as in an X) to evenly seat the fan sink on the processor to avoid damage that could require replacing the system board. Failure to install the baffle may cause the computer to overheat.

Fan

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The fan is secured to the back of the computer. IMPORTANT: The rear fan is used only in models with a 95 W processor.


To install the fan, reverse the removal procedure.

Fan 57

Processor

For a list of available processors, see Computer major components on page 4.

CAUTION: Do NOT handle the pins in the processor socket. These pins are very fragile and handling them could cause irreparable damage. Once pins are damaged it may be necessary to replace the system board.

The heat sink must be installed within 24 hours of installing the processor to prevent damage to the processor’s solder connections.


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NOTE: After installing a new processor onto the system board, always update the system ROM to ensure that the latest version of the BIOS is being used on the computer. The latest system BIOS can be found on the Web at: http://www.hp.com/support.

Power supply For a list of available power supplies, see Computer major components on page 4. WARNING! To reduce potential safety issues, only the power supply provided with the computer, a replacement power supply provided by HP, or a power supply purchased as an accessory from HP should be used with the computer. WARNING! Voltage is always present on the system board when the computer is plugged into an active AC outlet. To avoid possible personal injury and damage to the equipment the power cord should be disconnected from the computer and/or the AC outlet before opening the computer.


To install the power supply, reverse the removal procedure. CAUTION: When installing the power supply cables, make sure they are properly positioned so they are not pinched by the drive cage.

Power supply 59

Speaker

The speaker is attached to the front of the rotating drive cage.

(1).


To install the speaker, reverse the removal procedures.

System board NOTE: All system board spare part kits include replacement thermal material. NOTE: System board appearance may vary.

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####### 6. Disconnect the following cables from the system board:IMPORTANT: Connected cables may vary depending on system configuration.

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####### 7. Remove the eight Torx T15 screws that secure the system board to the chassis.



When reinstalling the system board, first insert the I/O panel back into the slots in the rear of the chassis, and then align the board with the chassis screw holes.

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NOTE: When replacing the system board, you must change the chassis serial number in the BIOS.

#### System board callouts


Sys Bd Label Color Component Sys Bd Label Color Component PWRCPU White 4-pin processor power SPKR White Speaker XU1 Silver Processor SSD2 Black M.2 solid-state drive CPUFAN White Processor fan SSD1 Black M.2 solid-state drive DIMM4 White Memory module PWR White 6-pin main power DIMM3 Black Memory module PWRCMD White Power supply DIMM2 White Memory module PSWD Green Clear system passwords DIMM1 Black Memory module X4PCIEXP Black Expansion card CMOS Yellow Reset CMOS X1PCIEXP1 Black Expansion card BAT Black RTC battery X1PCIEXP2 Black Expansion card WIRELESS Black WLAN X16PCIEXP White Expansion card SATA PWR Black Drives COMA Black Optional second serial port

SATA2 Light blue Any SATA Device other than primary hard drive

CHFAN2 Brown Fan

HLCK Black Hood lock

SD RDR Black Card reader COMM_DP Silver Option port

Changing from desktop to tower orientation

The Small Form Factor computer can be used in a tower orientation with an optional tower stand that can be purchased from HP.

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NOTE: To stabilize the computer in a tower orientation, HP recommends the use of the optional tower stand.


NOTE: Be sure that at least 10.2 centimeters (4 inches) of space on all sides of the computer remains clear and free of obstructions.

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Changing from desktop to tower orientation 65

5 Computer Setup (F10) Utility

Computer Setup (F10) Utilities

Use Computer Setup (F10) Utility to do the following:

#### Using Computer Setup (F10) Utilities

Computer Setup can be accessed only by turning the computer on or restarting the system. To access the Computer Setup Utilities menu, complete the following steps:

You can also press Esc to a menu that allows you to access different options available at startup, including the Computer Setup utility.

NOTE: If you do not press F10 at the appropriate time, you must restart the computer and again repeatedly press F10 when the monitor light turns green to access the utility.

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NOTE: Selecting UEFI Drivers restarts the computer into the 3rd party option ROM management application. You can access this application directly by pressing F3 during startup.

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NOTE: Settings in the Security menu are not modified by Apply Defaults. Those values are reset by

Restore Security Settings to Factory Defaults at the bottom of the Security menu. NOTE: Not all settings shown in the following sections are available for all models

CAUTION: Do NOT turn the computer power OFF while the BIOS is saving the Computer Setup (F10) changes because the settings could become corrupted. It is safe to turn off the computer only after exiting the F10 Setup screen.

Computer Setup–Main NOTE: Support for specific Computer Setup options may vary depending on the hardware configuration. Table 5-1 Computer Setup—Main

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Option Description System Information Lists all information in following list if Advanced System Information is selected. Lists smaller subset if

Basic System Information is selected.

System Diagnostics If the hard drive has the HP Advanced Diagnostics installed, the application will launch. If HP Advanced Diagnostics is not installed, then a basic version built into the BIOS will provide the capability to perform the following functions:

Update System BIOS Lets you update the system BIOS from www.hp.com or another network server, from a removable USB drive, or from a file located on the hard drive. Displays current BIOS version information.

The string that appears here depends on the setting in ‘BIOS Update Preferences’. This selection checks for the latest BIOS release revision on the netowrk and lets you choose whether to download the BIOS image and update the computer.

NOTE: If MS Windows BitLocker Drive Encryption (BDE) is enabled, you must suspend BDE temporarily before flashed. Be sure to obtain the BDE recovery password or recovery PIN before suspending BDE. You can enable BDE after updating the BIOS.

Lets you select whether a minimum BIOS version can be allocated. If ‘Restricted rollback to older BIOS’ is selected, ‘Minimum BIOS version’ becomes active. Select to enter the minimum BIOS version that can be rolled back to.

Allows the administrator to select the source of network updates (www.hp.com or another network server) and allows configuration of a periodic check for updates, including policies for:

Change Date and Time Allows you to set system time and date. System IDs Lets you set the following values:

Replicated Setup Backup current settings to USB device Saves system configuration to a formatted USB flash media device. Restore current settings from USB device Restores system configuration from a USB flash media device.

Save Custom Defaults Saves the current system configuration settings as the custom default set. Apply Custom Defaults and Exit

Applies the custom default settings to the computer after rebooting. Does not apply to options in the Security menu.

Apply Factory Defaults and Exit

Restores the factory system configuration settings to the computer after rebooting. Does not apply to options in the Security menu.

Ignore Changes and Exit Exits Computer Setup without applying or saving any changes. Save Changes and Exit Saves changes to current system configuration, exits Computer Setup, and reboots.

Computer Setup—Security NOTE: Support for specific Computer Setup options may vary depending on the hardware configuration. Table 5-2 Computer Setup—Security Option Description Set up BIOS Administrator Password

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Lets you set and enable a BIOS administrator password, which controls access to the following features:

NOTE: If the password is set, it is required to change Computer Setup options, update the BIOS, and make changes to certain plug and play settings under Windows.

Change BIOS Administrator Password

(This selection is active only if a BIOS administrator password is set.)

Lets you change the BIOS administrator password. You must know the current password to be able to change it.

Password Policies Let you set the guidelines for a valid password. Options include:

Select ‘Honor’ to allow or ‘Ignore’ to not allow the absence of the password jumper to clear the passwords at boot up. Default is ‘Honor’.

Security Configuration TPM Embedded Security

Displays the current TPM version.

Select to reset the TPM to an unowned state. After the TPM is cleared, it is also turned off. To temporarily suspend TPM operations, turn the TPM off instead of clearing it.

CAUTION: Clearing the TPM resets it to factory defaults and turns it off. You will lose all created keys and data protected by those keys.

BIOS Sure Start

IMPORTANT: Only select Manual in situations in which forensic analysis is to be performed before HP Sure Start Recovery. When this policy is set to manual, HP Sure Start will not correct any issues that are found until the manual recovery key sequence is entered by the local user. This can result in a system that is unable to boot after inputting the manual recovery key sequence.

Physical Presence Interface. Notifies the user upon system power up when changes are made to system security policy. The user must agree to the changes to confirm them. Default is enabled.

Smart Cover

Enabling this feature disables OS management of Embedded Security Device, prevents a reset of the Embedded Security Device, and prevents the configuration of VTx, VTd, and Embedded Security Device.

Utilities Hard Drive Utilities

NOTE: Windows 10 systems are generally not formatted to include an MBR. Instead they use GUID Partition Table (GPT) format, which better supports large hard drives. Enabling this feature will save the Master Boot Record (MBR) of the system hard drive. If the MBR gets changed, the user will be prompted to restore the MBR. Default is disabled. The MBR contains information needed to successfully boot from a disk and to access the data stored on the disk. Master Boot Record Security may prevent unintentional or malicious changes to the MBR, such as those caused by some viruses or by the incorrect use of certain disk utilities. It also allows you to recover the "last known good" MBR, should changes to the MBR be detected when the system is restarted. NOTE: Most operating systems control access to the MBR of the current bootable disk; the BIOS cannot prevent changes that may occur while the operating system is running. Restores the backup Master Boot Record to the current bootable disk. Default is disabled. Only appears if all of the following conditions are true:

Enabling this feature will save the GUID Partition Table (GPT) of the system hard drive. If the GPT is subsequently changed, the user is prompted to choose whether to restore GPT.

Allows you to assign or modify a master or user password for hard drives. When this feature is enabled, the user is prompted to provide one of the DriveLock passwords during POST. If neither is successfully entered, the hard drive will remain inaccessible until one of the passwords is successfully provided during a subsequent cold-boot sequence.

NOTE: This selection will only appear when at least one drive that supports the DriveLock feature is attached to the system.

CAUTION: Be aware that these settings take place immediately. A save is not necessary. CAUTION: Be sure to document the DriveLock password. Losing a DriveLock password will render a drive permanently locked. After you select a drive, the following options are available:

System Management Command

Restore Security Settings to Default

Set DriveLock Master Password. Sets the drive’s master password but does not enable DriveLock. Enable DriveLock. Sets the drive’s user password and enables DriveLock.

Once a hard drive has been erased with a program that utilizes Secure Erase firmware commands, no file recovery program, partition recovery program, or other data recovery method will be able to extract data from the drive.

Allows authorized personnel to reset security settings during a service event. Default is enabled.

This action resets security devices, clears BIOS passwords (not including DriveLock), and restores settings in the Security menu to factory defaults.

#### Computer Setup—Advanced NOTE: Support for specific Computer Setup options may vary depending on the hardware configuration. Table 5-3 Computer Setup—Advanced (for advanced users)

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Option Heading Display Language Lets you select the language of the menus in F10 Setup and the keyboard layout. Scheduled Power-On This feature wakes the system up from a powered off state at a specified date and time. Boot Options Select the devices that the computer can boot from, as well as other options, including:

NOTE: If the system is configured to ‘Power On from Keyboard Ports’ (see Power Management Options), then this setting is forced to ‘Power On’.

Default is enabled. Specify the order in which UEFI boot sources (such as a internal hard drive, USB hard drive, USB optical drive, or internal optical drive) are checked for a bootable operating system image.

UEFI boot sources always have precedence over legacy boot sources.

Secure Boot Configuration

Configure Legacy Support and Secure Boot

Lets you turn off all legacy support on the computer, including booting to DOS, running legacy graphics cards, booting to legacy devices, and so on.

Lets you make sure an operating system is legitimate before booting to it, making Windows resistant to malicious modification from preboot to full OS booting, preventing firmware attacks. UEFI and Windows Secure Boot only allow code signed by pre-approved digital certificates to run during the firmware and OS boot process.

Lets you delete any previously loaded custom boot keys. Clearing keys will disable secure boot. Default is disabled.

Reset Secure Boot keys to factory defaults Default is disabled. Enable MS UEFI CA key

Disabling this setting alters the Secure Boot key list to further restrict the allowed software components. Set this option to ‘disable’ to support Device Guard.

######### System Options Turbo boost

Intel Turbo Boost Technology (TBT) automatically allows processor cores to run faster than the base operating frequency if it is operating below power, current, and temperature specification limits. Default is enabled.

######### Hyperthreading (enable/disable)

Delivers two logical processors that can execute multiple tasks simultaneously using the shared hardware resources of a single processor core. Default is enabled.

Multi-processor Use this option to disable multi-processor support under the operating system. Default is enabled. Virtualization Technology (VTx) (Intel only)

Controls the virtualization features of the processor. Changing this setting requires turning the computer off and then back on. Default is disabled.

######### Virtualization Technology for Directed I/O (VTd) (Intel only)

Controls virtualization DMA remapping features of the chipset. Changing this setting requires turning the computer off and then back on. Default is disabled.

PCI Express Slot x (enable/disable) Lets you disable individual expansion slots. Default is enabled. M.2 WLAN/BT Lets you disable the wireless module slot. Default is enabled. M.2 SSD Lets you disable the M.2 solid-state drive slot. Default is enabled. Allow PCIe/PCI SERR# Interrupt (enable/disable)

Allows PCI devices to report PCI/PCIe System Error signals, such as address parity errors, data parity errors, and critical errors other than parity. Default is enabled.

Power Button Override (disable/4 sec/15 sec/30 sec)

Lets you disable or enable and select the number of seconds you have to hold down the power button for it to force the system to power off. Default is ‘4 sec’.

Configure Storage Controller for RAID Configure Storage Controller for Intel Optane

Built-In Device Options Embedded LAN Controller Select to show the device in the operating system. Default is enabled. Wake On LAN

Lets you either disable the Wake On LAN feature, or configure where the computer boots, including the network or hard drive. Default is Boot to Network.

######### Dust Filter

Select to enable the Dust Filter replacement reminder, which can be set for 15, 30, 60, 90, 120, or 180 days. The reminder will show during POST after the reminder timer has expired.

######### Video Memory Size

Use this option to manage graphics memory allocation. The value you choose is allocated permanently to graphics and is unavailable to the operating system.

Audio Device Select to show the device in the operating system. Default is enabled. Internal Speakers (does not affect external speakers)

Clear to disable the chassis speaker or speakers. This function is applicable to normal audio playback in the operating system and does not affect the error or warning beeps during POST. Default is enabled.

######### Increase Idle Fan Speed(%)

Sets idle fan speed percentage. This setting only changes the minimum fan speed. The fan is still automatically controlled.

USB Type-C Connector System Software Interface (UCSI) Allows the operating system to monitor and report USB Type-C events and status. Default is enabled.

######### Port Options Serial Port A/B

Lets you disable the port. Default is enabled.

Option ROM Launch Policy

Power Management Options

NOTE: Serial Port A and/or Serial Port B settings are available depending on installed hardware. I/O Address A/B Lets you specify the address. Default is enabled. Interrupt A/B Lets you specify the address. Default is enabled. Lets you disable the following ports (default is enabled):

Restrict USB Devices Specify the following categories of USB devices to enable:

When some devices are restricted, the system will disable USB ports that do not meet the allowed criteria. This feature is usually combined with similar policies within the operating system since USB devices can be moved to different ports. The ports disabled by the BIOS will remain disabled until the system is restarted.

These policies control whether Legacy Option ROMs or UEFI drivers are loaded. Default is ‘All UEFI’ for Windows 10 or later.

######### Configure Option ROM Launch Policy

Runtime Power Management (enable/disable)

Allows certain operating systems to reduce processor voltage and frequency when the current software load does not require the full capabilities of the processor. Default is enabled.

######### Extended Idle Power States (enable/disable)

Allows certain operating systems to decrease the processors power consumption when the processor is idle. Default is enabled.

######### S5 Maximum Power Savings (enable/disable)

Enabling this feature reduces the power of the system as much as possible in the S5 state. Power is removed from the wake up circuitry, the expansion slots, and any management features while in S5. Default is disabled.

######### SATA Power Management (enable/disable)

Remote Management Options

Enables or disables SATA bus and/or device power management. Default is enabled. PCI Express Power Management (enable/disable)

Enabling this option permits the PCI Express links to use Active Power State Management (ASPM) to enter lower power states while not in use. Default is enabled.

######### Unique Sleep State Blink Rates (enable/disable)

This feature is designed to provide a visual indication of what sleep state the system is in. Each sleep state has a unique blink pattern. Default is disabled.

NOTE: A normal shutdown goes to the S4 state for Windows 10 or later. S0 (On) = Solid white LED.

When enabled, this feature allows a key press to power on the system when it is off (S5 state). If using a USB keyboard, it must be plugged into one of the rear ports labeled with the keyboard icon. Default is disabled.

Active Management (AMT) (Intel only) (enable/disable). Default is enabled. Allows you to discover, repair, and protect networked computing devices. USB Key Provisioning Support (enable/disable) Default is disabled. USB Redirection Support (enable/disable). Default is enabled.

USB redirection allows USB devices plugged into a client computer to be transparently redirected to the guest operating system.

Unconfigure AMT on next boot (Do Not Apply/Apply). Default is ‘Do Not Apply’. SOL Terminal Emulation Mode (ANSI / VT100). Default is ANSI. SOL terminal emulation mode is only activated during remote AMT redirection operations. The emulation options allow administrators to select which mode works best with their console. Show Unconfigure ME Confirmation Prompt (enable/disable). Default is enabled. Verbose Boot Messages (enable/disable). Default is enabled.

Verbose boot shows additional logging information during the boot. mainly for debugging if something goes wrong during bootup.

Watchdog Timer (enable/disable). Default is enabled.

Allows you to set amount of time for a operating system and BIOS watchdog alert to be sent if the timers are not deactivated. BIOS watchdog is deactivated by BIOS and would indicate that a halt occurred during execution if the alert is sent to the management console. An operating system alert is deactivated by the operating system image and would indicate that a hang occurred during its initialization.

CIRA is Customer Initiated Remote Assistance, an Intel service to help users employing Active Management Technology (AMT).

#### Computer Setup—UEFI Drivers

Lets you restart the computer into the 3rd Party Option ROM Management application. You can start this application directly by pressing F3 during startup.

Recovering the Configuration Settings

This method of recovery requires that you first perform the Save to Removable Media command with the Computer Setup (F10) Utility before Restore is needed. (See Computer Setup–Main on page 68 in the Computer Setup—File table.)

The Save to Removable Media option creates a file named HPSETUP.TXT on an inserted USB flash media device. This file can be edited to change the settings on Restore. An asterisk (*) marks the selected option for a setting.

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NOTE: It is recommended that you save any modified computer configuration settings to a USB flash media device and save the device for possible future use. To restore the configuration, insert the USB flash media device with the saved configuration and perform the Restore from Removable Media command with the Computer Setup (F10) Utility. (See Computer Setup–Main on page 68 in the Computer Setup—File table.)

6 Troubleshooting without diagnostics

This chapter provides information on how to identify and correct minor problems, such as USB devices, hard drive, optical drive, graphics, audio, memory, and software problems. If you encounter problems with the computer, refer to the tables in this chapter for probable causes and recommended solutions.

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NOTE: For information on specific error messages that may appear on the screen during Power-On Self-Test (POST) at startup, refer to POST error messages and diagnostic front panel LEDs and audible codes on page 107.

Safety and comfort

WARNING! Misuse of the computer or failure to establish a safe and comfortable work environment may result in discomfort or serious injury. Refer to the Safety & Comfort Guide at http://www.hp.com/ergo for more information on choosing a workspace and creating a safe and comfortable work environment. For more information, refer to the Safety & Regulatory Information guide.

Before you call for technical support

If you are having problems with the computer, try the appropriate solutions below to try to isolate the exact problem before calling for technical support.

To assist you in resolving problems online, HP Instant Support Professional Edition provides you with selfsolve diagnostics. If you need to contact HP support, use HP Instant Support Professional Edition's online chat feature. Access HP Instant Support Professional Edition at: http://www.hp.com/go/ispe.

Access the Business Support Center (BSC) at http://www.hp.com/go/bizsupport for the latest online support information, software and drivers, proactive notification, and worldwide community of peers and HP experts.

Safety and comfort 79

If it becomes necessary to call for technical assistance, be prepared to do the following to ensure that your service call is handled properly:

CAUTION: Restoring the system will erase all data on the hard drive. Be sure to back up all data files before running the restore process.

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NOTE: For sales information and warranty upgrades (Care Packs), call your local authorized service provider or dealer.

Helpful hints

If you encounter problems with the computer, monitor, or software, see the following list of general suggestions before taking further action:

CAUTION: When the computer is plugged into an AC power source, there is always voltage applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

Solving general problems

You may be able to easily resolve the general problems described in this section. If a problem persists and you are unable to resolve it yourself or if you feel uncomfortable about performing the operation, contact an authorized dealer or reseller.

WARNING! When the computer is plugged into an AC power source, voltage is always applied to the system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the wall outlet and allow the internal system components to cool before touching.

Cannot access the Computer Setup (F10) Utility when booting the computer. Cause Solution

The Computer Setup (F10) Utility is set to “fast boot” causing the F10 access screen to display too briefly when booting the computer.

Before turning on the computer, press and hold F10. Turn on the computer and continue to hold F10 until the Computer Setup (F10) Utility is displayed.

Computer appears locked up and will not turn off when the power button is pressed. Cause Solution Software control of the power switch is not functional. 1. Press and hold the power button for at least four seconds

until the computer turns off.

Computer will not respond to keyboard or mouse. Cause Solution Computer is in Sleep state. To resume from Sleep state, press the power button.

CAUTION: When attempting to resume from Sleep state, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data.

System has locked up. Restart computer.

Computer date and time display is incorrect. Cause Solution RTC (real-time clock) battery may need to be replaced. NOTE: Connecting the computer to a live AC outlet prolongs the life of the RTC battery.

Reset the date and time under Control Panel (Computer Setup can also be used to update the RTC date and time). If the problem persists, replace the RTC battery. See the Removal and Replacement section for instructions on installing a new battery, or contact an authorized dealer or reseller for RTC battery replacement.

To access Control Panel in Windows 10, type control panel in the taskbar search box, and then select Control Panel.

There is no sound or sound volume is too low. Cause Solution System volume may be set low or muted. 1. Check the Computer Setup settings to make sure the

internal system speaker is not muted (this setting does not affect the external speakers).

Cannot remove computer cover or access panel. Cause Solution Smart Cover Lock, featured on some computers, is locked. Unlock the Smart Cover Lock using Computer Setup.

In case of forgotten password, power loss, or computer malfunction, you must manually disable the Smart Cover lock . A key to unlock the Smart Cover Lock is not available from HP. Keys are typically available from a hardware store.

Poor performance. Cause Solution Processor is too hot. 1. Make sure airflow to the computer is not blocked. Leave a

10.2-cm (4-inch) clearance on all vented sides of the computer and above the monitor to permit the required airflow.

Hard drive is full. Transfer data from the hard drive to create more space on the hard drive.

Low on memory. Add more memory.

Poor performance. Cause Solution Hard drive fragmented. Defragment hard drive. Program previously accessed did not release reserved memory back to the system.

Restart the computer.

Virus resident on the hard drive. Run virus protection program. Too many applications running. 1. Close unnecessary applications to free up memory.

Some software applications, especially games, are stressful on the graphics subsystem.

Cause unknown. Restart the computer.

Computer powered off automatically and the Power LED flashes red four times and then white two times. Cause Solution

Processor thermal protection activated: A fan may be blocked or not turning. OR The heat sink is not properly attached to the processor.

System does not power on and the LEDs on the front of the computer are not flashing. Cause Solution System unable to power on. Press and hold the power button for less than 4 seconds. If the

hard drive LED turns white, then:

System does not power on and the LEDs on the front of the computer are not flashing. Cause Solution

Press and hold the power button for less than 4 seconds. If the hard drive LED does not turn on white then:

Solving power problems

Common causes and solutions for power problems are listed in the following table. Power supply shuts down intermittently. Cause Solution

If equipped with a voltage selector, voltage selector switch on rear of computer chassis (some models) not switched to correct line voltage (115V or 230V).

Power supply will not turn on because of internal power supply fault.

Select the proper AC voltage using the selector switch.

Replace the power supply.

Computer powered off automatically and the Power LED flashes Red two times, once every second, followed by a two second pause, and the computer beeps two times. (Beeps stop after fifth iteration but LEDs continue flashing.)

Computer powered off automatically and the Power LED flashes red four times and then white two times. Cause Solution

Processor thermal protection activated: A fan may be blocked or not turning. OR The heat sink is not properly attached to the processor.

Power LED flashes Red four times, once every second, followed by a two second pause, and the computer beeps four times. (Beeps stop after fifth iteration but LEDs continue flashing.)

Computer powered off automatically and the Power LED flashes red three times and then white four times. Cause Solution Power failure (power supply is overloaded). 1. If equipped with a voltage selector, check that the voltage

selector, located on the rear of the power supply (some models), is set to the appropriate voltage. Proper voltage setting depends on your region.

Solving power problems 85

Solving hard drive problems

Hard drive error occurs. Cause Solution Hard disk has bad sectors or has failed. 1. In Windows 10, type file in the taskbar search box, and

then select File Explorer from the list of applications. In the left column, expand This PC, right-click on a drive, select Properties, and then select the Tools tab. Under Error checking click Check.

necessary, reformat the hard disk.

Disk transaction problem. Cause Solution

Either the directory structure is bad or there is a problem with a file.

In Windows 10, type file in the taskbar search box, and then select File Explorer from the list of applications. In the left column, expand This PC, right-click on a drive, select Properties, and then select the Tools tab. Under Error checking click Check.

Drive not found (identified). Cause Solution Cable could be loose. Check cable connections. The system may not have automatically recognized a newly installed device.

See reconfiguration directions in the Solving hardware installation problems on page 97 section. If the system still does not recognize the new device, check to see if the device is listed within Computer Setup. If it is listed, the probable cause is a driver problem. If it is not listed, the probable cause is a hardware problem.

If this is a newly installed drive, run the Computer Setup utility and try adding a POST delay under Advanced > Boot Options.

The device is attached to a SATA port that has been hidden in Computer Setup.

Run the Computer Setup utility and ensure Device Available is selected for the device's SATA port in Advanced > Port Options.

Drive responds slowly immediately after power-up. Run Computer Setup and increase the POST Delay in Advanced >

Boot Options.

Nonsystem disk/NTLDR missing message. Cause Solution

The system is trying to start from the hard drive but the hard drive may have been damaged.

▲ Perform Drive Protection System (DPS) testing in system

ROM. System files missing or not properly installed. 1. Insert bootable media and restart the computer.

recovery option. If only a restore kit is available, then select

Nonsystem disk/NTLDR missing message. Cause Solution

the File Backup Program option, and then restore the system.

Hard drive boot has been disabled in Computer Setup. Run the Computer Setup utility and enable the hard drive entry in the Advanced > Boot Options list.

Bootable hard drive is not attached as first in a multi-hard drive configuration.

If attempting to boot from a hard drive, ensure it is attached to the system board dark blue SATA connector.

Bootable hard drive is not listed first in the Boot Order. Run the Computer Setup utility and select Advanced > Boot Options and ensure the bootable hard drive is listed immediately under the Hard Drive entry.

Computer will not boot from hard drive. Cause Solution

The device is attached to a SATA port that has been hidden in Computer Setup.

Boot order is not correct. Run the Computer Setup utility and change boot sequence in

######### Advanced > Boot Options.

Hard drive is damaged. Observe if the front panel Power LED is blinking RED and if any beeps are heard. See POST error messages and diagnostic front panel LEDs and audible codes on page 107 to determine possible causes for the blinking red and beep codes. See the Worldwide Limited Warranty for terms and conditions.

Computer seems to be locked up. Cause Solution Program in use has stopped responding to commands. 1. Use the task manager to close programs that do not

respond.

Solving hard drive problems 87

Solving media card reader problems

Media card will not work in a digital camera after formatting it in Windows. Cause Solution By default, Windows will format any media card with a capacity greater than 32MB with the FAT32 format. Some digital cameras use the FAT (FAT16 & FAT12) format and can not operate with a FAT32 formatted card.

Either format the media card in the digital camera or select FAT file system to format the media card in a computer with Windows.

A write-protected or locked error occurs when attempting to write to the media card. Cause Solution

Media card is locked. Locking the media card is a safety feature that prevents writing to and deleting from an SD/Memory Stick/PRO card.

If using an SD card, make sure that the lock tab located on the right of the SD card is not in the locked position. If using a Memory Stick/PRO card, make sure that the lock tab located on the bottom of the Memory Stick/PRO card is not in the locked position.

Can not write to the media card. Cause Solution The media card is a read-only memory (ROM) card. Check the manufacturer’s documentation included with your card

to see if it writable. Refer to the previous section for a list of compatible cards.

Media card is locked. Locking the media card is a safety feature that prevents writing to and deleting from an SD/Memory Stick/PRO card.

If using an SD card, make sure that the lock tab located on the right of the SD card is not in the locked position. If using a Memory Stick/PRO card, make sure that the lock tab located on the bottom of the Memory Stick/PRO card is not in the locked position.

Unable to access data on the media card after inserting it into a slot. Cause Solution

The media card is not inserted properly, is inserted in the wrong slot, or is not supported.

Ensure that the card is inserted properly with the gold contact on the correct side. The green LED will light if inserted properly.

Do not know how to remove a media card correctly. Cause Solution The computer’s software is used to safely eject the card. In Windows 10, type file in the taskbar search box, and then

select File Explorer from the list of applications. In the left column, expand This PC, right-click on the corresponding drive icon, and then select Eject. Pull the card out of the slot.

NOTE: Never remove the card when the green LED is flashing

After installing the media card reader and booting to Windows, the reader and the inserted cards are not recognized by the computer.

Cause Solution

The operating system needs time to recognize the device if the reader was just installed into the computer and you are turning the PC on for the first time.

Wait a few seconds so that the operating system can recognize the reader and the available ports, and then recognize the media inserted in the reader.

After inserting a media card in the reader, the computer attempts to boot from the media card. Cause Solution The inserted media card has boot capability. 1. If you do not want to boot from the media card, remove it

during boot or do not select the option to boot from the inserted media card during the boot process.

Solving display problems

If you encounter display problems, see the documentation that came with the monitor and to the common causes and solutions listed in the following table.

Blank screen (no video). Cause Solution Monitor is not turned on and the monitor light is not on. Turn on the monitor and check that the monitor light is on. Bad monitor. Try a different monitor. The cable connections are not correct. Check the cable connection from the monitor to the computer and

to the electrical outlet.

You may have a screen blanking utility installed or energy saver features are enabled.

Press any key or click the mouse button and type your password (if set).

System ROM is corrupted; system is running in Boot Block Emergency Recovery Mode (indicated by eight beeps).

You are using a fixed-sync monitor and it will not sync at the resolution chosen.

Reflash the system ROM with the latest BIOS image.

Be sure that the monitor can accept the same horizontal scan rate as the resolution chosen.

Computer is in Sleep state. Press the power button to resume from Sleep state.

CAUTION: When attempting to resume from Sleep state, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data.

Monitor cable is plugged into the wrong connector. Systems may have a monitor connection on both the motherboard or an add-in card. Try moving the monitor connection to a different connector on the back of the computer

Monitor settings in the computer are not compatible with the monitor.

######### 1. In Control Panel, select Category from the View by list, then under Appearance and Personalization, select Adjust screen resolution.

Blank screen (no video). Cause Solution

To access Control Panel in Windows 10, type control panel in the taskbar search box, and then select Control Panel from the list of applications.

to reset the resolution.

Monitor is configured to use an input that is not active. Use the monitor's on-screen menu controls to select the input that is being driven by the system. Refer to the monitor's user documentation for more information on the on-screen controls and settings.

######### Blank screen and the power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.)

Cause Solution Pre-video memory error. 1. Reseat DIMMs. Power on the system.

######### Blank screen and the power LED flashes Red six times, once every second, followed by a two second pause, and the computer beeps six times. (Beeps stop after fifth iteration but LEDs continue flashing.)

Cause Solution Pre-video graphics error. For systems with a graphics card:

######### Blank screen and the power LED flashes Red seven times, once every second, followed by a two second pause, and the computer beeps seven times. (Beeps stop after fifth iteration but LEDs continue flashing.)

Cause Solution System board failure (ROM detected failure prior to video). Replace the system board.

Monitor does not function properly when used with energy saver features. Cause Solution Monitor without energy saver capabilities is being used with energy saver features enabled.

Disable monitor energy saver feature.

Dim characters. Cause Solution The brightness and contrast controls are not set properly. Adjust the monitor brightness and contrast controls. Cables are not properly connected. Check that the graphics cable is securely connected to the

graphics card (if applicable) or video connector and the monitor.

Blurry video or requested resolution cannot be set. Cause Solution

If the graphics controller was upgraded, the correct graphics drivers may not be loaded.

Install the video drivers included in the upgrade kit.

Monitor is not capable of displaying requested resolution. Change requested resolution. Graphics card is bad. Replace the graphics card.

The picture is broken up, rolls, jitters, or flashes. Cause Solution

The monitor connections may be incomplete or the monitor may be incorrectly adjusted.

Monitor needs to be degaussed. Degauss the monitor. Refer to the documentation that came with the monitor for instructions.

Image is not centered. Cause Solution Position may need adjustment. Press the monitor's Menu button to access the OSD menu. Select

ImageControl/ Horizontal Position or Vertical Position to adjust the horizontal or vertical position of the image.

“No Connection, Check Signal Cable” displays on screen. Cause Solution Monitor video cable is disconnected. Connect the video cable between the monitor and computer.

CAUTION: Ensure that the computer power is off while connecting the video cable.

“Out of Range” displays on screen. Cause Solution

Video resolution and refresh rate are set higher than what the monitor supports.

Restart the computer and enter Safe Mode. Change the settings to a supported setting then restart the computer so that the new settings take effect.

To enter Safe Mode in Windows 10:

High pitched noise coming from inside a flat panel monitor. Cause Solution Brightness and/or contrast settings are too high. Lower brightness and/or contrast settings.

Fuzzy focus; streaking, ghosting, or shadowing effects; horizontal scrolling lines; faint vertical bars; or unable to center the picture on the screen (flat panel monitors using an analog VGA input connection only).

Cause Solution

Flat panel monitor’s internal digital conversion circuits may be unable to correctly interpret the output synchronization of the graphics card.

Graphics card is not seated properly or is bad (some models). 1. Reseat the graphics card.

Certain typed symbols do not appear correct. Cause Solution The font you are using does not support that particular symbol. Use the Character Map to locate and select the appropriate

symbol. You can copy the symbol from the Character Map into a document.

In Windows 10, type ch in the taskbar search box, and then select Character Map from the list of applications.

Solving audio problems

If the computer has audio features and you encounter audio problems, see the common causes and solutions listed in the following table.

Headset microphone connected to the front is not working or is very quiet. Cause Solution The front Headset connector supports CTIA (Cellular Telephone Industries Association) style headsets and not OMTP (Open Mobile Terminal Platform) style headsets. These differ by the microphone connections.

Make sure that a CTIA style headset is being used or use an OMTP style headset with a commercially available adapter that converts an OMTP headset to the CTIA pinout.

Sound cuts in and out. Cause Solution Processor resources are being used by other open applications. Shut down all open processor-intensive applications.

Sound does not come out of the speaker or headphones. Cause Solution Software volume control is turned down or muted. Double-click the Speaker icon on the taskbar, then make sure

that Mute is not selected and use the volume slider to adjust the volume.

Audio is hidden in Computer Setup. Enable the audio in Computer Setup: Advanced > Built-in Device

Options. The external speakers are not turned on. Turn on the external speakers. The audio device may be connected to the wrong jack. Ensure that the device is connected to the correct jack on the

computer. The rear audio jack output is the green receptacle. The speakers should be plugged into the line-out jack and the headphones should be plugged into the headphone jack.

External speakers plugged into the wrong audio jack on a recently installed sound card.

See the sound card documentation for proper speaker connection. The rear audio jack output is the green receptacle.

Headphones or devices connected to the line-out connector mute the internal speaker.

Turn on and use headphones or external speakers, if connected, or disconnect headphones or external speakers.

Computer is in Sleep state. Press the power button to resume from Sleep state.

CAUTION: When attempting to resume from Sleep state, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data.

Internal speaker is disabled in Computer Setup. Enable the internal speaker in Computer Setup. Select Advanced >

######### Built-in Device Options.

The application is set to use a different audio device than speakers.

Some graphics cards support audio over the DisplayPort connection (if applicable), so multiple audio devices may be listed in Device Manager. Make sure the correct device is being used.

To access Device Manager in Windows 10, type device manager in the taskbar search box, and then select Device Manager from the list of applications.

Solving audio problems 93

Sound does not come out of the speaker or headphones. Cause Solution Some applications can select which audio output device is used. Make sure the application has selected the correct audio device. The operating system controls may be set to use a different audio device as the default output device than what is expected.

Set the operating system to use the correct audio device.

Sound from headphones is not clear or muffled. Cause Solution

Headphones are plugged into the rear audio output connector. The rear audio output connector is for powered audio devices and is not designed for headphone use.

Plug the headphones into the headphone connector on the front of the computer.

Computer appears to be locked up while recording audio. Cause Solution The hard disk may be full. Before recording, make sure there is enough free space on the

hard disk. You can also try recording the audio file in a compressed format.

Line-in jack is not functioning properly. Cause Solution

Jack has been reconfigured in the audio driver or application software.

In the audio driver or application software, reconfigure the jack or set the jack to its default value.

There is no sound or sound volume is too low. Cause Solution

The application is set to use a different audio device than speakers.

Some graphics cards support audio over the DisplayPort connection (if applicable), so multiple audio devices may be listed in Device Manager. Make sure the correct device is being used.

To access Device Manager in Windows 10, type device manager in the taskbar search box, and then select Device Manager from the list of applications.

Some applications can select which audio output device is used. Make sure the application has selected the correct audio device. The operating system controls may be set to use a different audio device as the default output device than what is expected.

Set the operating system to use the correct audio device.

Solving printer problems

If you encounter printer problems, see the documentation that came with the printer and to the common causes and solutions listed in the following table.

Printer will not print. Cause Solution Printer is not turned on and online. Turn the printer on and make sure it is online. The correct printer drivers for the application are not installed. 1. Install the correct printer driver for the application.

where [printer port] is the address of the printer being used. If the printer works, reload the printer driver.

To run MS-DOS commands, press the Windows key + r, type cmd in the Open box, and then click OK.

If you are on a network, you may not have made the connection to the printer.

Make the proper network connections to the printer.

Printer may have failed. Run printer self-test.

Printer will not turn on. Cause Solution The cables may not be connected properly. Reconnect all cables and check the power cord and electrical

outlet.

Printer prints garbled information. Cause Solution The correct printer driver for the application is not installed. Install the correct printer driver for the application. The cables may not be connected properly. Reconnect all cables. Printer memory may be overloaded. Reset the printer by turning it off for one minute, then turn it back

on.

Printer will not print. Cause Solution The printer may be out of paper. Check the paper tray and refill it if it is empty.

Solving printer problems 95

Solving keyboard and mouse problems

If you encounter keyboard or mouse problems, see the documentation that came with the equipment and to the common causes and solutions listed in the following table.

A wireless keyboard/mouse is not working correctly. Symptoms include lagging mouse movement, jumpy mouse/keyboard, or no function of mouse/keyboard and external drive.

Cause Solution

If your computer is equipped with USB 3.0 ports, connected USB 3.0 devices can interfere with the wireless keyboard USB receiver.

Connect the wireless keyboard USB receiver to a USB 2.0 port that is separated from ports with USB 3.0 devices. If you still experience interference, you may have to place the connectors farther apart using an external USB hub.

Keyboard commands and typing are not recognized by the computer. Cause Solution Keyboard connector is not properly connected. Shut down the computer, reconnect the keyboard to the back of

the computer, and then restart the computer. Program in use has stopped responding to commands. Shut down your computer using the mouse and then restart the

computer. Keyboard needs repairs. See the Worldwide Limited Warranty for terms and conditions. Computer is in Sleep state. Press the power button to resume from Sleep state.

CAUTION: When attempting to resume from Sleep date, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data.

Mouse does not respond to movement or is too slow. Cause Solution

Mouse connector is not properly plugged into the back of the computer.

Shut down the computer using the keyboard. Windows 10:

Program in use has stopped responding to commands. Shut down the computer using the keyboard then restart the computer.

Mouse may need cleaning. Remove the roller ball cover on the mouse and clean the internal components.

Mouse does not respond to movement or is too slow. Cause Solution Mouse may need repair. See the Worldwide Limited Warranty for terms and conditions. Computer is in Sleep state. Press the power button to resume from Sleep state.

CAUTION: When attempting to resume from Sleep state, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data.

Mouse will only move vertically, horizontally, or movement is jerky. Cause Solution

Mouse roller ball or the rotating encoder shafts that make contact with the ball are dirty.

Remove roller ball cover from the bottom of the mouse and clean the internal components with a mouse cleaning kit available from most computer stores.

Solving hardware installation problems

You may need to reconfigure the computer when you add or remove hardware, such as an additional drive or expansion card. If you install a plug and play device, Windows automatically recognizes the device and configures the computer. If you install a non-plug and play device, you must reconfigure the computer after completing installation of the new hardware. In Windows, use the Add Hardware Wizard and follow the instructions that appear on the screen.

To open the Add Hardware Wizard, open a Command Prompt and open hdwwiz.exe. WARNING! When the computer is plugged into an AC power source, voltage is always applied to the system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the wall outlet and allow the internal system components to cool before touching.

A new device is not recognized as part of the system. Cause Solution Device is not seated or connected properly. Ensure that the device is properly and securely connected and

that pins in the connector are not bent down.

Cable(s) of new external device are loose or power cables are unplugged.

Ensure that all cables are properly and securely connected and that pins in the cable or connector are not bent down.

Power switch of new external device is not turned on. Turn off the computer, turn on the external device, then turn on the computer to integrate the device with the computer system.

When the system advised you of changes to the configuration, you did not accept them.

A plug and play board may not automatically configure when added if the default configuration conflicts with other devices.

Reboot the computer and follow the instructions for accepting the changes.

Use Windows Device Manager to deselect the automatic settings for the board and choose a basic configuration that does not cause a resource conflict. You can also use Computer Setup to reconfigure or disable devices to resolve the resource conflict.

####### Solving hardware installation problems 97

A new device is not recognized as part of the system. Cause Solution

To access Device Manager in Windows 10, type device manager in the taskbar search box, and then select Device Manager from the list of applications.

USB ports on the computer are disabled in Computer Setup. Run the Computer Setup utility and ensure that Device available is selected for appropriate USB ports under Advanced > Port Options.

Computer will not start. Cause Solution

Wrong memory modules were used in the upgrade or memory modules were installed in the wrong location.

NOTE: DIMM1 or XMM1 must always be installed. DIMM1 must be installed before DIMM2, and DIMM3 must be installed before DIMM4.

Power LED flashes Red three times and then white two times. Cause Solution Memory is installed incorrectly or is bad. CAUTION: To avoid damage to the DIMMs or the system board,

you must unplug the computer power cord before attempting to reseat, install, or remove a DIMM module.

NOTE: DIMM1 or XMM1 must always be installed. DIMM1 must be installed before DIMM2, and DIMM3 must be installed before DIMM4

Solving network problems

Some common causes and solutions for network problems are listed in the following table. These guidelines do not discuss the process of debugging the network cabling.

Network driver does not detect network controller. Cause Solution Network controller is disabled. 1. Run Computer Setup and enable network controller.

Incorrect network driver. Check the network controller documentation for the correct driver or obtain the latest driver from the manufacturer’s Web site.

Network status link light never flashes. NOTE: The network status light is supposed to flash when there is network activity. Cause Solution No active network is detected. Check cabling and network equipment for proper connection. Network controller is not set up properly. Check for the device status within Windows, such as Device

Manager for driver load and the Network Connections applet within Windows for link status.

To access Device Manager in Windows 10, type device manager in the taskbar search box, and then select Device Manager from the list of applications.

Network controller is disabled. 1. Run Computer Setup and enable network controller.

Network driver is not properly loaded. Reinstall network drivers. System cannot autosense the network. Disable auto-sensing capabilities and force the system into the

correct operating mode.

Diagnostics reports a failure. Cause Solution The cable is not securely connected. Ensure that the cable is securely attached to the network

connector and that the other end of the cable is securely attached to the correct device.

The cable is attached to the incorrect connector. Ensure that the cable is attached to the correct connector. There is a problem with the cable or a device at the other end of the cable.

Ensure that the cable and device at the other end are operating correctly.

The network controller is defective. Contact an authorized service provider.

Solving network problems 99

Diagnostics passes, but the computer does not communicate with the network. Cause Solution

Network drivers are not loaded, or driver parameters do not match current configuration.

Make sure the network drivers are loaded and that the driver parameters match the configuration of the network controller.

Make sure the correct network client and protocol is installed.

The network controller is not configured for this computer. Select the Network and Sharing Center icon in the Control Panel and configure the network controller. To access Control Panel in Windows 10, type control panel in the taskbar search box, and then select Control Panel from the list of applications.

Network controller stopped working when an expansion board was added to the computer. Cause Solution The network controller requires drivers. Verify that the drivers were not accidentally deleted when the

drivers for a new expansion board were installed.

Network controller stops working without apparent cause. Cause Solution The cable is not securely connected. Ensure that the cable is securely attached to the network

connector and that the other end of the cable is securely attached to the correct device.

The network controller is defective. Contact an authorized service provider.

New network card will not boot. Cause Solution

New network card may be defective or may not meet industrystandard specifications.

Install a working, industry-standard NIC, or change the boot sequence to boot from another source.

Cannot connect to network server when attempting Remote System Installation. Cause Solution The network controller is not configured properly. Verify Network Connectivity, that a DHCP Server is present, and

that the Remote System Installation Server contains the NIC drivers for your NIC.

######### System setup utility reports unprogrammed EEPROM. Cause Solution Unprogrammed EEPROM. Contact an authorized service provider.

Solving memory problems If you encounter memory problems, some common causes and solutions are listed in the following table. CAUTION: Power may still be supplied to the DIMMs when the computer is turned off (depending on the Management Engine (ME) settings). To avoid damage to the DIMMs or the system board, you must unplug the computer power cord before attempting to reseat, install, or remove a memory module. For those systems that support ECC memory, HP does not support mixing ECC and non-ECC memory. Otherwise, the computer will not boot the operating system. NOTE: The memory count will be affected by configurations with the Management Engine (ME) enabled. The ME uses 8MB of system memory in single channel mode or 16MB of memory in dual-channel mode to download, decompress, and execute the ME firmware for Out-of-Band (OOB), third-party data storage, and other management functions.

| | |---|

System will not boot or does not function properly after installing additional memory modules. Cause Solution A memory module is not installed in the DIMM1 or XMM1 socket. Ensure that a memory module is installed in the DIMM1 or XMM1

socket on the system board. This socket must be populated with a memory module.

Memory module is not the correct type or speed grade for the system or the new memory module is not seated properly.

Replace module with the correct industry-standard device for the computer. On some models, ECC and non-ECC memory modules cannot be mixed.

Out of memory error. Cause Solution You have run out of memory to run the application. Check the application documentation to determine the memory

requirements.

Memory count during POST is wrong. Cause Solution The memory modules may not be installed correctly. Check that the memory modules have been installed correctly and

that proper modules are used. Integrated graphics may use system memory. No action required.

Insufficient memory error during operation. Cause Solution

Too many Terminate and Stay Resident programs (TSRs) are installed.

Delete any TSRs that you do not need.

You have run out of memory for the application. Check the memory requirements for the application or add more memory to the computer.

Solving memory problems 101

######### Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.)

Cause Solution Memory is installed incorrectly or is bad. 1. Reseat DIMMs. Power on the system.

Solving CD-ROM and DVD problems

If you encounter CD-ROM or DVD problems, see the common causes and solutions listed in the following table or to the documentation that came with the optional device.

System will not boot from CD-ROM or DVD drive. Cause Solution

The device is attached to a SATA port that has been hidden in the Computer Setup utility.

Run the Computer Setup utility and ensure Device Available is selected for the device's SATA port in Advanced > Port Options.

Removable Media Boot is disabled in the Computer Setup utility. Run the Computer Setup utility and enable booting to removable media in Advanced > Boot Options.

Network Boot is enabled in Computer Setup. Run the Computer Setup utility and disable Network Boot in

Advanced > Boot Options. Non-bootable CD in drive. Try a bootable CD in the drive. Boot order not correct. Run the Computer Setup utility and change boot sequence in

######### Advanced > Boot Options.

Drive not found (identified). Cause Solution Cable could be loose. Check cable connections. The system may not have automatically recognized a newly installed device.

See reconfiguration directions in the Solving hardware installation problems on page 97 section. If the system still does not recognize the new device, check to see if the device is listed within Computer Setup. If it is listed, the probable cause is a driver problem. If it is not listed, the probable cause is a hardware problem.

If this is a newly installed drive, run the Computer Setup utility and try adding a POST delay under Advanced > Power-On Options.

The device is attached to a SATA port that has been hidden in Computer Setup.

Run the Computer Setup utility and ensure Device Available is selected for the device's SATA port in Advanced > Port Options.

Drive responds slowly immediately after power-up. Run Computer Setup and increase the POST Delay in Advanced >

######### Power-On Options.

CD-ROM or DVD devices are not detected or driver is not loaded. Cause Solution Drive is not connected properly or not properly configured. See the documentation that came with the optional device.

Movie will not play in the DVD drive. Cause Solution Movie may be regionalized for a different country. See the documentation that came with the DVD drive. Decoder software is not installed. Install decoder software. Damaged media. Replace media. Movie rating locked out by parental lock. Use DVD software to remove parental lock. Media installed upside down. Reinstall media.

Cannot eject compact disc (tray-load unit). Cause Solution Disc not properly seated in the drive. Turn off the computer and insert a thin metal rod into the

emergency eject hole and push firmly. Slowly pull the tray out from the drive until the tray is fully extended, then remove the disc.

CD-ROM, CD-RW, DVD-ROM, or DVD-R/RW drive cannot read a disc or takes too long to start. Cause Solution Media is corrupt. Try different media to confirm whether media is valid. Media has been inserted upside down. Re-insert the media with the label facing up. The DVD-ROM drive takes longer to start because it has to determine the type of media played, such as audio or video.

Wait at least 30 seconds to let the DVD-ROM drive determine the type of media being played. If the disc still does not start, read the other solutions listed for this topic.

CD or DVD disc is dirty. Clean CD or DVD with a CD cleaning kit, available from most computer stores.

Windows does not detect the CD-ROM or DVD-ROM drive. 1. Use Device Manager to remove or uninstall the device.

To access Device Manager in Windows 10, type device manager in the taskbar search box, and then select Device Manager from the list of applications.

driver.

Solving CD-ROM and DVD problems 103

Recording or copying CDs is difficult or impossible. Cause Solution Wrong or poor quality media type. 1. Try using a slower speed when recording.

Solving USB flash drive problems

If you encounter USB flash drive problems, common causes and solutions are listed in the following table. USB flash drive is not seen as a drive letter in Windows. Cause Solution The drive letter after the last physical drive is not available. Change the default drive letter for the flash drive in Windows.

USB flash drive not found (identified). Cause Solution

The device is attached to a USB port that has been hidden in Computer Setup.

Run the Computer Setup utility and enable USB ports in Advanced > Port Options.

The device was not properly seated before power-up. Ensure the device is fully inserted into the USB port before applying power to the system

System will not boot from USB flash drive. Cause Solution Boot order is not correct. Run the Computer Setup utility and change boot sequence in

######### Advanced > Boot Options.

Removable Media Boot is disabled in the Computer Setup utility. Run the Computer Setup utility and enable booting to removable media in Advanced > Boot Options. Ensure USB is enabled in Storage > Boot Order.

The computer boots to DOS after making a bootable flash drive. Cause Solution Flash drive is bootable. Install the flash drive only after the operating system boots. Flash drive is defective. Try a different flash drive.

Solving front panel component problems

If you encounter problems with devices connected to the front panel, refer to the common causes and solutions listed in the following table.

A USB device, headphone, or microphone is not recognized by the computer. Cause Solution Device is not properly connected. 1. Turn off the computer.

restart the computer. The device does not have power. If the USB device requires AC power, be sure one end is connected

to the device and one end is connected to a live outlet. The correct device driver is not installed. 1. Install the correct driver for the device.

USB ports on the computer are disabled in Computer Setup. Run the Computer Setup utility and ensure that the USB ports are set to Enabled in Security > USB Security.

Solving Internet access problems

If you encounter Internet access problems, consult your Internet Service Provider (ISP) or refer to the common causes and solutions listed in the following table.

Unable to connect to the Internet. Cause Solution Internet Service Provider (ISP) account is not set up properly. Verify Internet settings or contact your ISP for assistance. Web browser is not set up properly. Verify that the Web browser is installed and set up to work with

your ISP. Cable/DSL modem is not plugged in. Plug in cable/DSL modem. You should see a “power” LED light on the front of the cable/DSL modem.

Cable/DSL service is not available or has been interrupted due to bad weather.

Try connecting to the Internet at a later time or contact your ISP. (If the cable/DSL service is connected, the “cable” LED light on the front of the cable/DSL modem will be on.)

The CAT5 UTP cable is disconnected. Connect the CAT5 UTP cable between the cable modem and the computers’s RJ-45 connector. (If the connection is good, the “PC” LED light on the front of the cable/DSL modem will be on.)

IP address is not configured properly. Contact your ISP for the correct IP address. Cookies are corrupted. (A “cookie” is a small piece of information that a Web server can store temporarily with the Web browser. This is useful for having the browser remember some specific information that the Web server can later retrieve.)

Windows 10:

select Control Panel from the list of applications.

Solving front panel component problems 105

Unable to connect to the Internet. Cause Solution

Cannot automatically launch Internet programs. Cause Solution You must log on to your ISP before some programs will start. Log on to your ISP and launch the desired program.

Solving software problems

Most software problems occur as a result of the following:

If you encounter software problems, see the applicable solutions listed in the following table. Computer will not continue and the HP logo does not display. Cause Solution ROM issue - POST error has occurred. Observe the beeps and LED lights on the front of the computer.

See POST error messages and diagnostic front panel LEDs and audible codes on page 107 to determine possible causes.

See the Worldwide Limited Warranty for terms and conditions.

“Illegal Operation has Occurred” error message is displayed. Cause Solution

Software being used is not Microsoft-certified for your version of Windows.

Verify that the software is certified by Microsoft for your version of Windows (see program packaging for this information).

Configuration files are corrupt. If possible, save all data, close all programs, and restart the computer.

7 POST error messages and diagnostic front panel LEDs and audible codes

This appendix lists the error codes, error messages, and the various indicator light and audible sequences that you may encounter during Power-On Self-Test (POST) or computer restart, the probable source of the problem, and steps you can take to resolve the error condition.

POST Message Disabled suppresses most system messages during POST, such as memory count and nonerror text messages. If a POST error occurs, the screen will display the error message. To manually switch to the POST Messages Enabled mode during POST, press any key (except F10, F11, or F12). The default mode is POST Message Disabled.

The speed at which the computer loads the operating system and the extent to which it is tested are determined by the POST mode selection.

Quick Boot is a fast startup process that does not run all of the system level tests, such as the memory test. Full Boot runs all of the ROM-based system tests and takes longer to complete.

Full Boot may also be enabled to run every 1 to 30 days on a regularly scheduled basis. To establish the schedule, reconfigure the computer to the Full Boot Every x Days mode, using Computer Setup.

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NOTE: For more information on Computer Setup, see Computer Setup (F10) Utility on page 66.

POST numeric codes and text messages

This section covers those POST errors that have numeric codes associated with them. The section also includes some text messages that may be encountered during POST.

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NOTE: The computer will beep once after a POST text message is displayed on the screen.

Control panel message Description Recommended action

005-Real-Time Clock Power Loss Invalid time or date in configuration memory. Reset the date and time under Control Panel (Computer Setup can also be used). If the

RTC (real-time clock) battery may need to be replaced.

problem persists, replace the RTC battery. See the Removal and Replacement section for instructions on installing a new battery.

Memory error during POST execution of the Management Engine (ME) BIOS Extensions option ROM.

Use Computer Setup to update this information.

Memory error during POST execution of the Management Engine (ME) BIOS Extensions option ROM.

100-Front Audio Not Connected Front audio cable has been detached or unseated from system board.

Reconnect or replace front audio cable.

The system memory size is different from the last startup. The most common reason is the removal of memory from the system board. Press the F1 key to save the memory changes. If this message persists, verify that the memory modules are installed correctly.

A memory module in memory socket identified in the error message is missing critical SPD information, or is incompatible with the chipset.

Rearrange the DIMMs so that each channel has the same amount of memory.

Recently added memory module(s) support ECC memory error correction.

2E6–Memory Not Configured Correctly for Proper MEBx Execution

DIMM1 is not installed. Make sure there is a memory module in the

DIMM1 socket and that it is properly seated. 300–Configuration Change Warning The storage device configuration will be

Not applicable

updated as shown.

Hard drive is about to fail. (Some hard drives have a hard drive firmware patch that will fix an erroneous error message.)

Hard drive is about to fail. (Some hard drives have a hard drive firmware patch that will fix an erroneous error message.)

309 – 30C: Hard Disk 3–6: SMART Hard Drive Detects Imminent Failure

Hard drive is about to fail. (Some hard drives have a hard drive firmware patch that will fix an erroneous error message.)

419-Out of Memory Space for Option ROMs Recently added PCI expansion card contains an option ROM too large to download during POST.

▲ If a PCI expansion card was recently added, remove it to see if the problem remains.

Reconnect or replace front USB cable.

There is an incompatibility or problem with a PCIe device and the system or PCIe link could not be configured to a valid bus width or speed.

Try rebooting the system. If the error reoccurs, the device may not work with this system

Install cable between I2C on card and USB-C on the system board.

More than one USB type-C card is installed. Remove USB type-C card so only one is

installed. 500–BIOS Recovery A system BIOS recovery has occurred. Not applicable. 70x-Wireless Mode Not Supported The system has detected a wireless module

Replace with a supported module.

installed in the system that is not supported and has been disabled.

Chassis, rear chassis, or front chassis fan is not connected or may have malfunctioned.

N/A

Ensure SATA connectors are used in ascending order. For one device, use SATA 0. For two devices, use SATA 0 and SATA 1. For three devices, use SATA 0, SATA 1, and SATA 2.

90B-Fan Failure The system has detected that a cooling fan is not operating correctly.

Make sure system has proper airflow.

Interpreting system validation diagnostic front panel LEDs and audible codes

During the system validation phase that occurs at system startup, the BIOS validates the functionality of the following subsystems and conditions:

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If an error is detected, specific patterns of long and short blinks, accompanied by long and short beeps (where applicable) are used to identify the error. These patterns will make up a two part code:

Number of long beeps/blinks Error category

Patterns of blink/beep codes are determined by using the following parameters:

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The red LED blinks to represent the major error category (long blinks). The white LED blinks to represent the minor error category (short blinks). For example, ‘3.5’ indicates 3 long red blinks and 5 short white blinks to communicate the processor is not detected.

Category Major/minor code Description BIOS 2.2 The main area (DXE) of BIOS has become corrupted and there is no recovery

binary image available.

Hardware 3.2 The embedded controller has timed out waiting for BIOS to return from memory initialization.

Thermal 4.2 A processor over temperature condition has been detected.*

System board 5.2 The embedded controller cannot find valid firmware.

Interpreting system validation diagnostic front panel LEDs and audible codes 113

8 Password security and resetting CMOS

This computer supports security password features, which can be established through the Computer Setup Utilities menu.

This computer supports two security password features that are established through the Computer Setup Utilities menu: administrator password and power-on password. When you establish only an administrator password, any user can access all the information on the computer except Computer Setup. When you establish only a power-on password, the power-on password is required to access Computer Setup and any other information on the computer. When you establish both passwords, only the administrator password will give you access to Computer Setup.

When both passwords are set, the administrator password can also be used in place of the power-on password as an override to log in to the computer. This is a useful feature for a network administrator.

If you forget one or both passwords, you can clear all passwords by powering off the system, opening the cover, temporarily removing the PSWD jumper, and booting once. This will erase the administrator and power-on passwords. You must restore the jumper to create new passwords.

CAUTION: Pushing the CMOS button with power removed will reset the BIOS settings to factory defaults. It may be useful to back up the BIOS settings or save them as custom defaults before resetting them in case they are needed later. Back up can be performed in Computer Setup or using the BiosConfigUtility tool available from www.hp.com. See Computer Setup (F10) Utility on page 66 for information on backing up the BIOS settings.

Resetting the password jumper

CAUTION: Stringent security is a mode where there is no physical bypass of the password function. If enabled, removing the password jumper will be ignored. To enable this mode, change the security setting Clear Password Jumper in Password Policies to Ignore.

If you lose or forget the password when in stringent security mode, the system can only be reset by System Management Command. This is a way for HP Service and Support to provide a secure method to access the BIOS and command a password reset for a specifically identified unit under the direction of the owner. This scenario may not be covered under warranty.

To prevent needing a customer service event to restore access to the system, record your configured administrator and power-on passwords in a safe place away from your computer.

To disable the power-on or administrator password features, or to clear the power-on or administrator passwords, complete the following steps:

WARNING! To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the wall outlet, and allow the internal system components to cool before touching.

CAUTION: When the computer is plugged in, the power supply always has voltage applied to the system board even when the unit is turned off. Failure to disconnect the power cord can result in damage to the system.

Static electricity can damage the electronic components of the computer or optional equipment. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. See the Safety & Regulatory Information guide for more information.

NOTE: The password jumper is green so that it can be easily identified. For assistance locating the password jumper and other system board components, see the system board components image at System board callouts on page 64.

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Resetting the password jumper 115

Clearing and resetting the BIOS

The CMOS button resets BIOS settings to default, but does not clear the passwords or affect any of the other Security settings. On Intel systems with advanced manageability features, the CMOS button will also partially unprovision AMT.

WARNING! To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the wall outlet, and allow the internal system components to cool before touching.

CAUTION: When the computer is plugged in, the power supply always has voltage applied to the system board even when the unit is turned off. Failure to disconnect the power cord can result in damage to the system.

Static electricity can damage the electronic components of the computer or optional equipment. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. See the Safety & Regulatory Information guide for more information.

CAUTION: Pushing the CMOS button will reset CMOS values to factory defaults. It is important to back up the computer CMOS settings before resetting them in case they are needed later. Back up is easily done through Computer Setup. See Computer Setup (F10) Utility on page 66 for information on backing up the CMOS settings.

NOTE: Make sure you have disconnected the AC power cord from the wall outlet. The CMOS button will not clear CMOS if the power cord is connected.


NOTE: For assistance locating the CMOS button and other system board components, see the system board components image at System board callouts on page 64.

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NOTE: You will receive POST error messages after clearing CMOS and rebooting advising you that configuration changes have occurred. Use Computer Setup to reset any special system setups along with the date and time.

For instructions on Computer Setup, see Computer Setup (F10) Utility on page 66.

9 Using HP PC Hardware Diagnostics

Using HP PC Hardware Diagnostics Windows

HP PC Hardware Diagnostics Windows is a Windows-based utility that allows you to run diagnostic tests to determine whether the computer hardware is functioning properly. The tool runs within the Windows operating system in order to diagnose hardware failures.

If HP PC Hardware Diagnostics Windows is not installed on your computer, first you must download and install it. To download HP PC Hardware Diagnostics Windows, see Downloading HP PC Hardware Diagnostics Windows on page 117.

After HP PC Hardware Diagnostics Windows is installed, follow these steps to access it from HP Help and Support or HP Support Assistant.

b. Right-click HP PC Hardware Diagnostics Windows, select More, and then select Run as administrator.

– or – To access HP PC Hardware Diagnostics Windows from HP Support Assistant:

– or – Select the question mark icon in the taskbar.

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#### Downloading HP PC Hardware Diagnostics Windows

Using HP PC Hardware Diagnostics Windows 117

##### Downloading the latest HP PC Hardware Diagnostics Windows version

To download HP PC Hardware Diagnostics Windows, follow these steps:

– or – To run the tool from a USB flash drive, download it to a USB flash drive.

##### Downloading HP Hardware Diagnostics Windows by product name or number (select products only)

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NOTE: For some products, it may be necessary to download the software to a USB flash drive by using the product name or number. To download HP PC Hardware Diagnostics Windows by product name or number (select products only), follow these steps:

– or – To run the tool from a USB flash drive, download it to a USB flash drive.

#### Installing HP PC Hardware Diagnostics Windows

To install HP PC Hardware Diagnostics Windows, follow these steps:

▲ Navigate to the folder on your computer or the flash drive where the .exe file was downloaded, double-

click the .exe file, and then follow the on-screen instructions.

Using HP PC Hardware Diagnostics UEFI

HP PC Hardware Diagnostics UEFI (Unified Extensible Firmware Interface) allows you to run diagnostic tests to determine whether the computer hardware is functioning properly. The tool runs outside the operating system so that it can isolate hardware failures from issues that are caused by the operating system or other software components.

If your PC will not boot into Windows, you can use HP PC Hardware Diagnostics UEFI to diagnose hardware issues.

When HP PC Hardware Diagnostics UEFI detects a failure that requires hardware replacement, a 24-digit Failure ID code is generated. For assistance in correcting the problem, contact support, and provide the Failure ID code.

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NOTE: To start diagnostics on a convertible computer, your computer must be in notebook mode, and you must use the attached keyboard.

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NOTE: If you need to stop a diagnostic test, press esc.

#### Starting HP PC Hardware Diagnostics UEFI

To start HP PC Hardware Diagnostics UEFI, follow these steps:

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#### Downloading HP PC Hardware Diagnostics UEFI to a USB flash drive

Downloading HP PC Hardware Diagnostics UEFI to a USB flash drive can be useful in the following situations:

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NOTE: The HP PC Hardware Diagnostics UEFI download instructions are provided in English only, and you must use a Windows computer to download and create the HP UEFI support environment because only .exe files are provided.

##### Downloading the latest HP PC Hardware Diagnostics UEFI version

To download the latest HP PC Hardware Diagnostics UEFI version to a USB flash drive:

##### Downloading HP PC Hardware Diagnostics UEFI by product name or number (select products only)

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NOTE: For some products, it may be necessary to download the software to a USB flash drive by using the product name or number. To download HP PC Hardware Diagnostics UEFI by product name or number (select products only) to a USB flash drive:

Using HP PC Hardware Diagnostics UEFI 119

Using Remote HP PC Hardware Diagnostics UEFI settings (select products only)

Remote HP PC Hardware Diagnostics UEFI is a firmware (BIOS) feature that downloads HP PC Hardware Diagnostics UEFI to your computer. It can then execute the diagnostics on your computer, and it may upload results to a preconfigured server. For more information on Remote HP PC Hardware Diagnostics UEFI, go to http://www.hp.com/go/techcenter/pcdiags, and then select Find out more.

#### Downloading Remote HP PC Hardware Diagnostics UEFI

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NOTE: HP Remote PC Hardware Diagnostics UEFI is also available as a Softpaq that can be downloaded to a server.

##### Downloading the latest Remote HP PC Hardware Diagnostics UEFI version

To download the latest Remote HP PC Hardware Diagnostics UEFI version, follow these steps:

Downloading Remote HP PC Hardware Diagnostics UEFI by product name or number NOTE: For some products, it may be necessary to download the software by using the product name or number. To download HP Remote PC Hardware Diagnostics UEFI by product name or number, follow these steps:

| | |---|

#### Customizing Remote HP PC Hardware Diagnostics UEFI settings

Using the Remote HP PC Hardware Diagnostics setting in Computer Setup (BIOS), you can perform the following customizations:

Using Remote HP PC Hardware Diagnostics UEFI settings (select products only) 121

A Battery replacement

The battery installed on the computer provides power to the real-time clock. When replacing the battery, use a battery equivalent to the battery originally installed on the computer. The computer has a 3-volt lithium coin cell battery installed.

WARNING! The computer contains an internal lithium manganese dioxide battery. There is a risk of fire and burns if the battery is not handled properly. To reduce the risk of personal injury: Do not attempt to recharge the battery. Do not expose to temperatures higher than 60°C (140ºF). Do not disassemble, crush, puncture, short external contacts, or dispose of in fire or water. Replace the battery only with the HP spare designated for this product. CAUTION: Before replacing the battery, it is important to back up the computer CMOS settings. When the battery is removed or replaced, the CMOS settings will be cleared. Static electricity can damage the electronic components of the computer or optional equipment. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. NOTE: The lifetime of the lithium battery can be extended by plugging the computer into a live AC wall socket. The lithium battery is only used when the computer is NOT connected to AC power. HP encourages customers to recycle used electronic hardware, HP original print cartridges, and rechargeable batteries. For more information about recycling programs, go to http://www.hp.com/recycle.

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CAUTION: Regardless of the power-on state, voltage is always present on the system board as long as the system is plugged into an active AC outlet. You must disconnect the power cord to avoid damage to the internal components of the computer.

NOTE: On some computer models, it may be necessary to remove an internal component to gain access to the battery.

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###### Type 1


###### Type 2


###### Type 3

123


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NOTE: After the battery has been replaced, use the following steps to complete this procedure.

B Power cord set requirements

The power supplies on some computers have external power switches. The voltage select switch feature on the computer permits it to operate from any line voltage between 100-120 or 220-240 volts AC. Power supplies on those computers that do not have external power switches are equipped with internal switches that sense the incoming voltage and automatically switch to the proper voltage.

The power cord set received with the computer meets the requirements for use in the country where you purchased the equipment.

Power cord sets for use in other countries must meet the requirements of the country where you use the computer.

General Requirements

The requirements listed below are applicable to all countries:

The power cord should be routed so that it is not likely to be walked on or pinched by items placed upon it or against it. Particular attention should be paid to the plug, electrical outlet, and the point where the cord exits from the product.

WARNING! Do not operate this product with a damaged power cord set. If the power cord set is damaged in any manner, replace it immediately.

Japanese Power Cord Requirements For use in Japan, use only the power cord received with this product. CAUTION: Do not use the power cord received with this product on any other products.

General Requirements 125

Country-Specific Requirements

Additional requirements specific to a country are shown in parentheses and explained below.

Country Accrediting Agency Country Accrediting Agency Australia (1) Austria (1) Belgium (1) Canada (2)

EANSW OVE CEBC CSA

Italy (1) Japan (3) Norway (1) Sweden (1)

IMQ METI NEMKO SEMKO

Denmark (1) Finland (1) France (1) Germany (1)

DEMKO SETI UTE VDE

Switzerland (1) United Kingdom (1) United States (2)

SEV BSI UL

Dentori Law. Flexible cord must be Type VCT or VCTF, 3-conductor, 0.75 mm2 conductor size. Wall plug must be a two-pole grounding type with a Japanese Industrial Standard C8303 (7A, 125V) configuration.

126 Appendix B Power cord set requirements

C Statement of memory volatility

The purpose of this chapter is to provide general information regarding nonvolatile memory in HP Business computers. This chapter also provides general instructions for restoring nonvolatile memory that can contain personal data after the system has been powered off and the hard drive has been removed.

HP Business computer products that use Intel®-based or AMD®-based system boards contain volatile DDR memory. The amount of nonvolatile memory present in the system depends upon the system configuration. Intel-based and AMD-based system boards contain nonvolatile memory subcomponents as originally shipped from HP, assuming that no subsequent modifications have been made to the system and assuming that no applications, features, or functionality have been added to or installed on the system.

Following system shutdown and removal of all power sources from an HP Business computer system, personal data can remain on volatile system memory (DIMMs) for a finite period of time and will also remain in nonvolatile memory. Use the steps below to remove personal data from the computer, including the nonvolatile memory found in Intel-based and AMD-based system boards.

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NOTE: If your tablet has a keyboard base, connect to the keyboard base before beginning steps in this chapter.

###### Current BIOS steps

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127

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– or –

– or –

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IMPORTANT: If you clear data using Secure Erase, it cannot be recovered.

Nonvolatile memory usage

Nonvolatile Memory Type Amount (Size)

Does this memory store customer data?

Does this memory retain data when power is removed?

What is the purpose of this memory?

How is data input into this memory?

How is this memory write-protected?

HP Sure Start flash (select models only)

8 MBytes No Yes Provides protected backup of critical System BIOS code, EC firmware, and critical computer configuration data for select platforms that support HP Sure Start.

For more information, see Using HP Sure Start (select models only) on page 132.

Real Time Clock (RTC) battery backed-up CMOS configuration memory

Controller (NIC) EEPROM

256 Bytes No Yes Stores system date and time and noncritical data.

64 KBytes (not customer accessible)

No Yes Stores NIC configuration and NIC firmware.

DIMM Serial Presence Detect (SPD) configuration data

256 Bytes per memory module, 128 Bytes programmable (not customer accessible)

No Yes Stores memory module information.

System BIOS 9 MBytes Yes Yes Stores system BIOS code and computer configuration data.

Data cannot be written to this device via the host processor. The content is managed solely by the HP Sure Start Embedded Controller.

This memory is protected by the HP Sure Start Embedded Controller.

RTC battery backed-up CMOS is programmed using the Computer Setup (BIOS), or changing the Microsoft Windows date & time.

NIC EEPROM is programmed using a utility from the NIC vendor that can be run from DOS.

DIMM SPD is programmed by the memory vendor.

This memory is not writeprotected.

A utility is required to write data to this memory and is available from the NIC vendor. Writing data to this ROM in an inappropriate manner will render the NIC nonfunctional.

Data cannot be written to this memory when the module is installed in a computer. The specific write-protection method varies by memory vendor.

System BIOS code is programmed at the factory. Code is updated when the system BIOS is updated. Configuration data and settings are input using the Computer Setup (BIOS) or a custom utility.

NOTE: Writing data to this ROM in an inappropriate manner can render the computer nonfunctional.

A utility is required for writing data to this memory and is available on the HP website; go to http://www.hp.com/ support. Select Find your

Nonvolatile memory usage 129

Nonvolatile Memory Type Amount (Size)

Does this memory store customer data?

Does this memory retain data when power is removed?

What is the purpose of this memory?

How is data input into this memory?

How is this memory write-protected?

Intel Management Engine Firmware (present only in select Elite or Z models. For more information, go to http://www.hp.com/ support. Select Find your product, and then follow the onscreen instructions.)

1.5 MBytes or 7 MBytes

Yes Yes Stores Management Engine Code, Settings, Provisioning Data and iAMT third-party data store.

Management Engine Code is programmed at the factory. Code is updated via Intel secure firmware update utility. Unique Provisioning Data can be entered at the factory or by an administrator using the Management Engine (MEBx) setup utility. The third party data store contents can be populated by a remote management console or local applications that have been registered by an administrator to have access to the space.

Bluetooth flash (select products only)

2 Mbit No Yes Stores Bluetooth configuration and firmware.

Bluetooth flash is programmed at the factory. Tools for writing data to this memory are not publicly available but can be obtained from the silicon vendor.

802.11 WLAN EEPROM

4 Kbit to 8 Kbit No Yes Stores configuration and calibration data.

802.11 WLAN EEPROM is programmed at the factory. Tools for writing data to this memory are not made public.

Webcam (select products only)

64 Kbit No Yes Stores webcam configuration and firmware.

Webcam memory is programmed using a utility from the device manufacturer that can be run from Windows.

Fingerprint reader (select products only)

512 KByte flash Yes Yes Stores

fingerprint templates.

Fingerprint reader memory is programmed by user enrollment in HP ProtectTools Security Manager.

product, and then follow the on-screen instructions.

The Intel chipset is configured to enforce hardware protection to block all direct read/write access to this area. An Intel utility is required for updating the firmware. Only firmware updates digitally signed by Intel can be applied using this utility.

A utility is required for writing data to this memory and is made available through newer versions of the driver whenever the flash requires an upgrade.

A utility is required for writing data to this memory and is typically not made available to the public unless a firmware upgrade is necessary to address a unique issue.

A utility is required for writing data to this memory and is typically not made available to the public unless a firmware upgrade is necessary to address a unique issue.

Only a digitally signed application can make the call to write to the flash.

Questions and answers

IMPORTANT: Restore defaults does not securely erase any data on your hard drive. See question and answer 6 for steps to securely erase data. Restore defaults does not reset the Custom Secure Boot keys. See question and answer 7 for information about resetting the keys.

The Unified Extensible Firmware Interface (UEFI) BIOS is an industry-standard software interface between the platform firmware and an operating system (OS). It is a replacement for the older BIOS architecture, but supports much of the legacy BIOS functionality.

Like the legacy BIOS, the UEFI BIOS provides an interface to display the system information and configuration settings and to change the configuration of your computer before an OS is loaded. BIOS provides a secure run-time environment that supports a Graphic User Interface (GUI). In this environment, you can use either a pointing device (Touchscreen, TouchPad, pointing stick, or USB mouse) or the keyboard to navigate and make menu and configuration selections. The UEFI BIOS also contains basic system diagnostics.

The UEFI BIOS provides functionality beyond that of the legacy BIOS. In addition, the UEFI BIOS works to initialize the computer’s hardware before loading and executing the OS; the run-time environment allows the loading and execution of software programs from storage devices to provide more functionality, such as advanced hardware diagnostics (with the ability to display more detailed system information) and advanced firmware management and recovery software.

HP has provided options in Computer Setup (BIOS) to allow you to run in legacy BIOS, if required by the operating system. Examples of this requirement would be if you upgrade or downgrade the OS.

The DIMM SPD memory contains information about the memory module, such as size, serial number, data width, speed/timing, voltage, and thermal information. This information is written by the module manufacturer and stored on an EEPROM. This EEPROM cannot be written to when the memory module is installed in a computer. Third-party tools do exist that can write to the EEPROM when the memory module is not installed in a computer. Various third-party tools are available to read SPD memory.

This message relates to clearing the Real Time Clock (RTC) CMOS memory that contains computer configuration data.

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Questions and answers 131

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IMPORTANT: Resetting will result in the loss of information.

These steps will not reset Custom Secure Boot Keys. See question and answer 7 for information about resetting the keys.

###### 7. How can the Custom Secure Boot Keys be reset?

Secure Boot is a feature to ensure that only authenticated code can start on a platform. If you enabled Secure Boot and created Custom Secure Boot Keys, simply disabling Secure Boot will not clear the keys. You must also select to clear the Custom Secure Boot Keys. Use the same Secure Boot access procedure you used to create the Custom Secure Boot Keys, but make the selection to clear or delete all Secure Boot Keys.

Using HP Sure Start (select models only)

Select computer models are configured with HP Sure Start, a technology that continuously monitors your computer's BIOS for attacks or corruption. If the BIOS becomes corrupted or is attacked, HP Sure Start restores the BIOS to its previously safe state, without user intervention. Those select computer models ship with HP Sure Start configured and enabled. HP Sure Start is configured and already enabled so that most users can use the HP Sure Start default configuration. The default configuration can be customized by advanced users.

To access the latest documentation on HP Sure Start, go to http://www.hp.com/support. Select Find your product, and then follow the on-screen instructions.

D Specifications

Item Metric U.S. Dimensions Width 3.94 in 100 mm Depth 13.3 in 338 mm Height 12.13 in 308 mm Weight 19.82 lb 9.00 kg Max supported weight (desktop orientation) 77 lb 35 kg Temperature range Operating 41° to 113°F 5° to 45°C Non-operating -40° to 151°F -40° to 66°C Relative Humidity (at max inlet temperature)

Operating 5-90% 5-90% Non-operating 5-90% 5-90% Maximum altitude

Operating 16,404 ft 5000 m Non-operating 50,000 ft 15,240 m Power supply 80 PLUS Platinum 250W active PFC

Operating voltage range 90-264 VAC Rated voltage range 100-240 VAC Rated line frequency 50-60 Hz Operating line frequency 47-63 Hz Rated input current 250W ≦ 3A DC output +12V

133

Index

illustrated 4 locked 82 removal and replacement 18

administrator password 114 air duct

removal and replacement 51

antennas disconnecting 46 removal and replacement 49

audible codes 112 audio problems 93

disposal 14 battery replacement 122 beep codes 112 BIOS

clearing and resetting 116

booting options Full Boot 107 Quick Boot 107

removal and replacement 48

cautions AC power 9 cables 14 cooling fan 13 electrostatic discharge 9 keyboard cleaning 12 keyboard keys 13

computer 12 mouse 13 safety precautions 12

CMOS

backing up 114 computer cleaning 12

Computer Setup

access problem 81 country power cord set requirements 126 Customer Support 79

rotating 40

drives cable connections 30 installation 30 locations 30

dust filter 21

preventing damage 10

error codes 107, 112 messages 107

expansion card installation 26 removal 26

access problem 81 fan

illustrated 5 removal and replacement 57

fan baffle

illustrated 4, 5 fan sink

illustrated 4, 5 fan, power supply 13 flash drive problems 104 flashing LEDs 112 front bezel

illustrated 6 removal and replacement 19 removing blanks 20 front panel components 2 front panel problems 105

proper handling 14 SATA characteristics 15

hard drive problems 86 hard drives

sizes 6 hardware installation problems 97 heat sink

removal and replacement 54, 58 helpful hints 80 hood lock

removal and replacement 47

HP PC Hardware Diagnostics UEFI downloading 119 starting 119 using 118

HP PC Hardware Diagnostics Windows downloading 117 installing 118 using 117

HP Sure Start 132

2.5-inch hard drive 42 battery 122 drive cables 30 dust filter 21 expansion card 26 M.2 SSD card 44 memory 23 secondary 3.5-inch hard drive

36 slim optical drive 33

Internet access problems 105

K keyboard

cleaning 12 keyboard problems 96

###### M

media card reader problems 88

memory installation 23 nonvolatile 127 problems 101 socket population 23 volatile 127

monitor problems 89 mouse

cleaning 13 problems 96

installation 33 options 7 problems 102 removal 31

option board

optional rear port

overheating, prevention 11

administrator 114 clearing 114 power-on 114

POST error messages 107 power cord set requirements country specific 126 power problems 85

power supply fan 13 illustrated 4 operating voltage range 133 removal and replacement 59

power-on password 114 printer port

illustrated 6 printer problems 95 problems

audio 93 CD-ROM or DVD 102 Computer Setup 81 F10 Setup 81 flash drive 104 front panel 105 general 81 hard drive 86 hardware installation 97 Internet access 105 keyboard 96 Media Card Reader 88 memory 101 monitor 89 mouse 96 network 98 power 85 printer 95 software 106

processors illustrated 5 product ID location 3

R rear panel components 3 Remote HP PC Hardware Diagnostics

UEFI settings customizing 120 using 120

removal and replacement air duct 51 antennas 49 card reader 48 fan 57 front bezel 18, 19 heat sink 54, 58 hood lock 47 optional rear port 53 power supply 59

speaker 60 system board 61

removing 2.5-inch hard drive 41 battery 122 bezel blanks 20 dust filter 21 expansion card 26 M.2 SSD card 44 option board 52 secondary 3.5-inch hard drive

34 slim optical drive 31 removing personal data from volatile system memory 127

resetting CMOS 114 password jumper 114

rotating drive cage 40

S safety and comfort 79 safety precautions

cleaning 12

SATA connectors on system board 15 data cable pinouts 15 hard drive characteristics 15

screws, correct size 13 serial number location 3 service considerations 13 software

problems 106 servicing computer 13

solid-state drives sizes 5, 7

speaker illustrated 4 removal and replacement 60

specifications

computer 133 static electricity 9 system board

illustrated 6 removal and replacement 61 SATA connectors 15

system board connections 22 system memory, removing personal

data from volatile 127

Index 135

T temperature control 11 tools, servicing 13 Torx T15 screwdriver 13 tower orientation 65

disconnecting 46

WLAN module removal 46 spare part number 46