This is the 2016-vintage HP USB-C Docking Station, part number 903765-001 if you're matching firmware revisions or spare PSUs. It's the dock that shipped alongside the EliteBook G3 and ZBook G3 generation as the "single cable to your desk" answer when USB-C with DisplayPort Alt Mode was still new. A lot of these are still in service. The reason 1,400 people search for it monthly is that they're trying to figure out what works with what.
For an accessory, the only question that matters is compatibility. So that's what this page leads with.
Will it work with my laptop?
The dock connects via a single USB-C cable, and what you get out of that connection depends entirely on what your laptop's USB-C port supports. There are two things to check on your laptop's spec sheet:
- DisplayPort Alt Mode over USB-C — required for the dock's HDMI and DisplayPort outputs to work. Without it, you'll get USB hub functionality but no external displays.
- USB-C Power Delivery (PD) — required if you want the dock to charge the laptop. The dock provides power to the laptop only if the laptop supports PD over USB-C.
Both of these were inconsistent in 2016-2018 USB-C laptops. Some had data only. Some had data + DisplayPort. Some had everything. Cables also matter — a USB-C cable that only does USB 2.0 won't carry DisplayPort even if both ends support it. The cable HP shipped with this dock is the right one. If you're using a generic replacement cable, double-check it's a "full-feature" Type-C cable.
If the laptop doesn't do PD, you can still use the dock. You'll just need to charge the laptop separately with its own adapter while the dock handles displays and peripherals.
Setup, in order
Power first, then the laptop. Plug the AC adapter into the dock's power-in connector and into a grounded outlet. Then connect the USB-C cable to your laptop. The order matters because some laptops won't enumerate the dock correctly if it's connected before it has power.
If you're driving external monitors with DisplayLink (HP's software approach for older laptops without DisplayPort Alt Mode, or for adding a third monitor), install the DisplayLink driver before you connect anything. Click the DisplayLink icon in the taskbar after install — Extend makes the external monitor an extension of your primary, Mirror copies it.
Source: pages 6 and 9 of the user guide
Display outputs
The dock has both HDMI and DisplayPort. You can run both simultaneously, with one caveat: each output caps at 2560 × 1600 when both are active. Single-output, you can push higher. The dock supports up to 4K on a single output but the manual hedges on simultaneous 4K — assume one 4K + one 1440p, or two 1440p.
Blu-ray and other HDCP-protected content does not work through the external monitor outputs. If you're trying to play protected video and it's failing, that's not a driver issue — the dock doesn't support HDCP passthrough on this generation. Watch on the laptop's built-in display.
Source: pages 15 and 20 of the user guide
When a USB port stops working
This is the most common support call on this dock. A USB device that draws too much power can disable the port it's plugged into — the dock's power budget is finite, and the firmware shuts down a port that exceeds spec to protect the others.
Two ways to recover. Easier: unplug the offending device, then unplug and replug the dock from the laptop. The ports re-enumerate. More aggressive: power-cycle the dock entirely (pull the AC, wait 10 seconds, plug back in).
If the same port keeps disabling itself with the same device, the device is the problem, not the dock. Powered USB hubs on the dock work for high-draw peripherals — the hub provides its own power, the dock only handles data.
Source: pages 13 and 19 of the user guide
Disconnecting cleanly
Click the Safely Remove Hardware icon (notification area, far right of the taskbar), select USB Docking Station, click Safely Remove. Wait for the system to acknowledge, then unplug the USB-C cable.
You can pull the cable without doing this and Windows usually handles it. But if you're in the middle of writing to a USB drive plugged into the dock, you'll corrupt the drive. The discipline is worth keeping.
Source: page 18 of the user guide
Specs that come up
- Operating temperature: 0°C to 40°C (32°F to 104°F)
- Storage temperature: -20°C to 60°C
- AC power: 100-240V, 50-60Hz
- Document part number: 903765-001 (first edition June 2016)
- Security slot: standard Kensington-compatible cable lock
Source: pages 17 and 22 of the user guide
When to replace it
If the dock is randomly losing display signal, intermittently dropping USB devices that worked yesterday, or running warm to the touch even when idle, the internal power regulation has likely degraded. The 2016 generation is around 8-10 years old now, and replacement is more economical than diagnosis. HP's current docking station lineup uses Thunderbolt 4 and is significantly more capable.
Compatible HP laptops (commonly)
HP laptops contemporary with this 2016 dock that shipped with USB-C ports supporting DisplayPort Alt Mode include the EliteBook 840 G3 and broader 800-series G3 line, and the ZBook 15u G3 and other ZBook G3 mobile workstations. Both have verified USB-C with DisplayPort Alt Mode per HP's QuickSpecs.
If your laptop's USB-C port lacks DisplayPort Alt Mode, the dock works as a USB hub only — DisplayLink can drive displays via software, but with bandwidth and refresh-rate limitations.
