What does it mean when the power button light is flashing red?
A flashing red light on the power button indicates there is a problem with the computer and it is displaying a diagnostic code. You should refer to the Maintenance and Service Guide to interpret the specific code. Under normal operation, the power button light is white when the power is on. (Page 10)
From the official HP Elitedesk 800 G3 Small Form Factor PC manual, page 10
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How do I diagnose problems with my HP EliteDesk 800 G3 when the power light is red?
A flashing red light on the power button indicates there is a problem with the computer and it is displaying a diagnostic code. You should refer to the Maintenance and Service Guide to interpret the specific code. Under normal operation, the power button light is white when the power is on. (Page 10)
Why is my HP EliteDesk 800 G3 power button light flashing red instead of white?
A flashing red light on the power button indicates there is a problem with the computer and it is displaying a diagnostic code. You should refer to the Maintenance and Service Guide to interpret the specific code. Under normal operation, the power button light is white when the power is on. (Page 10)
How can I identify the diagnostic code when my computer's power button shows a red light?
A flashing red light on the power button indicates there is a problem with the computer and it is displaying a diagnostic code. You should refer to the Maintenance and Service Guide to interpret the specific code. Under normal operation, the power button light is white when the power is on. (Page 10)
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