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  • Information
    Information regarding recent vulnerabilities

    HP is aware of the recent vulnerabilities commonly referred to as "Spectre" and "Meltdown". HP has published a security bulletin with patches for these issues and a list of impacted systems. We will continue to update the bulletin as more information becomes available and encourage customers to check the bulletin frequently.

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HP Compaq dc5800 and dc5850 Desktop PC Series - How to Use LED Codes for Hardware Troubleshooting

Information
This document describes the LED codes that can be used for hardware troubleshooting. There are two LED indicators, the red and the green.
Details
System on (normal operation)
Steady green indicator.
Suspend or suspend to RAM mode
Blinks green every two seconds.
Thermal shutdown has occurred
Blinks red 2 times (once per second), then a 2–second pause. Beep stops after 5th iteration.
Processor not installed
Blinks red 3 times (once per second), then a 2-second pause. Beep stops after 5th iteration.
Power failure
Blinks red 4 times (once per second), then a 2-second pause. Beep stops after 5th iteration.
Pre-video memory error
Blinks red 5 times (once per second), then a 2-second pause. Beep stops after 5th iteration.
Pre-video graphics card error
Blinks red 6 times (once per second), then a 2-second pause. Beep stops after the 5th iteration.
System board failure (ROM detected a failure before video)
Blinks red 7 times (once per second), then a 2- second pause. Beep stops after the 5th iteration.
Invalid system ROM (based on bad check sum)
Blinks red 8 times (once per second), then a 2-second pause. Beep stops after 5th iteration.
System power on, but does not boot -
Blinks red 9 times (once per second), then a 2-second pause. Beep stops after 5th iteration.
Bad option card
Blinks red 10 times (once per second), then a 2-second pause. Beep stops after 5th iteration.
System unable to power on
LEDs not on.

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