Diagnostic error codes
This sections provides an overview of the diagnostic lights and error codes that are related to your
Diagnostic light codes
The blinking LEDs and beeps repeat for five cycles. After that, only the blinking LEDs repeat.
Diagnostic LED codes
Power LED and Sound
Blinks red 2 times, once per
second, then 2 second pause, 2
Chapter 5 System diagnostics and troubleshooting
The beeps are heard through the onboard piezo speaker and not the chassis speaker.
System does not power on. Press power button. If HDD LED = GREEN, then:
Remove expansion cards one at a time.
Replace the system board.
Press power button. If HDD LED does not illuminate, then:
Verify that the unit is plugged into a working AC outlet.
Open access panel, and verify that the power button harness is properly connected to the
inline front panel I/O device assembly connector.
Verify that the power supply cables are properly connected to the system board.
Verify the power supply functionality.
Disconnect AC power.
Remove all internal power supply cables from the system board.
Plug in AC power.
If the power supply fan spins and the BIST* LED lights, then the power supply is
good. Replace the system board.
If the power supply fan does not spin or the BIST* LED does not light, replace the
Ensure that the workstation air vents are not blocked and the cooling fan is running.
Open the access panel, press power button, and see if the processor fan spins. If the
processor fan is not spinning, make sure the fan's cable is plugged onto the system board
header. Ensure the fan is fully/properly seated or installed.
If fan is plugged in and seated properly, but is not spinning, the problem may be in the
processor fan. Contact HP for assistance
Verify that the fan assembly is properly attached. If problems persist, there may be a
problem with the processor heatsink. Contact HP for assistance.
Chassis Indicator LEDs
Diagnosis and Service Action