Diagnostic Error Codes; Diagnostic Led Codes - HP xw6400 Service And Technical Reference Manual

Diagnostic error codes

This sections provides an overview of the diagnostic LEDs and error codes that are related to your
workstation.

Diagnostic LED codes

NOTE
The flashing lights and beeps repeat for five cycles. After that, only the flashing lights repeat.
Table 5-2 Diagnostic LED codes
Chassis indicator LEDs
Power LED and sound
activity
None
Blinks red 2 times, once per
second, then 2–second pause,
2 beeps
108 Chapter 5 System diagnostics and troubleshooting
The beeps are heard through the on-board piezo speaker and not the chassis speaker.
Diagnosis and service action
System does not power on. Press the power button. If HDD LED = GREEN, then:
1. Remove expansion cards one at a time.
2. Replace the system board.
OR
Press the power button. If HDD LED does not illuminate, then:
1. Verify that the unit is plugged into a working AC outlet.
2. Open access panel and verify that the power button harness is properly connected
to the inline front panel I/O device assembly connector.
3. Verify that the power supply cables are properly connected to the system board.
4. Verify the power supply functionality.
a. Disconnect AC power.
b. Remove all internal power supply cables from the system board.
c. Plug in AC power.
● If the power supply fan spins and the BIST LED illuminates, then the power
supply is good. Replace the system board.
●
If the power supply fan does not spin or the BIST LED does not illuminate,
replace the power supply.
Thermal shutdown has occurred:
1. Ensure that the workstation air vents are not blocked and the cooling fan is
running.
2. Open the access panel, press power button, and determine whether the processor
fan spins. If it does not spin, ensure the fan cable is plugged into the system board.
Ensure that the fan is properly seated.
3. If the fan is plugged in and seated but not spinning, then replace processor fan.
4. Reseat the CPU heatsink and verify that the fan assembly properly attached.
ENWW