Diagnostic Light Codes - HP xw4100 Service And Technical Reference Manual

5.5.1 diagnostic light codes

chassis indicator lights
power LED and
sound activity
none
Solid GREEN
Power LED.
Solid YELLOW or
ORANGE.
GREEN Power LED
flashes 1 X each
2 seconds.
none
Solid RED LED.
Blinks RED 2 X, once
per second, then
2 second pause.
hp workstation xw4100 service and technical reference guide
diagnosis and service action
System does not power on
Press power button. If HDD LED = GREEN, then:
1. Verify voltage selected.
2. Remove expansion cards one-at-a-time until the 3.3 V_Aux light
on the system board illuminates.
3. Replace system board.
OR
Press power button. If HDD LED does not illuminate, then:
1. Verify workstation plugged into live AC outlet.
2. Verify power button harness connected to system board.
3. Verify that both power supply cables are properly connected to
the system board.
4. Verify that the 3.3 V_Aux light on the system board is illuminated.
If on, replace the power button harness.
5. If the3.3 V_Aux light on the system board is not illuminated,
replace the power supply.
6. Replace system board.
Workstation on. No action required.
Workstation is in Standby. No action required.
Workstation in Suspended to RAM mode (select models) or normal
Suspend mode. No action required.
Workstation in Suspend to Disk or "Hibernate" mode. No action
required.
CPU not installed:
1. Install CPU.
2. Reseat CPU.
Thermal Shutdown:
1. Ensure the workstation air vents are not blocked and cooling fan
is running.
2. Open hood, press power button, and see if processor fan spins. If
not spinning, ensure fan cable is plugged into the system board.
ensure fan is fully/properly seated.
3. If fan is plugged in and seated but not spinning, then replace
processor fan.
4. Reseat CPU heatsink and verify fan assembly properly attached.
system diagnostics and troubleshooting
5–7