Troubleshooting guide

Table 4-3 Diagnostic lights and audible codes
Activity Possible cause Recommended action
Green Power LED On. No
beeps.
Workstation on.
None
Green Power LED blinks
every two seconds.** No
beeps.
Workstation in Suspend to
RAM mode (select models
only) or normal Suspend
mode.
Green Power LED is off.**
No beeps.
Workstation in Suspend to
Disk or “Hibernate” mode.
Green Power LED blinks
three times, once per
second.** No beeps
Workstation in Suspend to
RAM mode (select models
only) or normal Suspend
mode.
Green Power LED blinks
four times, once per
second.** No beeps.
Workstation in Suspend to
Disk or “Hibernate” mode.
NOTE: ** — The BIOS option you select controls the green LED function during these suspend modes.
For the following LED activity and beeps, the beeps are heard through the chassis speaker. Blinks and beeps repeat for 5 cycles, after
which, only the blinks continue to repeat.
Red Power LED blinks two
times, once every second,
followed by a two-second
pause. Two beeps.
Processor thermal
protection activated by either
of the following methods:
●
A fan might be blocked
or not turning.
●
The heatsink and fan
assembly is not
properly attached to the
processor.
CAUTION: Internal components might be powered even when the
system is off. To prevent damage, disconnect the workstation power cord
before you remove a component.
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 verify that the
processor fan is spinning. If the processor fan is not spinning, make
sure the fan cable is plugged into the system board header. Ensure
the fan is fully and properly seated or installed.
3. If fan is plugged in and seated properly, but is not spinning, the
problem might be in the processor fan. Contact HP for assistance.
4. Verify that the fan assembly is properly attached. If problems persist,
there might be a problem with the processor heatsink. Contact HP
for assistance.
Red Power LED blinks three
times, once every second,
followed by a two-second
pause. Three beeps.
Processor not installed (not
an indicator of bad
processor).
1. Verify that the processor is present.
2. Reseat the processor.
Red Power LED blinks four
times, once every second,
followed by a two-second
pause. Four beeps.
Power failure (power supply
is overloaded)
CAUTION: Internal components might be powered even when the
system is off. To prevent damage, disconnect the workstation power cord
before you remove a component.
1. Open the access panel and ensure the following connections are
secure on the system board:
◦
24–pin main power (all systems)
◦
4–pin CPU (xw4000 series)
◦
8–pin CPU (xw6000/xw8000/xw9000 series)
◦
4–pin memory (xw8000/xw9000 series)
ENWW Basic troubleshooting 29