Table 11-8 Diagnostic lights and audible codes
Activity Possible cause Recommended action
Blue Power LED
*
on.
No beeps.
Workstation on.
None
Blue Power LED
*
blinks every two
seconds.
*
No beeps.
Workstation in
Suspend to RAM
mode (select models
only) or normal
Suspend mode.
Blue Power LED
*
is
off.
*
No beeps.
Workstation in
Suspend to Disk or
Hibernate mode.
Blue Power LED
*
blinks three times,
once per second.
*
No
beeps
Workstation in
Suspend to RAM
mode (select models
only) or normal
Suspend mode.
Blue Power LED
*
blinks four times, once
per second.
*
No beeps.
Workstation in
Suspend to Disk or
Hibernate mode.
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.
CPU 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
CPU.
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 CPU fan is spinning. If the CPU 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 CPU fan. Contact
HP for assistance.
4. Verify that the fan assembly is properly attached. If
problems persist, there might be a problem with the
CPU heatsink. Contact HP for assistance.
Red Power LED blinks
three times, once
every second, followed
by a two-second
pause. Three beeps.
CPU not installed (not
an indicator of bad
CPU).
1. Verify that the CPU is present.
2. Reseat the CPU.
ENWW Diagnostic codes and errors 85
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