HP Z800 Workstation Maintenance And Service Manual page 225

Table 6-8
Blue Power LED
beeps.
Blue Power LED
every two seconds.
beeps.
Blue Power LED
beeps.
Blue Power LED
three times*, once per
second.
Blue Power LED
times*, once per second.
beeps.
*User-selectable. See
menu on page
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.
Red Power LED blinks three
times, once every second,
followed by a two-second
pause. Three beeps.
ENWW
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Diagnostic lights and audible codes
Activity Possible cause
on. No Workstation on.
*
blinks Workstation in Sleep mode
*
* No (S3-Suspend to RAM).
Select models only.
is off. No Workstation in Hibernate
* *
mode (S4-Suspend to disk).
blinks Workstation in Sleep mode
*
(S3-Suspend to RAM).
* No beeps. Select models only.
blinks four Workstation in Hibernate
*
* No mode (S4-Suspend to disk).
The Computer Setup (F10) Utility
35for details.
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.
CPU not installed (not an
indicator of bad CPU).
manuals search engine
Recommended action
CAUTION: Internal components might be powered even when the
workstation 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.
1. Verify that the CPU is present.
2. Reseat the CPU.
Diagnostic codes and errors 213
N/A