HP Z800 Maintenance And Service Manual page 257

Table 6-8 Diagnostic lights and audible codes
Activity
Blue Power LED
*
beeps.
Blue Power LED
*
two seconds. No beeps.
*
Blue Power LED
*
beeps.
Blue Power LED
*
times*, once per second.
No beeps.
Blue Power LED
*
times*, once per second.
No beeps.
*User-selectable. See
menu on page 35for details.
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
Possible cause
on. No Workstation on.
blinks every Workstation in Sleep mode
(S3-Suspend to RAM). Select
models only.
is off. No Workstation in Hibernate
*
mode (S4-Suspend to disk).
blinks three Workstation in Sleep mode
(S3-Suspend to RAM). Select
*
models only.
blinks four Workstation in Hibernate
mode (S4-Suspend to disk).
*
The Computer Setup (F10) Utility
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).
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
N/A
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