HP Z800 Sp632up SP632UPABA manual 8Diagnostic lights and audible codes, Activity Possible cause

Table 6-8Diagnostic lights and audible codes

Activity	Possible cause	Recommended action
Blue Power LED* on. No	Workstation on.
beeps.
Blue Power LED* blinks	Workstation in Sleep mode
every two seconds.* No	(S3-Suspend to RAM).
beeps.	Select models only.
Blue Power LED* is off.* No	Workstation in Hibernate
beeps.	mode (S4-Suspend to disk).
		N/A
Blue Power LED* blinks	Workstation in Sleep mode
three times*, once per	(S3-Suspend to RAM).
second.* No beeps.	Select models only.
Blue Power LED* blinks four	Workstation in Hibernate
times*, once per second.* No	mode (S4-Suspend to disk).
beeps.

*User-selectable. See The Computer Setup (F10) Utility menu on page 34for 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	CPU thermal protection	CAUTION: Internal components might be powered even when the
times, once every second,	activated by either of the	workstation is off. To prevent damage, disconnect the workstation power
followed by a two-second	following methods:	cord before you remove a component.
pause. Two beeps.	● A fan might be blocked	1.	Ensure that the workstation air vents are not blocked and the cooling
	or not turning.		fan is running.
	● The heatsink and fan	2.	Open the access panel, press power button, and verify that the CPU
	assembly is not		fan is spinning. If the CPU fan is not spinning, make sure the fan
	properly attached to the		cable is plugged into the system board header. Ensure the fan is
	CPU.		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	CPU not installed (not an	1.	Verify that the CPU is present.
times, once every second,	indicator of bad CPU).	2.	Reseat the CPU.
followed by a two-second

pause. Three beeps.

192 Chapter 6 Diagnostics and troubleshooting ENWW