HP VA799UT 799UT#ABA, Z400 H2D81US manual See the ROM Flash section of the Maintenance and Service

Table 6-8Diagnostic lights and audible codes (continued)

Activity	Possible cause		Recommended action
Red Power LED blinks eight	Invalid ROM based on bad	CAUTION: Internal components might be powered even when the
times, once every second,	checksum.	workstation is off. To prevent damage, disconnect the workstation power
followed by a two-second		cord before you remove a component.
pause. Eight beeps.		1.	Clear CMOS.
			NOTE: Refer to the Maintenance and Service Guide for the
			workstation model for detailed information on clearing CMOS.
		2.	Upgrade the ROM using SoftPaq, either from the hard disk drive,
			CD, diskette, or USB removable device (for example, HP Drive Key).
			See the ROM Flash section of the Maintenance and Service
			Guide at http://www.hp.com/support/workstation_manuals. SoftPaq
			is a self-extracting executable, which contains instructions for its
			use, that enables you to upgrade the ROM. To download the Softpaq
			executable, visit http://www.hp.com/go/workstationsupport.
		3.	The problem might be on the system board. Contact HP for
			assistance.

Red Power LED blinks nine times, once every second, followed by a two-second pause. Nine beeps.

System powers on but does not start.

●The problem might be on the system board. Contact HP for assistance.

●The problem might be in the CPU. Contact HP for assistance.

System does not power-on	System unable to power on. CAUTION: Internal components might be powered even when the
and LEDs are not blinking.	workstation is off. To prevent damage, disconnect the workstation power
No beeps.	cord before you remove a component.
	To resolve the problem, choose one of the following options:
	Press and hold the power button for less than 4 seconds. If the hard disk
	drive LED turns green, then:
	1.	Remove the expansion cards one at a time and try holding the power
		button again for less than 4 seconds.
	2.	The problem might be on the system board. Contact HP for
		assistance.

Press and hold the power button for less than 4 seconds. If the hard disk drive LED does not turn on green then:

1.Check that unit is plugged into a working AC outlet.

2.Open the access panel and check that the power button harness is properly connected to the system board.

3.Check that all power supply cables are properly connected to the system board.

4.Check the power supply functionality

a. Disconnect the AC power.

b. Disconnect all internal power supply cables.

c. Plug in the AC power.

If the power supply fan spins and the BIST** LED lights, the power supply is functional. The problem might be on the system board. Contact HP for assistance.

If the power supply fan does not spin or the BIST** LED does not light, the problem might be in the power supply. Contact HP for assistance.

*The BIOS option you select controls the blue LED function during these suspend modes.

**Some workstation models do not have BIST LED functionality.

ENWW Diagnostic codes and errors 137