HP DC5000 manual 168

Troubleshooting Without Diagnostics

Diagnostic Front Panel LEDs and Audible Codes (Continued)

Activity	Beeps	Possible Cause	Recommended Action
Red Power LED	7	System board	Replace the system board.
flashes seven		failure (ROM
times, once		detected failure
every second,		prior to video).
followed by a
two second
pause.
Red Power LED	8	Invalid ROM based	1.	Reflash the ROM using a ROMPaq
flashes eight		on bad checksum.		diskette. See the “ROM Flash” section
times, once				of the Desktop Management Guide.
every second,			2.	Replace the system board.
followed by a
two second
pause.
System does not	None	System unable to	Press and hold the power button for less
power on and		power on.	than 4 seconds. If the hard drive LED turns
LEDs are not			green, then:
flashing.			1.	Check that the voltage selector,
				located on the rear of the power
				supply, is set to the appropriate
				voltage. Proper voltage setting
				depends on your region.
			2.	Remove the expansion cards one at a
				time until the 3.3 V_aux light on the
				system board turns on.
			3.	Replace the system board.
			OR
			Press and hold the power button for less
			than 4 seconds. If the hard drive LED does
			not turn on green then:
			1.	Check that the unit is plugged into a
				working AC outlet.
			2.	Open hood and check that the power
				button harness is properly connected
				to the system board.
			3.	Check that both power supply cables
				are properly connected to the system
				board.
			4.	Check to see if the 3.3 V_aux light on
				the system board is turned on. If it is
				turned on, then replace the power
				button harness.
			5.	If the 3.3 V_aux light on the system
				board is not turned on, then replace
				the power supply.
			6.	Replace the system board.

D–28 360201-002 Service Reference Guide, dc5000