HP Mini dc7700 tower Activity, Recommended Action, Beeps Possible Cause, POST Diagnostic Front Panel LEDs and Audible Codes (Continued)

POST Error Messages

POST Diagnostic Front Panel LEDs and Audible Codes (Continued)

Activity Beeps Possible Cause Recommended Action

Red Power LED	3	Processor not
flashes three times,		installed (not an
once every		indicator of bad
second, followed		processor).

by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved.

1.Check to see that the processor is present.

2.Reseat the processor.

Red Power LED	4	Power failure	1.	Open the hood and ensure the 4 or
flashes four times,		(power supply is		6-wire power supply cable is seated
once every		overloaded).		into the connector on the system
second, followed				board.
by a two second			2.	Check if a device is causing the
pause. Beeps stop
				problem by removing ALL attached
after fifth iteration
				devices (such as hard, diskette, or
but LEDs continue
				optical drives, and expansion cards).
until problem is
				Power on the system. If the system
solved.
				enters the POST, then power off and
				replace one device at a time and
				repeat this procedure until failure
				occurs. Replace the device that is
				causing the failure. Continue adding
				devices one at a time to ensure all
				devices are functioning properly.
			3.	Replace the power supply.
			4.	Replace the system board.
Red Power LED	5	Pre-video memory	Ä To avoid damage to the DIMMs or the
flashes five times,		error.		system board, you must unplug the
once every				computer power cord before
				attempting to reseat, install, or remove
second, followed				a DIMM module.
by a two second			1.	Reseat DIMMs.
pause. Beeps stop			2.	Replace DIMMs one at a time to
after fifth iteration
				isolate the faulty module.
but LEDs continue
			3.	Replace third-party memory with HP
until problem is
solved.				memory.
			4.	Replace the system board.

C–10 433612-001 Service Reference Guide, dc7700