HP dx5150 manual Off and replace one device at a

POST Error Messages

Diagnostic Front Panel LEDs and Audible Codes (Continued)

		Possible
Activity	Beeps	Cause	Recommended Action
Red Power LED	None	Power failure	1.	Open the hood and ensure the
flashes four times,		(power supply		4-wire power supply cable is
once every second,		is		seated into the connector on the
followed by a		overloaded).		system board.
two-second pause.			2.	Check if a device is causing the
The Power LED will
				problem by removing ALL attached
continue flashing
				devices (such as hard, diskette, or
until the problem is
				optical drives, and expansion
resolved.
				cards). Power on the system. If the
				system 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	1.	Reseat DIMMs. Power on the
flashes five times,		memory error.		system.
once every second,			2.	Replace DIMMs one at a time to
followed by a
				isolate the faulty module.
two-second pause.
			3. Replace third-party memory with
The Power LED will
				HP memory.
continue flashing
			4.	Replace the system board.
until the problem is
resolved.

Troubleshooting Guide www.hp.com A–7