HP dx5150 manual Solving Power Supply Problems

Troubleshooting Without Diagnostics

Solving Power Supply Problems (Continued)

Problem	Cause	Solution
Power LED flashes Red four	Power failure (power	1.	Check that the voltage selector,
times, once every second,	supply is overloaded).		located on the rear of the power
followed by a two-second			supply (some models), is set to
pause. The Power LED will			the appropriate voltage. Proper
continue flashing until the			voltage setting depends on your
problem is resolved.			region.
		2.	Open the hood and ensure the
			4-wire power supply cable is
			seated into the connector on the
			system board.
		3. Check if a device is causing the
			problem by removing ALL
			attached devices (such as hard,
			diskette, or optical drives, and
			expansion 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.
		4.	Contact an authorized service
			provider to replace the power
			supply.

5. Replace the system board.

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