HP D530 HP Compaq Business Desktop d500 Service Reference Guide, 5th Edition - Page 196
Solving Power Supply Problems, Problem, Cause, Solution
UPC - 808736649308
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Troubleshooting Without Diagnostics Solving Power Supply Problems Solving Power Supply Problems Problem Cause Power supply shuts down intermittently. Voltage selector switch on rear of computer chassis not switched to correct line voltage. Power supply fault. Computer powered off automatically and the Power LED flashes Red two times, once every second, followed by a two second pause. Processor thermal protection activated: A fan may be blocked or not turning. OR The heatsink/fan assembly is not properly attached to the processor. Power LED flashes Red, once every two seconds. Power failure (power supply is overloaded). Solution Select the proper AC voltage. Replace the power supply. 1. Ensure that the computer air vents are not blocked and the cooling fan is running. 2. Open hood, press the power button, and see if the processor fan spins. If the processor fan is not spinning, make sure the fan's cable is plugged onto the system board header. Ensure the fan is fully/properly seated or installed. 3. Replace the processor fan. 4. Reseat processor heatsink and verify that the fan assembly is properly attached. 1. Check that the voltage selector, is set to the appropriate voltage. 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). 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 causing the failure. Continue adding devices one at a time to ensure all devices are functioning properly. 4. Replace the power supply. 5. Replace the system board. D-4 336492-005 Service Reference Guide, d500