Compaq dc7100 Troubleshooting Guide - Page 26
Solving Power Supply Problems, Common causes and solutions for power supply problems are listed
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Troubleshooting Without Diagnostics Solving Power Supply Problems Common causes and solutions for power supply problems are listed in the following table. Solving Power Supply Problems Problem Cause Power supply shuts down intermittently. Voltage selector switch on rear of computer chassis (some models) not switched to correct line voltage (115V or 230V). Power supply will not turn on because of internal power supply fault. Computer powered off automatically and the Power LED flashes Red two times, once every second, followed by a two second pause, and the computer beeps two times. Processor thermal protection activated: A fan may be blocked or not turning. OR The heatsink is not properly attached to the processor. Solution Select the proper AC voltage using the selector switch. Contact an authorized service provider to replace the power supply. 1. Ensure that the computer air vents are not blocked and the processor cooling fan is running. 2. Open hood, press 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. If fan is plugged in and seated properly, but is not spinning, then replace the processor fan. 4. Reseat processor heatsink and verify that the fan assembly is properly attached. 5. Contact an authorized reseller or service provider. 2-10 www.hp.com Troubleshooting Guide