HP Dc5700 HP Compaq dc5700 Business PC Service Reference Guide, 1st Edition - Page 169
Power LED flashes Red, Ensure computer air vents are
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Troubleshooting Without Diagnostics Solving Minor Problems (Continued) Problem Cause Poor performance is experienced. (continued) Cause unknown. 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. Beeps continue for five iterations after which the LED flashes will continue until the problem is resolved. Processor thermal protection activated: A fan may be blocked or not turning. OR The heatsink is not properly attached to the processor. Possible Solution Restart the computer. 1. Ensure computer air vents are not blocked and the cooling fan is running. 2. Open hood, press power button, and see if the processor fan spins. If not spinning, make sure the fan's cable is plugged onto the system board header. 3. Replace the processor heatsink-fan assembly. Service Reference Guide, dc5700 437804-001 D-5