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Solving Power Problems
Common causes and solutions for power problems are listed in the following table.
Table D-2 Solving Power Problems
Power supply shuts down intermittently.
Cause Solution
Voltage selector switch on rear of computer chassis (some
models) not switched to correct line voltage (115V or 230V).
Select the proper AC voltage using the selector switch.
Power supply will not turn on because of internal power
supply fault.
Contact an authorized service provider to replace the power
supply.
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 stop after fifth iteration but LEDs continue flashing.)
Cause Solution
Processor thermal protection activated:
A fan may be blocked or not turning.
OR
The heat sink is not properly attached to the processor.
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.
3. If fan is plugged in, but is not spinning, then replace the
heat sink/fan assembly.
4. Contact an authorized reseller or service provider.
Solving Power Problems 207