HP Compaq dc5000S Informations techniques télécharger pdf (Page 144)

D–4 360201-002 Service Reference Guide, dc5000

Troubleshooting Without Diagnostics

Solving Power Supply Problems

Solving Power Supply Problems

Problem Cause Solution

Power supply shuts down

intermittently.

Voltage selector switch

on rear of computer

chassis not switched to

correct line voltage.

Select the proper AC voltage.

Power supply fault. 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.

Processor thermal

protection activated:

A fan may be blocked

or not turning.

OR

The heatsink/fan

assembly is not properly

attached to the

processor.

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.

Power LED flashes Red,

once every two seconds.

Power failure (power

supply is overloaded).

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.

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