Troubleshooting Without Diagnostics

Solving Power Supply ProblemsSolving Power Supply Problems

Problem

Cause

Solution

 

 

 

Power supply shuts down

Voltage selector switch

Select the proper AC voltage.

intermittently.

on rear of computer

 

 

 

chassis not switched to

 

 

 

correct line voltage.

 

 

 

 

 

 

Power supply fault.

Replace the power supply.

 

 

 

 

Computer powered off

Processor thermal

1.

Ensure that the computer air

automatically and the

protection activated:

 

vents are not blocked and the

Power LED flashes every

A fan may be blocked

 

cooling fan is running.

four seconds.

or not turning.

2.

Open hood, press the power

 

OR

 

button, and see if the processor

 

The heatsink/fan

 

fan spins. If the processor fan is

 

 

not spinning, make sure the

 

assembly is not properly

 

 

 

fan's cable is plugged onto the

 

attached to the

 

 

 

system board header. Ensure

 

processor.

 

 

 

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.

 

 

 

 

E–4

415606-001

Service Reference Guide, dx2200 MT