Solving Power Supply Problems - HP Compaq d330 DT Troubleshooting Manual

Troubleshooting Without Diagnostics

Solving Power Supply Problems

Solving Power Supply Problems
Problem
Power supply shuts down
intermittently.
Computer powered off
automatically and the
Power LED flashes Red two
times, once every second,
followed by a two second
pause.
2–8
Cause
Voltage selector switch
on rear of computer
chassis not switched to
correct line voltage
(115V or 230V).
Power supply will not
turn on because of
internal power supply
fault.
Processor thermal
protection activated:
A fan may be blocked
or not turning.
OR
The heatsink/fan
assembly is not properly
attached to the
processor.
www.hp.com
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 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. 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.
Troubleshooting Guide