Maintenance and Troubleshooting 4-5
Problems and Solutions
Problem
Symptom
Solution
No power
Power lamp on computer will not
light.
Check that the power cord is plugged into
the AC connector on the computer.
Check that the other end of the cord is
plugged into a live properly grounded AC
power outlet.
Check cable connections between the
power supply and the system board.
Systematically eliminate possible shorted
boards by removing cables and expansion
boards.
Check the +5 and +12 power supply
voltages (see “Connector Pin
Assignments”). Measure voltages with the
system board installed.
Replace the power supply.
Replace the system board.
Power supply
malfunction
Any of the following conditions
can occur:
Front panel lamps out, diskette
and/or hard drives do not spin,
monitor blank, interface ports not
working , and keyboard lamp out
and/or cannot input from the
keyboard.
Perform the first four checks in the solution
for the “No power” problem in this table.
Check power supply voltages. Voltages
should be measured with a load on them
(system board plugged in). See “Connector
Pin Assignments.”
Replace the power supply.
Operating system does
not boot.
Intermittent beeping at power on.
Computer beeps more than once
and is unable to complete
bootup.
Check system configuration (see “Setup
Utility”).
Check all jumper settings and verify that
drives are enabled (see “Setup Utility”).
Reseat DIMMs and option boards in their
connectors. Inspect system board for
dropped objects.
Remove option boards and reboot.
Replace system board.
“Invalid Configuration” message
displayed.
Press F2 to run Setup and correct the
parameters.
Replace the CMOS battery if the date and
time must be set each time the computer is
powered on.
