Maintenance and Troubleshooting 4-7
Table Section 4-6 Problems and Solutions
Problem
Symptom
Solution
Measure voltages with the
system board installed.
5
.
Replace power supply.
6
.
Replace system board.
Power supply malfunction
Any one or more of the
following conditions could
occur:
1
.
Perform steps 1 through 4
listed in this table under No
Power.
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
keyboard.
2
.
Check power supply
voltages. Voltages should be
measured with a load on them
(system board plugged in). See
Appendix A for connector pin
assignments.
3
.
Replace power supply.
Operating system does not boot
Intermittent beeping at power-on.
Computer beeps more than once
and is unable to complete boot-
up.
1
.
Check system configuration.
2
.
Check all jumper settings
and verify that drives are enabled
(refer to Section 2).
3
.
Reseat SIMMs and option
boards in their connectors.
Inspect system board for
dropped objects.
4
.
Remove option boards and
reboot.
5
.
Replace system board.
“Invalid Configuration” message
displayed.
1
.
Press
F2
to run Setup and
correct the parameters.
2
.
Replace the system board if
the date and time must be set
each time the computer is
powered on. (The RTC/battery
backup chip may be defective.)
Computer halts during loading
sequence.
1
.
Power the computer off.
Check for proper jumper settings
(Appendix B), then power-on the
computer.
2
.
Check condition of selected
bootload device (diskette or hard
disk) for bad boot track or
incorrect OS files.
