4-8 Maintenance and Troubleshooting
Table Section 4-6 Problems and Solutions
Problem Symptom Solution
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 and Appendix B for the
power supply specifications.
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 the F1 key to run Setup and
correct the parameters.
2. Replace the battery if the date and
time must be set each time the
computer is powered on.
Computer halts during loading
sequence
1. Power the computer off. Check for
proper jumper settings (see Section 2),
then power-on the computer.
2. Check condition of selected
bootload device (diskette or hard disk)
for bad boot track or incorrect OS files.
3. Try booting OS from diskette or
recopy OS files onto hard disk.
4. Verify the correct hard disk is
selected.
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