4-10 Maintenance and Troubleshooting
Table 4-2 Problems and Solutions
Problem
Symptom
Solution
Power supply
malfunction
Any of the following
conditions could 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
keyboard.
1.Perform steps 1 through 4 listed in
this table under No Power.
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 Section 1 for power
supply specifications.
3.Replace the 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 (see
Section 2).
2.Check all jumper settings and verify
that drives are enabled (see
appendices and Section 2).
3.Reseat DIMMs and option boards in
their connectors. Inspect system
board for foreign objects such as
paper clips.
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 CMOS 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
appendices), then power-on the
computer.
2. Check condition of selected
bootload device (diskette, disc, or
hard disk) for bad boot track or
incorrect OS files.
3. Try booting OS from diskette or
disc, or recopy OS files onto hard
disk.
4. Verify correct hard disk is selected.
