NEC POWERMATE PROFESSIONAL - SERVICE MANUAL 05-1997 Service Manual page 145

Problem Symptom
Operating system Intermittent beeping at
does not boot power-on. Computer beeps
more than once and is unable
to complete boot-up.
"Invalid Configuration"
message displayed.
Computer halts during
loading sequence.
Diskette drive does Lamp on drive panel does not
not work light when diskette is loaded.
Table 4-4 Problems and Solutions
Maintenance and Troubleshooting
Solution
1. Check system configuration and switch
settings (refer to Appendix B).
2. Verify that drives are enabled.
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.
1. Press F1 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.
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 that correct hard disk is selected.
1. Check power and signal cable
connections between diskette drive,
system board, and power supply.
2. Check diskette drive jumpers.
3. Check power supply and replace
diskette cable.
4. Replace diskette drive.
5. Replace system board.
4-13