NEC DIRECTION L Service Manual page 73

4-6 Maintenance and Troubleshooting
Problem
Operating system
does not boot
Diskette drive does
not work
Table 4-2 Problems and Solutions
Symptom
Intermittent beeping at power-
on. Computer beeps more than
once and is unable to complete
bootup.
"Invalid Configuration"
message displayed.
Computer halts during loading
sequence.
Lamp on drive panel does not
light when diskette is loaded.
Solution
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 dropped objects.
4. Remove option boards and reboot.
5. Replace system board.
F2
1. Press
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
appendices), 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 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 diskette cable. Replace as
necessary.
4. Check power supply.
5. Replace diskette drive.
6. Replace system board.