NEC POWERMATE P - SERVICE MANUAL 1996 Service And Reference Manual page 112

4-8 Maintenance and Troubleshooting
Problem
Diskette drive does not work
Hard disk malfunction
Memory malfunction
Table Section 4-6 Problems and Solutions
Symptom
Lamp on drive panel does not
light when diskette is loaded.
Hard disk drive lamp does not
light but hard disk drive can be
accessed.
Hard disk controller failure
message displayed.
Cannot access hard disk.
Total memory is not recognized.
Solution
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
(see Section 3).
3. Check power supply and
replace diskette cable.
4. Replace diskette drive.
5. Replace system board.
1. Check cable connections
between lamp and system board.
1. Check that the IDE port and
hard disk drives are enabled in
Setup.
1. Check signal/power
connections between hard disk,
PCB, power supply.
2. Check drive jumper settings
(see Section 3).
3. Check power supply.
4. Check hard disk cable and
hard disk. Replace as necessary.
5. Replace system board (or
hard disk controller PCB if the
system board controller is not
used).
1. Reseat SIMMs.
2. Systematically swap SIMMs.
3. Check to see if the SIMM
configuration is valid (see Section
4).
4. Replace SIMMs.