NEC PowerMate VP75 User Manual page 122

Table Section 4-4 Problems and Solutions
Problem Symptom
Diskette drive does Lamp on drive panel does not
not work light when diskette is loaded.
Hard disk Hard disk drive lamp does not
malfunction light but hard disk drive can be
accessed.
Hard disk controller failure
message displayed.
Cannot access hard disk.
Memory malfunction Total memory is not recognized.
Sound board No output from both the 8-bit
malfunction and 16-bit digitized sounds.
Maintenance and Troubleshooting
Solution
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 and power connections
between hard disk, PCB, and power
supply.
2. Check drive jumper settings (refer to
Section 3).
3. Check power supply and replace hard
disk cable.
4. Replace hard disk.
5. Replace system board (or hard disk
controller PCB if system board is not
used).
1. Reseat SIMMs.
2. Systematically swap SIMMs.
3. Check to see if the SIMM configuration
is valid (see Section 3).
4. Replace SIMMs.
5. Replace system board.
1. Check interrupts. Refer to Appendix D
for interrupt settings.
2. Check DMA channels. Refer to
Appendix D for DMA channel settings.
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