NEC POWERMATE PROFESSIONAL 9000 Service Manual page 212

Problem Symptom
Diskette drive does Lamp on drive panel does not
not work light when diskette is loaded.
Hard drive Hard drive lamp does not light
malfunction but hard drive can be
accessed.
IDE hard drive controller failure
message displayed.
Cannot access hard disk.
Memory Total memory not recognized.
malfunction
Modem board No output from board.
malfunction
Table 4-2 Problems and Solutions
Maintenance and Troubleshooting
Solution
1. Check power and signal cable
connections between diskette drive,
system board, and power supply.
2. Check diskette drive cable. Replace
as necessary.
3. Check power supply.
4. Replace diskette drive.
5. Replace system board.
1. Check cable connections between
lamp and system board.
1. Check that the IDE channel and hard
drives are enabled in Setup.
1. Check signal/power connections
between hard disk, PCB, power supply.
2. Check hard drive jumper settings.
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 DIMMs.
2. Systematically swap DIMMs.
3. Check to see if the DIMM
configuration is valid (see Section 1).
4. Replace DIMMs.
5. Replace system board.
1. Check interrupts (see Section 1).
2. Check DMA channels (see Section 1).
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