NEC POWERMATE PRO2180 - SERVICE MANUAL 1996 Service Manual page 135

Table Section 4-6 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 Total memory is not
malfunction recognized.
Sound malfunction No output from both the 8-bit
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.
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.
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 3).
4. Replace SIMMs.
5. Replace system board.
1. Check interrupts. Refer to Section 1 for
interrupt settings.
2. Check DMA channels. Refer to
Section 1 for DMA channel settings.
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