NEC DIRECTION L Service Manual page 74

Problem Symptom
Hard drive Hard drive lamp does not light
malfunction but hard drive can be
accessed.
Hard drive controller failure
message displayed.
Cannot access hard disk.
Memory Total memory not recognized.
malfunction
Modem board No output from board.
malfunction
Keyboard or mouse Monitor has prompt, but cannot
malfunction input data.
Table 4-2 Problems and Solutions
Maintenance and Troubleshooting
Solution
1. Check cable connections between
lamp and system board.
1. Check that the IDE port and hard
drives are enabled in Setup.
1. Check signal/power connections
between hard disk, system board, 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 board 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 3).
4. Replace DIMMs.
5. Replace system board.
1. Check interrupts (see Appendix C).
2. Check DMA channels (see Section 1).
1. Check that keyboard/mouse is
plugged in.
2. Check password (see Section 2).
3. Disable password (see Appendix C).
4. Replace keyboard (or mouse).
5. Replace system board.
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