Maintenance and Troubleshooting 4-7
Table 4-2 Problems and Solutions
Problem
Symptom
Solution
Hard drive
malfunction
Hard drive lamp does not light
but hard drive can be
accessed.
1. Check cable connections between
lamp and system board.
Hard drive controller failure
message displayed.
1. Check that the IDE port and hard
drives are enabled in Setup.
Cannot access hard disk.
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).
Memory
malfunction
Total memory not recognized.
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.
Modem
board malfunction
No output from board.
1. Check interrupts (see Appendix C).
2. Check DMA channels (see Section 1).
Keyboard or mouse
malfunction
Monitor has prompt, but cannot
input data.
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.