Maintenance and Troubleshooting 4-11
Table 4-2 Problems and Solutions
Problem
Symptom
Solution
Diskette drive
does not work
Lamp on drive panel does
not light when diskette is
loaded.
1.Check power and signal cable
connections between diskette drive,
riser board, and power supply.
2.Check diskette drive cable. Replace
as necessary.
3.Check power supply.
4.Replace diskette drive.
5.Replace system board.
6.Replace riser board.
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 channel and
hard drives are enabled in Setup.
Cannot access hard disk.
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).
6.Replace riser board.
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 1).
4.Replace DIMMs.
5.Replace system board.
Modem board
malfunction
No output from board.
1.Check interrupts (see Section 1).
2.Check DMA channels (see Section 1).