Maintenance and Troubleshooting 4-7
Table Section 4-2 Problems and Solutions
Problem
Symptom
Solution
Hard disk
malfunction (cont’d)
Cannot access hard disk.
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).
Memory
malfunction
Total memory is not
recognized.
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.
Sound malfunction
No output sounds.
1.
Check interrupts. Refer to Section 1 for
interrupt settings.
2.
Check DMA channels. Refer to
Section 1 for DMA channel settings.
3
. Replace system board.
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 B).
4
. Replace keyboard (or mouse).
5
. Replace system board.
Monitor malfunction
Unable to synchronize
display.
1
. Adjust the monitor's synchronization
controls.
2
. Check that the driver used matches the
capabilities of the video DRAM installed.
3
. Check that the monitor's resolution
matches the video setting and supported
video drivers used (see Section 1).
4
. Check that the utility is not selecting a
refresh rate/resolution that is not
supported by the monitor.