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Memory malfunction
Total memory not recognized.
Fax/data/
speakerphone
No output from board.
board malfunction
Keyboard or mouse
Monitor has prompt, but cannot
malfunction
input data.
Monitor malfunction
Unable to synchronize display.
Wavy display.
Blank display.
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 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.
1. Adjust the monitor's synchronization
controls.
2. Check that the monitor's resolution
matches the video setting or the video driver
used.
3. Check that the utility is not selecting a
refresh rate/resolution that is not supported
by the monitor.
4. Check that the driver used matches the
capabilities of the video controller and video
memory.
1. Check that the computer and monitor are
not near motors or electric fields.
1. Press any key or move the mouse to ensure
power management has not blanked the
display.
2. Check that the monitor power switch is
on.
3. Check that the monitor cable is attached to
the video connector at the back of the
system.
4. Check cable connections between the AC
power supply and monitor.
5. Adjust brightness and contrast controls on
the monitor.
6. Replace system board or graphics board,
depending on model.
7. Replace monitor.
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