Apple M4753 Laptop User Manual


 
Troubleshooting Symptom Charts/Peripherals - 33
Cursor does not move
when you are using
mouse
Note:
S-Video and ADB ports look the same; make sure you plug
the mouse into the ADB port.
1 Check mouse connection to ADB port.
2 Try a known-good low-power mouse. If the known-good
mouse works, clean mouse ball and inside of original mouse
and retest. If original mouse still doesn’t work, replace it.
3 Replace I/O logic board.
No response to any
key on keyboard
1 Verify that computer is on.
2 Reset the power manager (restart computer by holding down
shift-FN-Control-power on).
3 Check keyboard connection by disconnecting and reconnecting
keyboard cables.
4 Replace keyboard.
5 Replace keyboard cable.
6 Replace PMU card.
7 Replace I/O logic board.