Apple Performa 6400/180 - Manual (Page 90)

Troubleshooting Symptom Charts/Peripheral - 16
Peripheral
Cannot double-click
mouse to open
application, disk, or
server
1 Check mouse speed on Mouse control panel.
2 Unplug battery from logic board, wait 20 seconds, plug in
battery, and restart computer.
3 If mouse was connected to keyboard, connect mouse to rear
ADB port and disconnect keyboard. If mouse works, replace
keyboard.
4 If mouse does not work in ADB port, replace mouse.
5 Replace logic board. Retain customer’s DIMMs.
No response to any
key on keyboard
1 Verify that system software is version 7.5.3 or later.
2 Check keyboard connection to ADB port.
3 Replace keyboard.
4 Reseat logic board.
5 Replace logic board. Retain customer’s DIMMs.