Macintosh Classic - No Response to any Key on Keyboard

Troubleshooting Symptom Charts/Peripheral (Continued) - 10
Peripheral
(Continued)
Cannot double-click
to open application,
disk, or server
1 Remove extra system files on hard drive.
2 Clear parameter RAM. Hold down <Shift> <Option>
<Command> keys and select Control Panel from Apple pull-
down menu. Reset mouse controls.
3 If mouse was connected to keyboard, connect it to rear ADB
port instead. If mouse works, replace keyboard.
4 If mouse does not work in any ADB port, replace mouse.
5 Replace logic board. Retain customer’s SIMMs.
No response to any
key on keyboard
1 Check keyboard connection to ADB port.
2 Replace keyboard cable.
3 Replace keyboard.
4 Replace logic board. Retain customer’s SIMMs.