Apple Macintosh Performa 577 - Manual (Page 31)

Troubleshooting Symptom Charts/Peripheral
(Continued)
- 14
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
keys during system startup but before “Welcome to
Macintosh” appears.
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.