Apple powermac g3 blue.white 服务手册

 Troubleshooting

Symptom Charts/Input Device Problems - 56

Cursor moves, but 

clicking USB mouse 

button has no effect

1 Boot from bootable CD and test.

2 If mouse is connected to keyboard, connect the mouse to one of 

the USB ports on the I/O panel instead. If the cursor moves, 

replace keyboard. 

3 If connected to I/O, try the other I/O connector. Does it 

work? Replace logic board.

4 Replace USB mouse.

5 Replace logic board. 

Double-click doesn’t 

open application, 

disk, or server

1 Boot with Extensions off.

2 Remove duplicate system folders and reboot.

3 Clear parameter RAM. Hold down Command-Option-P-R 

during startup but before “Welcome to Macintosh” appears.

4 Boot from bootable CD and test.

No response to any 

key on keyboard

1 Boot with Extensions off.

2 Check keyboard connection to USB port.

3 Boot from bootable CD and test.