Apple performa 400 series Servicehandbuch
Troubleshooting
Symptom Charts/Peripherals - 9
Peripherals
Works with internal
or external SCSI
device but does not
work with both
1 Verify that SCSI select switch on external device is set to
different priority from internal.
2 Verify that external SCSI devices are properly terminated.
3 Replace terminator on external device.
4 Verify that terminator is installed on internal SCSI drive.
5 Replace SCSI select cable.
Cursor does not move
1 Reboot system.
2 Check mouse connection.
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 any ADB port, replace mouse.
5 Replace logic board. Retain customer’s SIMMs.