After you connect external SCSI device, computer does not boot
1 Verify that device and SCSI chain are terminated correctly.
2 Switch on external SCSI device before starting computer.
3 Check cable connections.
4 Try known-good SCSI cable.
5 Verify that SCSI ID select switch setting on external device is unique.
6 Try known-good external SCSI device.
7 Try known-good external SCSI device without terminator.
8 Replace I/O logic board.
Serial device such as digital camera not recognized by computer
Update Serial DMA extension to version 2.1 or higher. Make AppleTalk inactive in the AppleTalk control panel under options and restart unit.
Turn on camera after initiating download with camera application.
Try different serial device on same port. Replace I/O logic board.
Cursor does not move when you are using trackpad
Shut down computer, unplug adapter, and remove battery. Let computer sit for 1 minute before restarting. Reset power manager.
Connect low power mouse and try to move cursor. If trackpad does not move cursor but external ADB mouse does, replace trackpad. If external ADB mouse also doesn't move, replace PMU board.
Check trackpad connections. Check keyboard connections. Replace I/O logic board.
Cursor intermittently Note: User must touch trackpad with the surface of only one does not move or finger at a time and point directly down on the trackpad surface.
1 Clean trackpad surface (with computer off, using a non-static inducing material).
2 Reset power manager.
3 Check trackpad connections.
4 Replace trackpad.
5 Replace trackpad cable.
6 Replace PMU card.
7 Replace I/O logic board.
Cursor moves, but 1
clicking trackpad 2
button has no effect 3
Reset power manager. Check trackpad connections. Replace trackpad cable. Replace PMU card. Replace I/O logic board. Replace trackpad.
Cursor does not move when you are using mouse
Note: S-Video and ADB ports look the same; make sure you plug the mouse into the ADB port.
2 Try a known-good low-power mouse. If the known-good mouse works, clean mouse ball and inside of original mouse and retest. If original mouse still doesn't work, replace it.
3 Replace I/O logic board.
No response to any key on keyboard
Verify that computer is on.
Reset the power manager (restart computer by holding down shift-FN-Control-power on).
Check keyboard connection by disconnecting and reconnecting keyboard cables.
Replace keyboard cable.
Replace PMU card.
Replace I/O logic board.
Known-good direct-connect printer does not print
Verify that Chooser and Control Panel settings are correct. (AppleTalk inactive; modem port selected if printer and modem port appear separately.)Make AppleTalk inactive in the AppleTalk control panel under options and restart unit. Check cables. Replace printer cable. Try known-good printer. Replace I/O logic board.
Known-good network printer does not print
1 Reset PRAM.
2 Verify that Chooser and Control Panel settings are correct.
3 Reinstall printer drivers.
4 Check cables.
5 Attach computer directly to printer, and retest.
6 Replace I/O logic board.
I/O devices are unrecognized, or garbage is transmitted or received
1 Reset PRAM.
2 Check cables (use Apple cables).
3 Verify that SCSI device is correctly terminated.
4 Verify that SCSI ID select switch setting on external device is unique.
5 Check with vendor for current drivers.
6 Test device with known-good computer.
7 Replace I/O logic board.
In disk mode, 1
computer does not 2
display SCSI icon until host is booted, 3
or computer crashes 4
when host is shut down
Verify that computer has a unique SCSI ID.
Check that SCSI disk mode cable is good and that connection is tight.
Make sure password security is off. Replace I/O logic board.
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