USB and FireWireTroubleshooting
PowerBook (FireWire)
21
Cursor moves on screen with external mouse
connected, but clicking or double-clicking the
mouse has no effect
1. If the mouse is connected to an external keyboard,
connect the mouse to one of the USB ports on the
computer.
2. Try the other USB port.
3. Try another mouse.
4. Reset PRAM.
5. Boot off the CD that came with the computer. If the mouse
works, reinstall the system software.
6. Replace I/O logic board.
Cursor moves, but clicking trackpad button has no
effect
1. Reset power manager (press the reset button behind the
I/O door.
2. Remove top case and manually press trackpad button on
power supply with a nylon tool or other non-metal
object. If button activates cursor, check top case seating.
3. Replace power supply card.
4. Replace trackpad button actuator (included in the top
case).
Cursor does not move on the screen with an
external mouse, but USB external keyboard works
1. Verify that the mouse is connected securely to the USB
keyboard or port.
2. Check inside mouse for buildup of dirt or other
contaminants. Clean mouse if necessary.
3. If mouse is connected to the keyboard, connect it to a USB
port.
4. Try the other USB port.
5. Try another mouse.
6. Replace I/O logic board.
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