Cursor Problems

This section deals with a cursor that moves on the screen, but clicking the mouse has no effect or double-clicking the mouse does not open an application, disk or server.

Possible Cause

Possible Fix

Corrupted PRAM.

Reset parameter RAM. Hold down <Command> <Option> <P> <R> during startup but before "Welcome to Macintosh" appears.

Corrupted system software.

Boot off the system CD that came with the unit. Does the cursor work now? Yes: Reinstall system software. (You must use the system software CD that came with the unit to get the correct version of Mac OS.) No: Go to next step.

Bad USB port on the keyboard.

If the mouse is connected to the keyboard, connect the mouse to one of the USB ports inside the iMac I/O panel instead. Does the cursor work now? Yes: Replace the keyboard. No: Replace the mouse.

Bad USB port on the iMac.

If the mouse is already connected to one of the USB ports inside the iMac I/O panel, switch it to the other USB port. Does the cursor work now? Yes: Replace the logic board. No: Go to next step.

Bad mouse.

Replace mouse.

Bad logic board.

Replace logic board.

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