iMac G5, 17-inch Troubleshooting - 45
Symptom Charts
3. Try a known good USB mouse.
4. Replace the mouse.
5. Replace the logic board.

The mouse is slow to respond.

1. Try putting the mouse on a different surface - an opaque surface with no patterns is
best.
2. Adjust the settings on the mouse.
– Choose Apple menu > System Preferences and click Keyboard & Mouse.
– Click Mouse.
– Drag the Tracking Speed slider to select how fast the pointer moves. Drag the
Double-Click Speed slider to set how fast you have to double-click.
3. If the mouse still doesn’t work, insert the iMac Software Install and Restore disc that
came with your computer. Shut the computer down and then start it up while holding
down the letter “c” on the keyboard. Does the mouse work when the computer is
started up from this disc?
4. Try a known good USB mouse.
5. Replace the mouse.
6. Replace the logic board.
Keyboard

None of the keys on my keyboard work.

1. Unplug all devices from your computer, including your mouse and keyboard as well as
printer, scanner, external hard drives, and hubs. (Warning: Some devices may require
you to perform steps before it is safe to unplug them, e.g, external storage devices.)
Be sure to unplug your hub, if you have one.
2. Plug your keyboard into the back of your computer firmly and securely. Plug your
mouse into the back of your computer firmly and securely. Take special care to make
sure the connector is completely in the socket. Go on to step 3.
3. Does your keyboard work now?
Yes: Problem solved.
No: Unplug your keyboard and plug it into another USB slot on the back of your iMac
Does it work now?
–Yes: Replace the logic board.
–No: Unplug your keyboard and plug your mouse into the port the keyboard just
occupied. Go on to step 4.
4. Does your mouse work now?
Yes: Replace the keyboard.