Apple iMac (17-inch Mid 2006) - Manual (Page 151)

iMac (17-inch (Mid 2006/Late 2006 CD) Troubleshooting — Symptom Charts 11
Keyboard
Certain keys or none of the keys on the keyboard function.
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.
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.
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.
Does your mouse work now?
Yes: Replace the keyboard.
No: Replace the logic board.
My keys are sticky or slow to respond.
Try a known good keyboard.
Open System Preferences. Click on the keyboard and mouse icon. Adjust the “key repeat
speed and delay until repeat” rate.
Replace the keyboard.
When I type, strange characters appear on the screen.
Depending on your iMac’s settings, a simple keystroke can change your keyboard from
English to Japanese. This can result in some pretty funny characters showing up when you
type. To switch to the US keyboard,
Open System Preferences.
Click on the International icon.
Click on the Input Menu near the top of the screen.
Scroll down the list and uncheck any non-US keyboard layouts.
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