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iMac (24-inch Mid 2007) Take Apart — Symptom Charts 239
The USB port on my keyboard doesn’t work.
Unplug all devises from your keyboard.1.
Plug your Apple mouse into the left USB port on your keyboard. Does your mouse work 2.
when it’s plugged into this port?
Yes: Now plug the mouse into the right port. Does it work?
Yes: Try a known good keyboard.
No: Try a known good mouse to rule out the mouse. Then go to step 3.
No: Try a dierent mouse or keyboard.
Now unplug the keyboard from the USB port on the back of the iMac, and plug the mouse 3.
into the port the keyboard had been in. Does the mouse work now?
Yes: Replace the keyboard?
No: It appears that your USB port isn’t functioning properly. Go on to step 4.
Replace the logic board.4.
My Apple wireless keyboard is not responding correctly.
Refer to Knowledge Base document 86496 - Apple Wireless Keyboard and Mouse:
Troubleshooting connection Issues.