Question about Apple iMac 24" Desktop

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Keyboard and Mouse don't work anymore

I was using my iMac Al 20', everything was working fine, and after I did what I had to do, I shut it off, to go to bed, then I remember that I had to pay a bill, and turn it back on, but when it start up I noticed that my mouse wasn't working, I've tried my keyboard and noticed it didn't work also ( don't know about the remote, forgot to try it ).

I pick up my mouse and noticed that it was 'turned off' ( no light below it ), so I've unplugged and plugged it back again, the mouse turned on, but it still didn't move ( the cursor were at the apple on the top ).

I've tried to change the mouse from the keyboard usb to the computer usb, same result, tried to change the keyboard usb, unplugged an old iPod that I use as a backup drive ( through firewire connection ) unplug the cable that I use to sync my iPhone, nothing worked.

Can anyone help me here?

Marcelo Wolfgang

Posted by on

  • msimonmw Jan 13, 2009

    Update from latest test yesterday.

    The 3 USB ports behind the screen 'don't work', but the firewire port is OK.

    I've plugged an old iPod in the firewire and it synced OK, I've tried
    to plug my iPhone in the 3 usb ports with no success. I've also tried
    to plug another keyboard unsuccessfully.

    Also I've noticed that when I start the system the mouse laser is on,
    but as soon as the apple logo shows in the screen it turn off the

    Also the apple mouse is the only thing that I can plug to the usb ports ( after it has been turned off ) that come back on.

    Please help, what should I do?

  • slijmgaard Feb 08, 2009

    i've also plugged my camera in and now I have the same problems as msimonnw's


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Hi, Sorry you are having problems,
Well Marcelo, the first thing to do in a situation like this is to restart your Mac or even better, shut down and restart. So, if you have done this, and still the keyboard and mouse don't respond, and, as you have mentioned, you have tried the other USB ports on the back of the Mac, it sounds like somehow, unexpectedly, your iMac motherboard got a shock of some kind and it killed the USB controller....
Last thing to try is to unplug the iMac completely of everything and let it sit for 10 minutes and then plug just the keyboard and mouse back in and try to see if that does the trick..
Otherwise, Apple will cover this if it is still under warranty.
Good Luck.

Posted on Apr 02, 2009

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