Keyboard Stops Working

Discussion in 'Mac Accessories' started by ItchyBone, Feb 10, 2011.

  1. ItchyBone macrumors newbie

    Feb 10, 2011

    I did some long searches and found others having this problem from back in 2008 that software updates seemed to fix...but my software is up to date and I am still having the issue.

    I am having a problem with my iMac keyboard stopping working sporadically. It seems to happen most when I let the machine go to Sleep, but it is not constrained to those times alone. My son has had problems while playing video games as well. The mouse has occasionally had the same problem, but with much less regularity. I have been unable to recreate the problem by intentionally putting the iMac to sleep or using the upper left corner of the screen.

    In order to fix the problem I only have to unplug and then replug the keyboard back into a USB port on the back of the iMac. I have used each of the different USB ports and have experienced the same results. I have also tried SMC Resets and PRAM Resets.

    Below are my iMac details, any ideas would be greatly appreciated!


    iMac 2.4 GHzIntel Core 2 Duo with Mac OS X version 10.6.6 (I have also run the software update)
    Using the standard white Apple USB Keyboard that came with the machine
  2. Webstertiums macrumors newbie

    Feb 12, 2011
    Workaround for a similar problem

    Hi, I have a similar problem with my one of my Macs. It's an iMac that is a little older than yours (specs below) but same operating system. Whenever I connect a scanner or printer or ipod, etc, to one of the usb ports, the keyboard stops responding. If I unplug the keyboard, connect my devices, and then make sure the keyboard is the last thing connected, it works fine. If it isn't the last thing connected, no keyboard. When the mouse is connected to a port on the keyboard, it stops working when the keyboard stops. If the mouse is plugged in to the back of the iMac, it continues to work just fine regardless of what the keyboard does.

    I think I found a workaround to the problem. Yesterday I added an external and independently powered USB hub to the setup ($8 on eBay). I've now got the keyboard and the mouse connected to the powered hub. With that in place, anything else that I connect to the hub or to the back of the machine causes no disruption. Keyboard now works as it should. Not sure if this will help solve your problem, but I hope it helps!

    iMac is a 2GHz, Intel core 2 duo, running OS 10.6.6.
  3. ItchyBone thread starter macrumors newbie

    Feb 10, 2011
    Problem solved

    Webstertiums - Sounds like a good try for a solution with what I was experiencing as well. I had similar issues with my mouse depending on where it was plugged in, if I have the problem again, I will give this a try!

    It looks like changing out my keyboard has fixed the problem. I am still not sure why this is the case, if a keyboard is faulty, unplugging and then plugging it back in doesn't seem like it should fix the keyboard, but with a new keyboard plugged in, I haven't had the same problem back.

Share This Page