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  1. #1
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    Angry USB Over Current Notice imac 24 mid 2007, Urgent, solution

    Hello guys I have an iMac did I decide to troubleshoot today , I have a question if someone want to reply that will be great.

    USB Over Current Notice iMac 24 mid 2007

    after 2 week of use, suddenly, got a popup says :
    using it with external Usb kvm switch

    also, kvm working perfectly with all my mac I have (iMac 20' 2007 etc. … , never got this problem

    Because a usb device was drawing too much power from your computer, one or more of your usb devices have been disabled.
    I disconnect my kvm most rapidly.

    But now ,every time a start my iMac 24" mid 2007
    got popup.
    tried reset SMC/Pram/boot safe mode/ .. nothing works
    sometimes, usb not working...

    all of you, how I can fix this problem ?
    without replacing motherboard

    I need to repair it, Solution ??

  2. #2
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    Re: USB Over Current Notice imac 24 mid 2007, Urgent, solution

    Could be the power delivery IC, I had one of these go on a MacBook Pro few years ago that came in with the same messages popping on the screen.

    However, you would need to find a schematics for the mainboard and troubleshoot the USB part of it. In most cases you can just remove the power IC, the USB will not work, but also there will not be any messages about too much power.

  3. #3
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    Re: USB Over Current Notice imac 24 mid 2007, Urgent, solution

    you said: just remove the power IC, the USB will not work

    this cpu got only 3 usb port.

    how can I use this cpu with usb not working?

  4. #4
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    Re: USB Over Current Notice imac 24 mid 2007, Urgent, solution

    Usually each USB port has its own power IC. Just remove the one that is causing trouble. Then the one of the USB ports will not be working, but who cares. You will need to find a schematics and troubleshoot it.

    I can check my schematics folder, but you would need to provide me with a board number (820-xxxx).

    But I don't know about your specific model, as it is too old and I never worked on any of the pre-2009 ones, as we had a bunch of these iMacs in the backroom that all had bad graphics cards and we just swapped the logic boards if we got any that needed to be fixed.

 

 

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