Display Problems on iMac! Please help

Discussion in 'iMac' started by davidsonwildcat, Sep 6, 2013.

  1. davidsonwildcat macrumors newbie

    Joined:
    Sep 4, 2013
    #1
    [​IMG]

    Can anyone help me diagnose this problem? This is what happens to my screen after using this computer for more than an hour. I know it's not a display problem because when I connect the iMac to my TV, I see the same problem on the other display.

    Can anyone please help me diagnose this/suggest some troubleshooting tips? I'm out of Applecare :(

    Thanks!
     
  2. malvicus macrumors member

    Joined:
    Jul 28, 2013
    #2
    If you see this problem on a different display, then it is most likely a video card problem. Unfortunately, you can't just replace the card. You have to replace the entire logic board. If you don't have applecare (or if it has expired) then this is a pricey fix.
     
  3. dtjay7 macrumors regular

    Joined:
    Jul 25, 2008
    Location:
    N. CA
    #3
    I had a similar problem on another iMac. It is maybe heat related. I put SMC fan control on it and increased the speed of the fans. That worked but it is a sign of a failing graphics processor. Yours may be something different but it may be worth a try.
     
  4. malvicus macrumors member

    Joined:
    Jul 28, 2013
    #4
    OOh ya, especially after an hour, it could most likely be fan related. The overheating could eventually result in damaged video card. If you take it in for repair, they can diagnose your cooling system. Repairing that may not be as pricey but I dunno. I'm no tech. Hopefully, repairing the fan and finding out that you don't have to replace your logic board is all that is needed.
     
  5. Johnf1285 macrumors 6502a

    Johnf1285

    Joined:
    Dec 25, 2010
    Location:
    New Jersey
    #5
    Would this happen to be a 24" with the 8800gs card?
     

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