Imac with vertical lines on screen and crash, HELP!

Discussion in 'iMac' started by Ciatzo, Nov 25, 2013.

  1. Ciatzo macrumors newbie

    Joined:
    Nov 25, 2013
    #1
    Hi, so my imac from around 2009 crashed yesterday, while playing a free indie game. The game was not graphically intense, and the imac was running at no more than 50 degrees celsius. All of a sudden the screen became really blocky, like it stopped inbetween two frames, on half of the screen showing one frame, the other half showing a different frame. This in a checkerboard patern.

    At first i tought it was just the game crashing, since it was a indie game. But when i used te power button to turn of and on the iMac, a random pattern appeared on the screen, and after about two minutes it whitescreened. I left it at the whitescreen for over 2 hours, but it didnt change. [​IMG][/URL][/IMG]

    Then i started to worry. I looked up the problem, and found some threads.
    After trying some methods. Since i dont have the apple hardware test disk anymore i couldnt run that, i did reset the nvram and pram, and boot it in safe mode. In safe mode it did boot, but there were these giant lines on the screen[​IMG][/URL][/IMG]


    [​IMG]

    Also i can't acces the internet in safe mode, altough i don't know if this is normal.

    I did just back-up all my stuff on the iMac, and will probarbly visit the genius bar sometime this week, but if anybody know this issue and how to fix it, please tell me.

    I did attach a picture of the about this mac section.

    [​IMG]
     

    Attached Files:

  2. IA64 macrumors 6502

    Joined:
    Nov 8, 2013
    #2
    Same old story here. It was a corrupted video card due to overheating.

    It will boot under OSX safe boot or Bootcamp safe mode because the drivers aren't loaded.

    In my situation, when I boot in safe mode and keep it for a while or try to load some video stuff, the lines disappear and reappear. I had to install iStats pro and push the fans to the max to keep the card under control.

    I ordered another iMac since mine was a late 2009 but long story short, it was the video card in my case.
     
  3. CoMoMacUser macrumors 6502a

    Joined:
    Jun 28, 2012
    #3
    I had a similar problem with my 2008 iMac, and the cause was a logic board that went bad.
     

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