iMac 24 2008: installation froze and throw garbage display

Discussion in 'iMac' started by necromac, Apr 27, 2016.

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  1. necromac, Apr 27, 2016

    necromac macrumors newbie

    necromac

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    #1
    Hello,

    I bought a used iMac 24 2008. I thought it was just a HDD issue because it does chime, it does show apple logo and it has clear display. But when I did the installation, it does progress but at some point, around 70% it just display garbage. (please see attachment.)

    anyone can help me on this? any experience like this? how did you resolve the issue?
     

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  2. CoastalOR, Apr 27, 2016

    CoastalOR macrumors 68000

    CoastalOR

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    #2
    What is "the installation"?

    It does look like a video driver or more likely a video hardware (GPU) problem.
     
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  3. ddmcnair, Apr 27, 2016

    ddmcnair macrumors member

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    #3
    I looked at several iMac 2008 pictures and it appears there is a heat sink beside the memory, DOH! I would try swapping out the memory.
     
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  4. necromac, Apr 27, 2016

    necromac thread starter macrumors newbie

    necromac

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    #4
    @ddmcnair: memory? you mean RAM right? but the RAM are new... HDD is new...

    @CoastalOR: I am suspecting that its the Video card. But it is wierd because before that screenshot, it display fine. i hold the Option button, and let me select my DVDROM or EFI boot USB stick, the display is vivid clear.

    But when i select any mac os x installer (DVD or USB) and when it reach to 70% of loading the installer, it just crash and showing like that on the screenshot.
     
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  5. maflynn, Apr 28, 2016

    maflynn Moderator

    maflynn

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    #5
    Yeah, those type of symptoms tend to illustrate a failing GPU, so that would be my guess.
     
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  6. necromac, Apr 28, 2016

    necromac thread starter macrumors newbie

    necromac

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    #6
    hey guess what.. i rework the GPU, working now. yey! hehehe.. thanks guys..
     
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