What is it? Display or GFX-Card?

Discussion in 'iMac' started by timbuk2, Feb 4, 2015.

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  1. timbuk2, Feb 4, 2015

    timbuk2 macrumors member

    Joined:
    Apr 22, 2005
    #1
    Hello,

    Got this rather strange display-errors after 1 week of vacation on my 27" mid-2011 imac.
    Is this a Display error or is it the gfx-card?

    It's not a static image. There is some strange flickering and different Images...
    See The Screenshots.

    Thank you for your hints
     

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  2. redheeler, Feb 4, 2015

    redheeler macrumors 603

    redheeler

    Joined:
    Oct 17, 2014
    #2
    Looks like the GPU is beginning to fail. The 27" 2011s are known to have defective GPUs, so much so that Apple even set up a replacement program. See this article:

    http://support.apple.com/en-us/HT203787
     
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