21.5" IMAC with weird video issue on startup

Discussion in 'iMac' started by Wallierock, Jun 15, 2010.

  1. Wallierock macrumors newbie

    Jun 15, 2010
    Hi guys,

    I've recently noticed that when I start my imac it displays a weird pixelated white screen. It occurs right before the log in screen and it's intermittent(Sometimes the screen startup normally). My Imac has the radeon 4670 and I have already checked if there were any firmware/software updates I needed. I have also ran the apple hardware test as well, but it did not find any issues. I've took a screenshot of the problem(flickr link). Any suggestions?


  2. ice40i macrumors newbie

    Jun 18, 2010
    Did you ever figure out anything im having this same issue with mine as well but i have a 27" I5
  3. bigmacman macrumors member


    Jul 16, 2010
    That looks weird. Should contact Apple Care to find out what's going on.
  4. ice40i macrumors newbie

    Jun 18, 2010
    The funny thing is that i Hvae the exact same pattern on mine pixel for pixel blue screen on the bottom and everything

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