red screen tint on 07 20"

Discussion in 'iMac' started by stuartmac, Apr 20, 2014.

  1. stuartmac macrumors newbie

    Joined:
    May 21, 2013
    Location:
    Saint John NB.
    #1
    i recently tried to boot an imac that had been sitting for a while. i know it was working because i packed it away.

    it was completely dead, after a bit of diagnosis i replaced the power supply and it booted right up. After that the screen seams to be stuck in what looked like a low res low color mode but ive changed every setting i could think of.

    i replaced the display with the display out of my parts beast and it had no effect. some things look ok and something things look very wrong.

    I guess that leaves the video card but i dont have one since thats whats wrong with my spare as well. ( common issue apparently )

    Any other suggestions before i order a used video card.
    https://www.dropbox.com/s/390y158uluw9j0m/20140420_142115.jpg
     
  2. rambo47 macrumors 6502a

    rambo47

    Joined:
    Oct 3, 2010
    Location:
    Denville, NJ
    #2
    Resetting the PMU and re-calibrating your colorsync profile are commonly recommended. https://discussions.apple.com/message/2848058#2848058
     

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