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Thread: iMac Screen - Flickering w. 24 colors ???

  1. #1


    Member Since
    Nov 24, 2010
    Posts
    2
    Question iMac Screen - Flickering w. 24 colors ???
    Hi,

    So I turned on the iMac and it was running fine for about 5-10min when I noticed total loss of color to what looked like 24 colors and flickering... I tried to do the display firmware update 1.0 (I'm running MAC OS X 10.6.2) it gave me some alert that I don't need this update... All software is up to do...

    Any ideas?

    Attached a couple pics...

    Tks

    Attached Images Attached Images

  2. #2

    Buzzard2010's Avatar
    Member Since
    Oct 22, 2010
    Location
    Bretforton, Worcestershire
    Posts
    2,571
    Welcome to Mac-Forums
    Have you tried changing the settings in System Preferences > Displays?
    If so then try reseting PRAM and NVRAM, PRAM contains monitor depth etc.
    Guide on how to do this is here:
    Resetting your Mac's PRAM and NVRAM

    - Simon

    If you have been helped, don't forget to use the Reputation system at the top right of their post.
    May 2011
    Nominated: March 2011 & April 2011

  3. #3

    John T's Avatar
    Member Since
    Nov 06, 2010
    Location
    UK
    Posts
    60
    As you were advised in Macrumors, looks like your video card is bad. Apple are the best to advise.

  4. #4


    Member Since
    Nov 24, 2010
    Posts
    2
    Gpu :(
    Okay...

    I've tried system display settings w/out any success

    Tried resetting the PRAM and NVRAM, no love.

    Next step... Applecare.

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