iMac 21.5 inch display issue (mid 2010)

Discussion in 'iMac' started by fredsarran, May 4, 2011.

  1. fredsarran macrumors 6502


    Jun 15, 2008

    I have the display looking all scrambled during the transition between the boot up screen and login screen (only for 3 seconds or so) :


    However, the display is fine once logged in. What is the problem ? I phoned Apple and they have no clue.

    This screen problem randomly happens, it does not happen every time.

    Thanks for any help,
  2. fredsarran thread starter macrumors 6502


    Jun 15, 2008
    Solution !!

    Ok, so Apple replaced the Graphic card and issue still happening. After a lot of brain storming, I deleted one by one apps/software that starts at the same time the issue is happening, and I discovered it is the Air Display app by Avatron that creates the problem.

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