Late 2012 27-inch Flickering Screen

Discussion in 'iMac' started by Hexley, Dec 17, 2014.

  1. Hexley macrumors 6502a

    Joined:
    Jun 10, 2009
    #1
    The flickering is as if you blinked and the brightness briefly dips then increases back to normal again.

    I hope this isn't a break down on the Mac as I do not have AppleCare on it. :mad:

    Electrical power (house lights) aren't flickering. I changed the powerstrip and the flickering reduced a bit.
     
  2. Hexley thread starter macrumors 6502a

    Joined:
    Jun 10, 2009
  3. iMi macrumors 6502a

    iMi

    Joined:
    Sep 13, 2014
    #3
    Try resetting VRAM to address the problem. Power down. Hold option+command+r+p. While holding down the buttons, power the machine back on. Chime will indicate the reset.

    Good luck. Post to let us know this helped.
     

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