Late 2012 27-inch Flickering Screen

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

  1. Hexley macrumors 6502a

    Jun 10, 2009
    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

    Jun 10, 2009
  3. iMi macrumors 65816


    Sep 13, 2014
    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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