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iMac (Lion) hangs after boot sequence

133 Views 4 Replies Latest reply: Jun 21, 2013 1:03 PM by mende1 RSS
DrLG Calculating status...
Currently Being Moderated
Jun 21, 2013 12:34 PM

The iMac  is only about a year old, the 27” screen version running OS 10.7 Lion; just this morning I was watching a movie file on it, and it just went poof—I got a red screen with tiny black squares (never seen that before); I shut it down and restarted, it went through the boot sequence (saw the gray apple), and then went black, and right when it should have shown the desktop with background picture and icons, it instead showed (and continues to show) a solid white screen.  I unplugged it and held the power button to purge all power, and then start it again holding Apple and V down; I got a black screen with a bunch of information that disappeared in about ten seconds, and then reverted to the white screen.

iMac, Mac OS X (10.7.1)
  • rkaufmann87 Level 8 Level 8 (40,500 points)
    Currently Being Moderated
    Jun 21, 2013 12:52 PM (in response to DrLG)

    Sounds like a hardware failure, did you get AppleCare covereage on it? If so then give AppleCare a call, if not I'd recommend a trip to your local Apple Store or AASP.

  • mende1 Level 10 Level 10 (89,460 points)
    Currently Being Moderated
    Jun 21, 2013 12:53 PM (in response to DrLG)

    From what you say, it looks like your graphic card is damaged. You can't start OS X because graphic drivers can't start. You should be able to start in safe mode, holding the Shift key while your computer is starting.


    Late 2009 and newer iMacs have got a replaceable graphic card, so repair is much cheaper. Take your iMac to an Apple Store or reseller

  • mende1 Level 10 Level 10 (89,460 points)
    Currently Being Moderated
    Jun 21, 2013 1:03 PM (in response to DrLG)

    Be careful. If it's really a graphic card problem (this type of problem appears and disappears randomly), it will appear soon. My iMac had its graphic card damaged and it worked during some minutes until it stopped working


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