Imac 27 (2010) shows white screen

Discussion in 'iMac' started by jacobDK, Apr 1, 2015.

  1. jacobDK macrumors newbie

    Joined:
    Apr 1, 2015
    #1
    My IMac 27" shows five vertical stripes on a white background when I turn it on, while also showing the progress bar for starting up.
    After that the screen turns completely white and only shows the mouse arrow with thin horisontal lines around it. It stays that way.
    The IMac uses the latest IOS.
    Any good ideas? Thanks a lot, Jacob
     
  2. redheeler, Apr 1, 2015
    Last edited: Apr 1, 2015

    redheeler macrumors 603

    redheeler

    Joined:
    Oct 17, 2014
    #2
    Sounds like a failing GPU.

    Edit: Try booting to Recovery (hold down Command-R at boot) to see if something similar happens.
     
  3. jacobDK thread starter macrumors newbie

    Joined:
    Apr 1, 2015
    #3
    Tried Command-R at boot. Get a list of options (re-install OS X, recover from time-machine etc). So the computer reacts to input.
    I can select theses options and open a browser to go to apple help page, open disk aid and so on. The vertical stripes are still there.

    When I reboot the stripes are stille there while mac boots and then the screen goes to pitch black - which is new - and stays there. I can hear the harddrive working as normal.

    Sounds like I should get a new GPU?

    Thanx a lot for your help, redheeler!
     
  4. redheeler macrumors 603

    redheeler

    Joined:
    Oct 17, 2014
    #4
    If you can boot into Recovery without issue do an OS reinstall from there.
     
  5. jacobDK thread starter macrumors newbie

    Joined:
    Apr 1, 2015
    #5
    Did an OS reinstall. The vertical stripes showed all the way through the proces. When mac restarted it still showed the vertical stripes at boot and then the white screen as before ...
     
  6. redheeler macrumors 603

    redheeler

    Joined:
    Oct 17, 2014
    #6
    Then it's likely a failing GPU as I had guessed. While the GPU is replaceable in that model it's not an easy or cheap repair and probably not worth it for your 4+ year old machine.
     
  7. jacobDK thread starter macrumors newbie

    Joined:
    Apr 1, 2015
    #7
    I will ask my local service centers for a replacement price.

    Thanks a lot for your advice redheeler - it has been a great help for me!
     
  8. willmtaylor macrumors G3

    willmtaylor

    Joined:
    Oct 31, 2009
    Location:
    A Natural State
    #8
    I know it's been a long time, but I've just started having an identical issues with my 27" 2009 iMac 11,1.

    What did you end up doing?
     

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