Backlight works but no image - MacBook Pro

Discussion in 'MacBook' started by slavikf, Oct 20, 2010.

  1. slavikf macrumors newbie

    Joined:
    Oct 20, 2010
    #1
    Hello everyone. Would like to see if I could get some help here. I have a 2.2GHz Core 2 Duo 15" MacBook Pro and my display went out. I can see the backlight and can even adjust it when I push the brightness buttons but get no image on the screen. First thing I did was hook up an external display and I got an image and 2 minutes later, the image came back on the laptop. I disconnected and rebooted the computer and everything was fine. Next morning it doesn't work again. So I ordered a video/flex display cable and replaced it and that did not do the trick. Still get the same result. Anyone have any ideas? I will be hooking it up to the external display again to see if it works. Thanks in advance for all the help I can get.
     
  2. Meganld13 macrumors newbie

    Joined:
    Mar 5, 2012
    #2
    I have this exact same problem, anybody know how to fix??
     
  3. healeydave macrumors regular

    Joined:
    Jan 12, 2008
    #3
    Someone just gave me a Macbook Pro to look at, with the same fault.

    Shame, I seem to be finding plenty of examples of the same symptoms, often in from similar circumstances, but not solutions :(

    The guy said his Macbook took a small fall off the bed. The display has come back on but has gone off again. I have repaired some backlight issues previously but the backlight is fine, I can see the screen flicker it on when powering up but no output on the screen. Behind the scenes, I can tell the Macbook is booting fine.
     
  4. pfu macrumors newbie

    Joined:
    May 30, 2013
    Location:
    deep recess of the internet
    #4
    just a suggestion. if you can pop it open (the lid) check for loose connections, there's a cool guide with pics on ifixit.com check that out.

    goodluck
     
  5. l.a.rossmann macrumors 65816

    l.a.rossmann

    Joined:
    May 15, 2009
    Location:
    Brooklyn
    #5
    Image, no backlight = motherboard
    no image, no backlight = screen
    no image, backlight = cable

    This isn't exact, but most of the time.

    Unplug the video cable, and plug it back in. Keep the battery unplugged, of course.
     
  6. healeydave macrumors regular

    Joined:
    Jan 12, 2008
    #6
    Thanks for the replies.

    I suspect its a GPU problem or perhaps a problem with the LDVS connector inside the screen as I have checked the connector to the main board and its perfect.

    I tried a mini-display port cable connecting the Thunderbolt port on the Macbook to an iMac, I still didn't get any output but I'm not even sure if thats a valid connection anymore. I love Apple but the way they keep changing the goal posts on what year iMac / Mackbook will work with which ever cable is one of the most annoying things they do, unfortunately its the only cable I have so my options are now exhausted without wasting $30 on a Thunderbolt cable.

    I can tell by the unit's activity, e.g. holding down option when powering on to save having to power it off blind and seeing the backlight come on at the chime etc leads me to believe either the GPU has become dislodged (similar to a lead re-balling requirement) or the cable inside the LCD has become dislodged because otherwise its a very clean unit and shows no signs of physical damage to the main board and no signs of historic liquid spillage either!
     

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