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  1. #1


    Member Since
    Dec 25, 2008
    Posts
    7
    Macbook Pro 17" 2009 display glitches regardless of GPU. Help?
    The display has started having a lot of color distortion and artifacts. Here is a picture to illustrate some of them:



    I tried switching between the 9400M and the 9600GT GPU but it has no effect on this. I also tried turning it off and rebooting.

    I tried booting in Windows 7 and the problem is there.

    At the OS selection screen, the problem is also apparent.

    This happens even after if the computer was turned off for the night and cool to the touch.

    It showed all of a sudden last night and it does not disappear.

    This is a 17" Macbook Pro 2.8Ghz C2D 9400m/9600gt last generation. Purchased in October 2009. It's 19 months old.

    I don't have a minidisplay port adapter so I can't test it on an external screen yet.

    Any ideas on how to diagnose this further? Has anyone ever heard of such a problem even? You'd think even if one GPU fried, the other would carry on. Do they share VRAM? Could the VRAM be bad?

    Thank you for your time.

  2. #2

    Lifeisabeach's Avatar
    Member Since
    Sep 30, 2007
    Location
    The Republic of Neptune
    Posts
    7,754
    It's definitely hardware. The display itself rather than the GPU is the more obvious culprit.

    Please verify and include the exact model/year of your Mac and OS X version number (available from "About This Mac", then "More Info" on the Apple menu).
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  3. #3

    bobtomay's Avatar
    Member Since
    Dec 22, 2006
    Location
    Texas, where else?
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    26,494
    Specs:
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
    Yep, looks to be the monitor itself.

    Take a screen shot. Typically, if the screen shot is ok, it's a display problem. If the screen shot shows what you see, then it would be GPU related.

    If you've got Applecare, it's time to give them a call.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  4. #4


    Member Since
    Dec 25, 2008
    Posts
    7
    Quote Originally Posted by bobtomay View Post
    Yep, looks to be the monitor itself.

    Take a screen shot. Typically, if the screen shot is ok, it's a display problem. If the screen shot shows what you see, then it would be GPU related.
    The screenshot looks fine.

    And, thanks to you, I decided to slam the mac against my desk and the problem went away. I must've bumped it against a car door or something yesterday to cause the problem (obviously a displaced video ribbon, in hindsight).

    You're the man.

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