Screen is gray, but everything works fine!

Discussion in 'MacBook' started by KLF, May 31, 2012.

  1. KLF macrumors newbie

    Sep 17, 2009

    My Late 2008 Macbook 13.3/2.4/CTO with SSD, dropped on the floor.

    After that, the screen is gray, but backlight controls are working.

    The computer boots, and I can fully control it over VNC.
    I can even plug-in an external screen and everything is ok.

    What I've done so far:
    - safe-mode, using shift key: on the top screen there were some red letters saying "safe boot"
    - NVRAM reset: using cmd-opt-p-r I could hear the second chime
    - removed battery and charger for more than 5 min, pressed for some seconds the power button, and then plug battery again
    - installed latest updates for 10.7.4 OSX
    - keyboard back-light, keys, sound, mouse pad, all working fine
    - double checked that screen resolution is native (800 height)

    But... The screen is always gray. I can modify back-light luminance by using keybord, in order to move to max brightness or minimum brightness.

    What can I do next? Open case, remove some screen cables?

    I would appreciate experienced user's opinion.

  2. ABCellars macrumors newbie

    Apr 8, 2011
    It does sound like you compromised the connection of the LVDS/video cable or the cable itself has fractured internally where it goes through the hinge. Follow the guides on for help with checking the cable connection and/or cable replacement.

    Before taking the system apart to check the connection I would reset the SMC to see if that resolves the problem.
  3. KLF thread starter macrumors newbie

    Sep 17, 2009
    The diagnostic was correct!
    It was the video data cable, but fortunately it was only a little bit loose.

    I disconnected it and connected again, I got my video back.

    Here goes a screenshot to anyone who come to the same problem.

    Thanks for your tip. :)

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