Macbook Pro i7 15" (Mid-2012) No Backlight

Discussion in 'MacBook Pro' started by CasaOui, Jun 6, 2014.

  1. CasaOui, Jun 6, 2014
    Last edited: Jun 6, 2014

    CasaOui macrumors newbie

    Joined:
    Jun 6, 2014
    #1
    Hello everyone,

    I have this problem for over 2 moths and after searching the entire web for answers (youtube, macrumors, google etc) but with no success.

    The problem is that I had a wine accident with my MacBook Pro mid-2012 15" (A1286 EMC 2556). After this accident I've immediately disassembled the MacBook and cleaned the logic board with Isopropyl alcohol (96%) let it dry for two weeks while waiting for the new keyboard since I'm sure the keyboard takes the most damage in this cases. I also changed the cable (screen).

    So after two weeks I've received the keyboard and re-assembled the MacBook. Everything worked perfect for almost a week and after that the screen would turn black and stay that way until I restart the machine and again the same thing happens over and over.

    after a few days the MacBook powers up and play the apple sound but the screen stays black. With a flashlight I see the Apple Logo and after a while I can see the background (of my two kids) so the MacBook does power up and loads the OS, but nog backlight.

    I did a lot of searching just to find out where the responsible backlight inverter is or ic or chip or schematics, but no answers on the net. I do have experience with electronics and replacing things and also have the right equipment (rework/reballing/soldering station) but no idea what I should replace.

    I hope someone here can help me trough this. I've attached some pics of my logic board.

    Thanks
     

    Attached Files:

  2. Barney63 macrumors 6502a

    Barney63

    Joined:
    Jan 9, 2014
    Location:
    Bolton, UK.
    #2
    There is a "no backlight" thread here try posting there for more help.



    Barney
     
  3. CasaOui thread starter macrumors newbie

    Joined:
    Jun 6, 2014
  4. brdeveloper macrumors 68020

    brdeveloper

    Joined:
    Apr 21, 2010
    Location:
    Brasil
    #4
    What happened with the original screen cable?
     
  5. CasaOui thread starter macrumors newbie

    Joined:
    Jun 6, 2014
    #5
    Just to be sure I did buy a new cable. I still have the originele cable and I've tested both and still no backlight.
     
  6. donglory macrumors newbie

    Joined:
    Sep 8, 2016
    #6
    I had my backlight not working also. this is what i did after checking most component i realised the inverter Ic was not receiving power so i used a thin cable to bridge power to one leg and the light started working. hope it will work for you too
     

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