macbook Pro A1286 Not Powering on!

Discussion in 'MacBook Pro' started by brogdan, Apr 6, 2015.

  1. brogdan macrumors newbie

    Apr 6, 2015
    i have a macbook pro A1286, MB no 820-2850-A
    Nothing happens when i press the power butoon., also tried to power it on by the pads on the MB but still noting.
    i tried SMC bypass (10 sec power button pressed, then another 10sec with charger connected) and it powers up, meaning the coollers spin for 1 sec then reboots when the 5v drops down, and so on.

    I noticed that i have no 5V on the L7220. the 5v on this coil only appears for a second then off for another 5-10 sec, and so on.
    i changed the ISL51125, i changed the 2 mosfets Q7225 and Q7220. and still the same.

    Also tried a new bios flash

    any ideea what can it be?
  2. DavidBlack macrumors 6502a


    Jan 27, 2013
    Somewhere In Apple's HQ ;)
  3. Samuelsan2001 macrumors 604

    Oct 24, 2013
    15.4 inch 2011???

    Your GPU is probably dead (radeongate you may have read about it.) Apple currently have a free repair program for this issue contact them and find out what you need to do in whichever country you are in.
  4. brogdan thread starter macrumors newbie

    Apr 6, 2015
    mine is a MacBook Pro (15-inch, Mid 2010) and it is not covered by the program and has warranty expired.

    AND mine has a NVIDIA video chip - N11F-GE1-W-A3

    also tried to reheat the GPU, but no signs of life
  5. Samuelsan2001 macrumors 604

    Oct 24, 2013
    That one .......

    ......had a repair program that ran out a couple of years ago.

    I am sorry I can't help you mate. It sounds like a complete logic board failure. So you can buy a second hand board replace it and hope for the best or buy a new computer.

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