12" Macbook retina bricked

Discussion in 'MacBook' started by leventozler, Aug 31, 2018.

  1. leventozler macrumors 6502

    Feb 18, 2009
    A few weeks ago, while working, my 2015 12" retina macbook suddenly shutdown. It was plugged in, and was almost warm, not even hot.

    I tried holding power button, resetting SMC, trying different key combinations etc., but it was dead. Researched the situation as best as I can, but all I can find were a couple of tips that didn't help.

    I waited a couple of hours, tried some more key combinations, and it was still dead. Than I stumbled upon a video from Louis Rossmann.

    According to Rossmann "the U4700 USB-C communication controller on the Logic Board fails, resulting in a low input voltage on the PP3V3R3V0_A0N (Always On) rail. The result is a computer that won’t charge or power on."

    Just like in the video, when plugged in, the bottom of my Macbook gets warmer (probably from the short). That's when I lost all hope, my 3 years old Macbook, with its 1.5 years old motherboard (it was replaced when graphics failed within ~18 months) was a brick.

    Apple quoted me ~$500 to replace the motherboard, but previous two didn't last more than 1.5 years and I don't want to spend almost half of its retail for something probably won't last a couple of years.

    Anyway, it took me all day to figure it out, so if your 12" Macbook 2015 A1534 suddenly shuts down and won't turn back on, and its bottom gets warm when plugged, it's probably U4700 IC failure.
  2. EugW macrumors 603


    Jun 18, 2017
  3. leventozler thread starter macrumors 6502

    Feb 18, 2009
    Yep, apparently they switched to some other chip for 2016 models.
  4. nburwell macrumors 601


    May 6, 2008
    Wonderful. I just purchased an early 2015 12" MacBook from Swappa a couple weeks ago. I'll have to check if mine is A1534.
  5. sosumi99 macrumors 6502


    Oct 27, 2003
    Brutal. Sorry to hear about your experience, OP, and thanks for the post.
  6. icymountain macrumors 6502

    Dec 12, 2006
    How about sending it to Louis ? He would probably charge much less than that and make it a very worthwhile repair.
  7. leventozler thread starter macrumors 6502

    Feb 18, 2009
    I won't be in the States for a while, and I don't trust some local repair shop. I'll wait a couple of months for a repair extension program, but according to this post even Apple doesn't prefer a repair and instead offered replacing it with a 2017 version.
  8. fokmik macrumors 68040

    Oct 28, 2016
    if this was an issue with all 2015...i think a lot of people would complain in 3 years.
  9. hspace macrumors regular


    Oct 13, 2011
    Indeed. My wife's 2015 rMB has run great for over two years, and still does everything she needs just fine.
  10. leventozler thread starter macrumors 6502

    Feb 18, 2009
    Never said all of them have this problem. I wasted half a day trying plugging it in and out, holding power button 30+ seconds and countless different key combinations. I hope the original post would help others diagnose the problem.

    BTW, I never experienced the 'touch disease' myself, which doesn't mean there isn't anything wrong with that model.

    2015 macbook died twice on me, and I'm not going to spend $500 for a board that might not last another 1-2 years.
  11. minik macrumors 65816

    Jun 25, 2007
    Bellevue, WA
    At work, I have a 2015 MacBook with dead SSD. The Genius at the store said it's very rare to fail liked this. Since it's 4 months out of warranty, not worth the $475 plus $100 labor to extend the life.
  12. tfking macrumors newbie

    Dec 5, 2016

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11 August 31, 2018