12" Macbook retina suddenly dead & bricked

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.

Posted on Aug 31, 2018 3:37 PM

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Posted on Sep 5, 2018 4:17 PM

My a-1534 (early 2015 rMB) also failed suddenly several days ago. I was using it under battery power and it failed to power up again. I took it to the apple store and they said it's most likely a logic board failure. They were kind and helpful but at the end of the day a less than 2 year old machine breaking with normal use is un-acceptable. I have taken great care of this machine, never dropped it, always used the provided charger and kept it in a sleeve powered down during transport. I have only had the MacBook for about 2 years (I bought it after the 2016 model had arrived) and don't have apple care it only came with a 1 year warranty.


Apple quoted $575 to replace the logic board. This seems absurd to spend this much on a 3 year old machine as approximately 1/2 the cost of the machine. For a $1200 machine $600 dollars per year is pretty expensive. Now it seems if I have it repaired it's anyone's guess as to when it would fail again. To add insult to injury the SSD is soldered on the the logic board, so I can't get my data off. I hope my latest back up is recent. This is my first New apple laptop and quite frankly I'm very disappointed. I'll be looking other places in the future.

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Sep 5, 2018 4:17 PM in response to dexigner

My a-1534 (early 2015 rMB) also failed suddenly several days ago. I was using it under battery power and it failed to power up again. I took it to the apple store and they said it's most likely a logic board failure. They were kind and helpful but at the end of the day a less than 2 year old machine breaking with normal use is un-acceptable. I have taken great care of this machine, never dropped it, always used the provided charger and kept it in a sleeve powered down during transport. I have only had the MacBook for about 2 years (I bought it after the 2016 model had arrived) and don't have apple care it only came with a 1 year warranty.


Apple quoted $575 to replace the logic board. This seems absurd to spend this much on a 3 year old machine as approximately 1/2 the cost of the machine. For a $1200 machine $600 dollars per year is pretty expensive. Now it seems if I have it repaired it's anyone's guess as to when it would fail again. To add insult to injury the SSD is soldered on the the logic board, so I can't get my data off. I hope my latest back up is recent. This is my first New apple laptop and quite frankly I'm very disappointed. I'll be looking other places in the future.

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Sep 5, 2018 4:26 AM in response to dexigner

And if you were listening to Rossmann, he also talked about "AppleCare". My 12" 2015 MacBook would have been going for it's 3rd logic board replacement. The last repair they did on it was $1,400 worth of work, and the machine ran for exactly 3 minutes until, poof, failure.


I think Apple is aware of the situation. And, funny enough, I had mention what Rossmann had said when I took the machine back for its 3rd repair. I got a call from Apple yesterday, and they don't want to repair my MacBook again, but rather, they're handing me over a new 2017 MacBook. I will also get a pro-rated refund on my AppleCare (since I have about 10 months remaining). With the new MacBook, I am allowed to purchase the AppleCare again, which, I will.


I imagine at some point there should be either a recall to replace the defective U4700 chip, or the entire logic board with a good U4700 chip.


For that it's worth; the first logic board was replaced because the Bluetooth stopped working (unsure if related to the U4700), the second time was to replace the keyboard as the keys had all worn off (the paint), as well as a defective battery, they destroyed the logic board in the process. I am guessing they won't replace logic boards a 3rd time (or your 4th logic board, the 1st being the one that machine originally came with).


Again, though, Apple's willing to give me an upgrade might be a clue to just how much they know of this defective MacBook. I am just hoping the 2017 model is much better.

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Sep 5, 2018 10:57 AM in response to J E F F

Thanks for the info. I bought it from a EU country with 2 years of warranty and they don't offer AppleCare in every country.


Mine failed within the 18th month first, and got a new logic board under warranty. It's now almost three years old, but the logic board itself is only ~18 months old.

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12" Macbook retina suddenly dead & bricked

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