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my mac book pro 2011 started having weird instances where it would just cut off and shut down immediately. Then when I tried powering it on, the indicator light would light up for 1 or 2 seconds before completely cutting off as if it were a power failure.

Sometimes I managed to boot it up again after waitint for awhile and I managed to do an aht test on it, revealing no problems with memory or the logic board.

What could be causing all this?

Edit: sometimes I get about 5 minutes of usage before it shuts down completely again.

Here's a video of how my mac is trying to boot up. https://youtu.be/wNEMUeyYfxY

  • Dead battery? Try something like Coconut Battery to check its health. – Tetsujin Oct 6 '16 at 18:34
  • Is it most likely a battery fault? Cause if it is I might have no choice but to get it repaired straight tomorrow. Its not booting up again. – Ler Ws Oct 6 '16 at 18:36
  • Hard to tell really - that would remove most doubt, though – Tetsujin Oct 6 '16 at 18:50
  • Just uploaded a video of how the mac responds to a power up with and without being plugged in. Fans start for a moment before power completely cuts out. – Ler Ws Oct 6 '16 at 18:51
  • Does it come on under outlet power? Is it only battery power where it shuts down? I can't see the video from my location <cough, work, cough>... – fsb Oct 6 '16 at 18:51
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The repairman said that it's a logic board failure. I sent it for repair and am currently waiting for news on what could be the cause. Anyway its gonna cost $350 sgd for the repairs.

  • did he say what exactly caused it or just that its a fault of some kind? most good shops should give you a description of what happened and why. – OzzieSpin Oct 8 '16 at 10:59
  • He hasn't done a full diagnostics yet. I guess he'll have to test every component with a multimeter and pair it up with the schematics etc. – Ler Ws Oct 8 '16 at 12:19
  • thats part of it, thou shall check voltages. then its checking if the SMC is on, if it is, he will then check if the circuitry generating the required power on signal is working, I could go on for a very long time but I will save that for somewhere more required. – OzzieSpin Oct 8 '16 at 14:21
  • Thanks man. Yeah probably gotta go through some extensive testing. I'll update you guys when I find out what's wrong. I hope the processor and other sensitive components are fully functional, I did an aht scan previously and during the phase where it keeps shutting down but the logic board tested fine. I hope it's just the power distribution circuit or something. – Ler Ws Oct 8 '16 at 14:23
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2011-2013 MacBook Pros have a problem with their graphic card!

The GPU is overheating and overheats the motherboard. As a result the leads get faulty resulting in unstable systems.

I went trough this.

There used to be a replacement programme.

Good luck!

  • Is there a workaround for that? – Ler Ws Oct 7 '16 at 1:03
  • But my graphics card never had any distortion problems. Plus I'm using Intel graphics card. – Ler Ws Oct 7 '16 at 1:06
  • This problem only happens with dedicated GPUs. In case your MBP does not have one than this does not apply. So maybe an exhausted battery as the other commenter suggested. – SEJU Oct 7 '16 at 4:00
  • In my case computer stopped working and turned off. Usually the screen would freeze, sometimes with strange artifacts on it. – SEJU Oct 7 '16 at 4:01
  • Ah that's definitely the GPU. I read it up online too. I'm gonna have it checked by a Mac repair shop later. I really hope it's the battery at fault and not the logic board. – Ler Ws Oct 7 '16 at 4:02

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