13 "MBP 8.1 died strangely - but battery test as well

Material: MBP 8.1 (early 2011) - dual-core 2.7 GHz i7 / Intel HD Graphics 3000 / 8 GB RAM / 512 GB HD

Software: OSX 10.11.5

The battery & Techtool Pro from the current battery to 93% health (max 5368 / 5770 mAh), 408 cycles, cycle of 59.2% of remaining life, 12.4, 85.5 F Temp.

My Macbook Pro suddenly began to die if it is connected - and he dies in a very strange way.

  • If it is unplugged, it gets at halfway, then the progress bar stops, then it is replaced by a whited-out overlay, it hangs on and eventually fades to return with only the cursor arrow showing. If you plug it in while it's a failure, it will continue commissioning successfully.
  • If we do work disconnected, spikes of the use of the CPU to 100% (Activity Monitor), the fan turns on and the computer becomes incredibly slow to take any input. Eventually, it becomes black and fails.

If it is still plugged in, it will work normally. So far. Here's what I did:

  • A lot of hardware tests through Techtool Pro 8, starting from the eDrive (sensors, RAM, disk, battery, graphics, fans). All pass.
  • Full scan through Bitdefender for Mac. Pass.
  • SMC no help.
  • Taken a great local IT shop, who have used tools from Apple service provider to run tests of hardware on the motherboard, battery, etc. All passes.

Tests have limitations, and I can build a scenario that would pass the machine tests and still no this way. I really like my Macbook Pro (there the Spartans of Frank Miller on the cover) and she would rather than replace it with something. I could spend $100 to replace battery-, but there is no indication that this is the problem.

Anyone here ever seen or heard of something like that?

Does anyone have advice, ideas re: possible causes, or corrections that I've not considered?

Boot safe mode. Determine if it starts and runs in this mode, when it is connected to the power adapter and when not.

Tags: Notebooks

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