2011년 상반 모델, A1278 / 2.3 GHz i5 또는 2.7 GHz i7 프로세서.

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MBP turns black and stays blocked. Power loss

Hi

My MBP switches suddenly off, black screen and not a single status light nothing.

This happens significantly when i shake the book or when i tap with my fingers on top of the book .

Or when i move the book around

After that the only way to wake the macbook is to open the case and disconnect the battery for 10 sec.

I tried PMC reset everything nothing helps.

I tried removing the RAM for proper connectivity,

plugged all cable on the motherboard in and out .

Finally i replaced the harddisk. still no success.

Is the motherboard broken or is this a cable connectivity issue ?

Has it to do with the power source circuit ?

Many thanks for your help

Andy H. Switzerland Europe

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Might be a cracked battery. I had one that you couldn't see the crack in the battery unless you lifted the battery out of the case. Apparently when the MBA was moved from place to place (while off) the torque on the case would open/close the crack.

FWIW you sound pretty rough with that box. Laptops are not meant to be carried around or thumped on. Portable means small enough to move from location to location - they are not phones or iPads with SSD drives. Spinning platters on HDs can receive permanent physical damage by collisions of the read/write heads.

If this answer is acceptable please remember to return and mark it.

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