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Loses power shuts down and restarts

My MacBook Pro Loses power suddenly and sometimes restarts itself. I replaced all the RAM and it is still doing it. I cleaned the fans and inside. The battery seems to be charging fine. Not sure what it could be?

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2 Comments:

does have an overheating issues i had the same problem with my old MBP and i applied new thermal paste to the CPU and GPU. that solved my problem. and you may need to repair the permission from disk utility it may help.

good luck

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Please be specific about your exact machine. There are know issues on some of these machines.

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