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Released October 2008 / 2.4, 2.53, 2.66, 2.8 or 2.93 GHz Core 2 Duo Processor

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MacBook Pro won't shut down - keeps restarting

Hello,

my MBP (2009 2,66GHZ) is showing a very strange behaviour.

Whenever I shut it down (Power button or Apple menue) it shuts down fine and once it is powered down immediatly starts up again.

First I thought the power button was stuck or the keyboard cable not properly inserted, but even with the keyboard disconnected it keeps doing it.

When running there it performs flawlessly.

- SMC or VRAM reset has not led to any change.

- I switched the MB for one that is knowingly good and the computer worked fine, so it is some issue related to the logic board.

Has anyone got an idea as to what the problem might be related to?

I appreciate any answers.

BR

!BATTA!

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My answer may seem strange. First see if will boot from your original system installation disk. If it will go to the second screen pull down menu and verify the disk with Disk Utilities. DO NOT REPAIR THE DRIVE. Just let me know your results.

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I would replace the ram with known working memory sticks.

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I had this exact same problem with my Macbook Pro. The problem was fixed when I replaced the old and dying battery with a new one. I'm not sure why, but I would give this a try if you have this problem and your battery is on it's last legs.

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i have macboon pro 2012mid whenever i shutdown my mac its again start ( i mean restart my mac) i tried nvram smc and reinstall my mac but same problem iam facing

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Batta sarà eternamente grato.
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