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Early 2011 Macbook Pro shuts down during boot process

Macbook Pro suddenly stopped responding while in Safari and now won't boot up. Press the start button and the chime sounds, progress bar begins to load and when progress bar gets to about 25% level unit shuts down. Any ideas?

MacBook Pro, OS X Yosemite (10.10.2)

Posted on Mar 27, 2015 3:48 PM

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Early 2011 Macbook Pro shuts down during boot process

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