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computer will not boot up.   a circle with a line thru it appears.

216 Views 1 Reply Latest reply: Aug 26, 2013 7:56 AM by jason269 RSS
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Aug 23, 2013 6:57 PM

All of a sudden my computer will not boot up and a circle with a line thru it comes up.  What is the problem and what can I do to fix it?

MacBook Pro, OS X Mountain Lion (10.8.4)


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