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Helpful answers
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Dec 15, 2015 4:42 PM in response to bb60rby PRC,Greetings
Unplug all external devices.
Restart holding down: OPTION COMMAND "R" and run diagnostics via the Apple Servers.
Not knowing what the Apple Store told you, good luck.
Patrick
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Dec 17, 2015 4:56 AM in response to cdhwby bb60r,it does not regonize the cd drive it will shut down at times does not transfer right to i phone and i pad.will not regonize printer
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