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All replies
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Helpful answers
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Jun 6, 2015 11:35 AM in response to coatliqueby dominic23,Reset SMC. Choose the method for “On Mac notebooks with non-removable battery”.
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Jun 8, 2015 8:33 PM in response to coatliqueby coatlique,Resetting SMC didn't work noise still there.
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Jun 9, 2015 2:59 AM in response to coatliqueby OGELTHORPE,Run an Apple Hardware Test:
https://support.apple.com/en-us/HT201257
Note that an error free AHT is not definitive.
Ciao.