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Helpful answers
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Jun 10, 2016 5:25 AM in response to dinithfdoby OGELTHORPE,You could try a NVRAM reset:
https://support.apple.com/en-us/HT204063
You might run an Apple Hardware Test:
https://support.apple.com/en-us/HT201257
Note that an error free AHT is not conclusive.
The best option is an appointment at an Apple store genius bar for a FREE evaluation.
Ciao.