HT204267: If your Mac won't turn on
Learn about If your Mac won't turn on
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Helpful answers
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Mar 24, 2015 3:05 PM in response to sassybizby OGELTHORPE,★HelpfulIt would be helpful if you indicated the EXACT model/year MBP that you have.
Try this:
reset SMC and NVRAM:
https://support.apple.com/en-us/HT201295
https://support.apple.com/en-us/HT204063
Then try a safe boot:
https://support.apple.com/en-us/HT201262
Ciao.
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Mar 24, 2015 3:08 PM in response to sassybizby Kappy,★HelpfulThe best I can suggest is Intel-based Macs: Resetting the System Management Controller (SMC) and Resetting your Mac's PRAM and NVRAM.