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Hi there and welcome to Just Answer, my name is ***** ***** I look forward to helping you.I’m sorry to hear you're having trouble. I know that can be frustrating. Hopefully, we can get this resolved quickly.Please disconnect the power cable to the computer then hold the power button in for 60 seconds then release.Then connect the power cable, power it on and tell me how it now functions.Please let me know the results.Thank you
Shut down your Mac.
Find Command (⌘), Option, P, and R on your keyboard.
Turn on your Mac.
Press and hold the Command-Option-P-R keys immediately after you hear the startup sound.
Hold these keys until the computer restarts and you hear the startup sound for a second time.
Release the keys.
Tell me how it then functions please