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Helpful answers
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Jan 19, 2016 1:56 AM in response to nguidominicby D.Cohen,Take a look at the steps suggested by Apple in this article:
If your Mac won't turn on - Apple Support
Try Safe Boot:
- Shut down your Mac
- Wait until your computer turns off and after that press the Power button
- Right after you hear the startup tone, press and hold the Shift key
- Release the Shift key when you see a grey Apple sign and the progress bar below this sign
- After your Mac boots up, restart it as you usually do.
Apart from that, take a look at this Apple article and follow the instructions on Resetting NVRAM shown there: How to Reset NVRAM on your Mac - Apple Support
Try resetting the System Management Controller: https://support.apple.com/en-us/HT201295
Hope this helps! -
Jan 19, 2016 2:23 AM in response to nguidominicby nguidominic,hi D.Cohen
My computer just only can turn on , after show login user account , i key in password press enter , than after few sec my computer automatic shut down , totaly can't login , i try so many time still automatic shut down.
when i boot my macbook pro will show only lock profile
Firmware Passwort entfernen so what i need to key in ?
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Jan 19, 2016 4:22 AM in response to nguidominicby OGELTHORPE,It appears that you have to enter a Firmware password. If you do not know it, you will have to take the MBP to a Apple store:
https://support.apple.com/en-us/HT204455
Ciao.