Failed to start; dark screen extended

On the attempt to start, the screen was black. Screen brightness then returned; It appeared that I was in 'safe mode' and that, perhaps, I forgot my password. I then initiated a reboot, but the same cycle repeated, starting with a black screen. Help. MacBook Pro OS X El Capitan.

Reset the NVRAM/PRAM memory.  http://support.Apple.com/kb/PH18761

Reset the SMC. Choose the method for "on Mac Laptops with non-removable battery.

https://support.Apple.com/en-us/HT201295

If this does not help, please contact Apple.

Click 'Contact Support' at the top right of this page.

Tags: Notebooks

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    Thahaseena M
    Microsoft Answers Support Engineer.
    Visit our Microsoft answers feedback Forum and let us know what you think.

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