Lenovo laptop won't start up?

I starting having trouble with my Lenovo g50 laptop. I updated it to windows 10 last night and shut to off before going to bed. It was working this morning except for my microphone. I tried turning it off and back on to see if it would fix my mic and now it won't turn on. It get's to the lenovo logo screen, loads, and then goes black (the screen is still on). What could be the issue and how could I fix it?