6P won't turn on after 7.1.1 beta download?

A

AC Question

Hello, I downloaded the 7.1.1 beta this morning and it seemed to go O.K. For some reason, a few hours later the phone just went to a black screen. It had enough battery but it will not turn on! I even tried plugging it in and holding the down volume and power button but nothing will get it to turn on. Please help! Whats the problem? Thanks.