My iPhone 5s' screen is black and won't turn back on, how can I fix this?

[iMore Question]

My iPhone 5s' screen is black and won't turn back on.

I tried to update an app, and when I did the phone turned black except for the top bar (time, battery, wifi) and I clicked the lock button and now the screen is only black. The phone vibrates when I charge it, and the phone vibrates when change the ringer from off to on. Please help!

 

[Reparkable]

Re: My iPhone 5s' screen is black and won't turn back on.

Have you tried to reset the phone?

 

[Coachbulldog]

Re: My iPhone 5s' screen is black and won't turn back on.

What app?

Is your phone jail broken?