My Phone Won't Work

[Android Question]

I own a Samsung Epic 4g, the one with the keyboard. I fell asleep on the phone one night, and now the screen won't turn on. The phone works though, I know that may be confusing. So I made sure to put the phone on the charger when I woke up. When I took it off, and I pressed the power button the keys lit up on the keyboard, and on sense keys on the bottom of the phone. The only thing that doesn't turn on is my screen. I've tried to reset it multiple times, but it isn't working. I don't know what else I could do.
PS: Carrier: Sprint