iPhone will not turn on and the screen is completely black

Well I have had my iPhone for about a year now and it has had some trouble. I have had to take it back to the Apple store twice to try and fix it. Well today I dropped it and even though I had an Otterbox, it went black. I have tried the home and sleep button easy fix, but it is not working. The screen is still completely black, but it is not cracked or anything. I had 75% battery so it was not anything to do with that. Is there any way I can fix it?

Message was edited by: alexiclaire