My Samsung Galaxy S2 Epic 4G won't power on anymore after an unexpected crash. The crash might have been provoked by too many running programs or my bad battery. When I took out the battery, I put it back in immediately. The start up screen would should but would not fully turn on. After taking the battery out and putting it back in again, the screen won't power on but the blue LED would turn on and stay on. Is there anything I could do to revive my phone?