 It may have a sleep timer. This will automatically shut off the screen after a specific time. And if all else fails, you just have to go cold turkey. No TV if you can't turn it off. But I will tell you, I just got done. I know I was a little late to the game, but I just got done watching Dexter. That if you haven't seen Dexter, I know the premise is really weird. It's like a serial killer goes after bad guys and you're kind of rooting for him.