okay, so ive had my macbook for just over a year now. only a couple days ago, when i had only closed the computer and not turned it off or anything like that, when i open it up, the screen will not come on. ive had to restart it 10+ times in only a few days. i think that the computer does not realize that it has been opened, because the apple that lights up when you use the computer does not light up. the computer acts completely fine when restarted, but its just getting on my nerves. has this ever happened to anyone else or does anyone know what to do?