I was using my ipod last night fully charged. Turned it off and went to sleep. Now it only turns on when its plugged into the wall or computer. If I pull it out it will turn off and when I plug it back it does the same thing loads up from apple logo to menu. It says fully charged when its plugged in.. All I've done to it is restored it but it didnt work. I am a new ipod user so any help. thanks