Help! I updated my iPad Mini 4 to latest OS. Everything was ok until my son played with it until battery went to 2%. I did not charge it right away and when I finally did- a couple of hours after-- it wont turn on anymore. I left it to charge for a couple more hours thinking my battery went flat out and got drained. I charged it for another 2 hours and it still wont turn on. Tried pressing Home and Power button hoping it would go on reset, but nada. I also tried firing it by connecting ipad to macbook air and turning on itunes... Anybody have other suggestions? Ipad is already out of warranty. Should I just use this as an expensive paperweight?