My son was using his touch today to surf the net for a long time. it crashed on him. All it would do is go to a white screen. I plugged it in and itunes showed everything on it. It said it needed the latest software update so i tried it. It asked if i wanted to do a backup and i did. It then went through the process and when it was installing the software it asked something about restoring and I said yes. The Ipod then disappeared off of Itunes, and the computer. The ipod will do nothing at all, like it is turned off and it wont even try to turn on. When I plug it back into the computer, it doesn't even see it. What do i do next or is he S.O.L.?