I have an iPad 2 that is not showing up in iTunes when plugged into my MacBook Pro. It is also in a constant state of "restarting" and cycles through the low battery screen, the Apple logo screen, and a black screen. All of this happened after it died the last time I used it. I have tried to reset it but that hasn't worked, and since it doesn't show up in iTunes I am unsure of what else to do. Any help would be much appreciated!