I have had this same issue. I sent tried all the suggestions, cleared I pad to factory, reloaded with iTunes ,nothing worked. I sent it in for repair, and it worked great for a week. Today it started doing the same thing again ! I am so frustrated. I must say I was impressed with the service from Apple,they paid for shipping and I had my IPad back in 3 days, but now I have to send it in again ?? I am wondering how many people really have this problem and will it ever get resolved ? I am calling service dept. now to see what to do. Sorry to hear yours is doing the same thing. I would suggest you call and send it in with your warranty.