On numerous frustrating occasions I had this happen to me. It is always so frustrating, because I can't figure out what I did that made it work! This happens on a regular basis with my cell phone. It goes funny, then there is a blank screen, and then the call warning light goes on and poof it is dead. Then I take it all apart, take out the battery and the little card, blow on it a couple of times, and put it back together. Turn it on, and now it works.