I have had my 32gb for a week. It was charged up overnight, and wasn't keen on turning on this morning, took longer than usual. Showed some photos I transferred on it yesterday using bluetooth. Turned off. Turned on at lunchtime, read a few chapters of my book, turned off after 1hr. Plenty of battery left. Tried to turn on 6pm, nothing. Black screen, tried charging, got grey screen then whitish lines crossing the screen. PC World, say bring it in for exchange. I will mention this page to pc world. I tried the suggestions above, but nothing I'm afraid.