My Ipod touch 4G has a white screen. I've followed all the troubleshooting tips - turning off (hard to tell when all you see is white), hard reset, and restore. I updated to the latest software versions. Itunes recognizes the ipod. I restored it. Nothing changed. Still have the white screen. It hasn't been mishandled - no cracked screen, no water, hasn't been dropped. Any other suggestions or is it time to call Apple?