Ursprünglicher Beitrag von: Nick Kane ,
open it up. remove battery. push al buttons for 10 seconds to release any current in the device. open device up. remove al flex cables and leave for 20mins. refit all flex cables, insert a new or full charged battery and power on, or use volume up, power and home to get to firmware screen.... if nothing leave on a WALL charger overnight, don't use USB to PC charger.