I have read many posts & am more confused. i Have model SGH i 727. some posts say its a loose connection & open back w/ phillips to fix. I luckily backed up all my info. I replaced battery with exact same 1, no luck. I have 2 GSII & made sure it wasn't the power cord. I have called Samsung cust service (not sure what country answers) 5x. Anyone have any constructive advice?