first have your battery checked by charging your battery in your friends same model phone. If the battery gives u it is good, then collect the required files of your phone model to flash which is available in to sony download area, I dont have acess to download area and top sony strictly restricts file sharing, just read the rules. try getting xss++ 3.0 in se-nse sites, but remember if there is corrupt gdfs u need to have multiserver cable to unlock. Important, before flashing, have ur battery fully charged. Read tutorials from topsony relating how to flash. After flashing main file in xss++, check if there is light in screen by booting phone, or in infrared ligt is blinking to know your phone hardware status. If u find this post helpful please don't forget to press thanks button. Good luck