Problem with my entryx em855 mp4 player
 

i have flashed my entryx em855 player with em850 firmware to change the menu look , but after that , the payer turn on only when i plug the usb in and the keys don't work , and i can't get to flash mode , because i need to press play key when i plug in the usb , i tried to get the player in ADFU mode and after i maked the conection of the pins , the player was dead , it don't turn on when i plug the usb or charger , i tried to press any key , but nothing . What can i do?
Sorry for my english.