3gs screen won't turn on at all

hi everyone, so my iphone touch screen wasnt working unless i apply some pressure on the top of the screen, so i opened the iphone to see if there was any loose connections, there was a loose connection, when i was reassembling the phone the number 1 connector snapped out and the screen turned off, then i reconnected it and it worked again, then when i was reassembling it, it snapped out again, but this time i cldnt make it work again, i tried hard resetting and disconecting the board from the battery, but with no luck, it can connect to itunes i can hear sounds the vibrate button works, but it doesnt show as a camera on the computer, what shld i do plz help ty in advance :)