I need help! I disasambled an Iphone 3g 8gb black piece by piece,I asemblet it back but now the lcd is not turning up.I don`t think its the flex because on another iphone it works.The phone itself works because i can turn on/off sound and it vibrates...PLEASE HELP ME Could it be the 3rd connector? does it have any role with the lcd? or just sensor and earpiece?