Answer to "Touch screen problems after screen replacement"I'm not a repairman either but i have been playing around with the different types of iphones & androids. i had this problem just now with my sons iphone 5c and i tried a few different things. the last thing i did was open it back up for the last time & i noticed that the little chrome tip on the front camera cover was setting on top of flex cable instead of up under it. so i took the 2 screws off this cover & made sure chrome tip was under flex cable instead of on top & i also made sure the black film on top of the vibrator was covering the home chrome of the vibrator when i put screen back together & everything works fine now & screenis fully functional & no lines in it. i hope this helps some1 else.