Post originale di: Alexander ,
When mounting/unmounting the screen it should NEVER be held at a 90degree angle to the chassi. Most likely you are bending the cables during instalation, they are very sensitive. I had this issue when I first started repairing Iphones until I learned this. Keep the screen at an angle, even if it is difficult to screw the ESD protection in place over the screen afterwards, you avoid damaging the flex cables.