Iphone 3 G no charge no usb solution

1- clean i/o connector flex and pcb connector

2- replace i/o connector flex and pcb connector
3- replace 1 or 2 transistor under shield (check oxy), if no transistor available make jumper.
phone charge @ 290mA , stop charge after 5h, dont get hot and stby time is right.
probably transistor cut power when too hot or someting like.
if solved press thank!!





Find under the shield but at the back of main board right side at the bottom