Solved: iPhone 6S Plus display screen failure (no touch no display)

As we know, iPhone touch disease is a common issue, here is a case. When turn on iPhone 6S Plus, the iPhone display is dark, when touch it, it has no response, we need to solve it.

Check iPhone 6S Plus schematic diagram on WUXINJI Dongle, we know that the power supply of the display and touch screen is supplied by U4000 and power C--U2000. The power IC provides a 1.8V power supply, and U4000 provides 5.7V to 5.1V voltage.

According to our experience, the inductor FL4200 FL4205 FL4207 FL4208 FL4209 FL4210 is easy to corrode, resulting in no indication, no touch. If you encounter the same condition, you can solve it by short connecting.

For iPhone no display no backlight issue:

first you need to do is to install the iPhone 6s plus screen,and then use Fluke 15B+ digital multimeter to measure the IC output voltage 5.7V whether it is exist.

If there is no 5.7V , it means that the display screen power supply IC--U4000 is damaged, the solution is to to replace a new U4000.

If there is 5.7V, you need to check the short inductance FL4200 FL4205 FL4207. If there is touch failure condition, check and short connect FL4208 FL4209 FL4210.

After finished the repairs, you can install the iPhone, and test it, now the iPhone display screen works properly, the touch function and display function is normal.