How to fix iPhone 6 Plus the white stripes and unresponsive touchscreen

A dropped iPhone 6 Plus,When I booted it up, a lot of vertical white lines appeared and the touch screen became unresponsive

IPhone 6 Plus touch screen sometimes responds while sometimes not. And the white stripes appear on screen. This kind of problem is common in iPhone 6 Plus. The dropped iPhone 6 Plus is very likely to have such problems, as shown in picture 3–31.

The reason is that the pin M1 of touch process chip U2402 almost disconnects. The pin M1 is used by synchronizing signal to communicate between LCD and touch process chip. If the synchronizing signal does not synchronize normally, the touch screen will not respond. Remove the touch process chip directly, finding pin M1 has been taken down along with the touch process chip, as shown in picture 3–32.

After knowing the problem, it is much easy to repair. Solder a wire at the original joint of pin M1, as shown in picture 3–33.

After the wire is done, solder the touch process chip U2402. Turn on iPhone and get into test on IOS. The touch screen can respond now. Trouble is removed.