Why iPhone 6 screen no response when touch it? – Solution

If your iPhone 6 LCD screen has no response when you touch it, then you need to check iPhone touch IC. When you touch the iPhone display screen as usual, but the iPhone screen just stuck there, and it can't carry out your orders. Luckily, we have the best solution for it.

According to our repair experience, the iPhone no response when touching is caused by damaged iPhone white touch IC. Now,we need to check iPhone touch IC.

Disassemble the iPhone 6 and then remove the iPhone PCB board. Measure the working condition for iPhone black and white touch IC, and measure the 5.1V and 1.8V of the iPhone white touch IC, all the data tested is normal.

Remove the iPhone black and white touch IC, and then measure the diode data for the solder pad, it is normal.

Use digital multimeter to measure the data of iPhone 6 display socket synchronous signal, the data is about 400, which is normal.

Put it under the Stereo Zoom Microscope, and then replace the new U2403 touch synchronous tube, and then turn on iPhone test it, but the problem still there.

Remove the touch synchronous tube, and then measure the 6 pin ground resistance, about 700, it is normal data. When measure the first pin, we found an anomaly, the resistance value of this pin is infinitely large，while the normal data should be about 400.

Check iPhone schematic diagram through the WUXINJI Dongle, we know that this pin is connected with a test point PP2405, the data of PP2405 tested is 400, which is normal, so we decided use QUICK TR1300A hot air rework station to solder the jumper wire between PP24005 and the first pin on the synchronous tube,and then measure it again, the data tested is normal.

Install the iPhone and turn it on, when it get into IOS, touch the iPhone LCD screen, it has response now, and the touch screen works perfectly.