Free Guide: How To Fix iPhone 6 Plus No touch disease

We received a damaged iPhone 6 from our customer, the problem is iPhone 6 plus touch screen doesn't respond. In a word, iPhone 6 Plus touch function not working. Actually, iPhone "touch disease" is a common issue for Apple users. Now, we will share an professional solution to fix iPhone 6 Plus no touch issue.



1. Disassemble the iPhone by JM-9102 Disassemble Tool; take out the iPhone motherboard to check A8 CPU. It's easy to determine if the CPU has a problem. Install the iPhone LCD screen to test the iPhone white touch IC power supply 1.8V and 5.1V, if all is fine, that means the CPU is fine.

Touch Logic Working time: After the CPU provides communication to the white touch signal line, the power supply IC provides 1.8V power supply to the white touch, display IC provides 5.1V power supply to the white touch. The power supply for both lines is normal, which means the iPhone has no touch disease is not caused by a CPU circuit.

2. Continue to check the iPhone motherboard, we found 6-pin sync tubes missing, and one pin was gone. Short connect this sync tubes with jump wire. Use the QUICK 861DW soldering station to make the jump wire from black touch IC M1 pin to sync tubes, then install the iPhone and test it. However, the problem still exists. What's going on? Keep checking.

3. During the iPhone boot process, we found the iPhone display color will be distorted and the color will fade. According to experience, this situation should be caused by black touch IC negative pressure work abnormal. Use multimeter to measure the black touch IC +-5.7V, it is normal. Then we measure the black touch -12V C2438, its power is pulled down into -5.3V, looks like the problem is on this circuit. Only capacitor C2438 and black touch on this circuit, the black touch IC has been replaced; now we replace the C2438. Then measure it, and the negative pressure 12V is normal. However, after testing, the iPhone still no touch. Keep checking.

4. After testing, we found there is a disconnection between the sync signal and the test point. Directly weld the jump wire from sync signal to test point. Now, assemble the iPhone and test it again, the iPhone display screen can be touch now, and it response perfectly.


Tips: If you need more professional repair skilled, you want to consult, please check Here. We'll give you a free answer.

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