How to Fix iPhone XS Touch Function Doesn’t Working

The problem that iPhone touch function is not available is one of the most common failures. According to the description of iPhone users, the touch screen function of iPhone XS fails during normal use. After restarting the phone, the touch function and Touch ID function did not respond at all. The fault may be caused by software problems or hardware problems. In this article, we want to fix the touch function of the iPhone XS.

First of all, connect the iPhone XS to the computer by iPhone Charger Cable, and then use iTunes to restore the iPhone XS. After restoring, test the iPhone XS, unfortunately, the iPhone XS touch function is still not working.

How to Fix iPhone XS Touch Function Doesn’t Working
Next, we're going to fix it by replacing the new iPhone XS screen. Use screwdriver to remove the screws at the bottom of the iPhone screen, and then put iPhone XS on the CPB screen separator for heating, after a while, use LCD sucker to open the iPhone screen. Remove the iPhone screen, install a new screen, and then test it, but the iPhone XS touch function is still not working, which means it's not the problem of the iPhone screen.

Now we need to check iPhone motherboard. Disassemble the iPhone XS, remove the iPhone XS screen. Use Fluke 17B+ Multimeter to measure the resistance value of the iPhone motherboard touch connector, when measured the 28 Pin, the value is 0, which is abnormal.

How to Fix iPhone XS Touch Function Doesn’t Working
Log in to the ZXW online account to check iPhone schematic diagram, we know that the 28 Pin is PP5V25_Touch_VDDH, 5.25V is power supply for touch screen. According to the iPhone schematic diagram, it's output by the iPhone touch screen IC U5600, which has 3 filter capacitors in the circuit.

Use PHONEFIX 939 Rework Station to remove these 3 filter capacitors, and then use digital multimeter to measure the 28 Pin again, now the resistance value is normal.

How to Fix iPhone XS Touch Function Doesn’t Working
Assemble the iPhone XS, turn it on, and then test the iPhone XS screen touch function, now the iPhone XS touch function is working perfectly, the iPhone XS touch failure has been solved.

Hope that by reading this article, your Touch function unavailability problem has now been resolved. If not, we suggest you need to the nearby Apple Store to get professional repairs. If you have any other questions, please leave a message in the comment.

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