5 Easy Steps to Fix iPhone XS Unresponsive Touchscreen | Phonefix

  iPhone XS touch screen is unresponsive, even unable to unlock the phone, how else can we fix it? There may be several reasons for this problem. This article will fix a common iPhone problem - a frozen or unresponsive screen. If you have a similar problem, this article might help.

Step 1

  First of all, let's check the motherboard. The motherboard is not deformed or water damaged.

  Then we install the motherboard to test. Connect the display and battery. Turn on the phone. The touch screen is not working.

  Next, we measure the touch connector. Pin 21 of the connector is found to be open-circuited, which indicates that the circuit connected to pin 21 is faulty.

Step 2

  Open the bitmap. Pin 21 is connected to resistor R5842. R5842 is a safety resistor, so both ends are connected. We need to measure whether the resistor is damaged.

  Install the motherboard into the bracket. Remove the black adhesive by heating with a Hot Air Gun at 260 °C and airflow 2.

  Measure with a multimeter. Resistors were found to be good. It can be judged that the fault is not caused by the resistance. The fault should be in the middle layer circuit.

Step 3

  Then we detach the motherboard. Heat the motherboard on a Heating Platform at 160°C. After about a minute, use tweezers to remove the logic and signal boards. It can be seen that the motherboard has been separated before.

  Open the bitmap. The other end of the resistor is connected to the power IC through the middle layer. So we need to measure the circuit on the logic board first. The resistance value is normal.

  Then we measure the circuit between the signal board and the touch connector. The resistance value is 1.


Step 4

  The circuit is open-circuited. Then we repair by jumping wire. Apply some Paste Flux to the resistor. Solder the copper wire to the resistor with Soldering Iron at 360 °C.

  Because the two ends are too far apart, we need to fix the copper wire in the first place. Apply some Solder Mask. Solidify with UV Curing Lamp. Check if the solder mask is solidified with tweezers. Next, fix the remaining copper wire with Solder Mask.

  Cut the copper wire. Solder one end of the copper wire to the signal board. Measure with the multimeter. The value of resistance is 0, which indicates that the circuit between the touch connector and signal board is connected. Solidify pads on the signal board with Solder Mask. Scrape to show the pads. Clean the bonding pads with PCB Cleaner.

Step 5

  Then we recombine the signal board with the logic board in a direct way. Put the signal board on the 160 °C Heating Platform to heat. Apply some Paste Flux to the bonding pad. Put the logic board in position. Press gently with tweezers during heating. After about a minute, remove the motherboard.

  Measure pin 21 of the connector after the motherboard has cooled. The value of resistance returns to normal. Install the motherboard to test. The touch screen works well.


  The above is the repair method for the iPhone XS screen not working. If you have any questions or have a better repair solution, please comment us below. Phonefix is happy to serve you.

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