iPhone 12 Pro Max Touch Not Working Repair Guide

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When dealing with an iPhone 12 Pro Max unresponsive touchscreen, the usual fix involves replacing the screen, which can be quite costly. However, in this article, we will present an alternative method to resolve the problem without having to replace the entire iPhone screen assembly for iPhone 12 Pro Max touch-related issues.

Steps to Fix iPhone 12 Pro Max Touch Not Working:

  1. Disconnect Flex Cable and Remove Screen: To prevent damage from Electrostatic Discharge (ESD), carefully remove the flex cable using a plastic spudger.

  2. Separate the Glass: Begin by setting the separator temperature to 100℃. Once the desired temperature is reached, place the screen on the iPhone screen separator to detach the earpiece speaker module.

  3. Clean OCA Adhesive: Utilize specialized OCA removing tape on the OLED screen, then apply heat to ensure the tape adheres tightly to the OCA for removal.

  4. Apply OCA on Touch Screen Digitizer: Attach the OCA to the back of the touch screen digitizer, and place it into the bubble removing machine.

  5. Touch Screen Lamination: Clean the OLED before aligning the glass with it using an aligning mold. Then, laminate the screen and debubble it properly.

  6. Transplant IC to Tag-On Touch Flex Cable: Apply high-temperature tape around the IC for protection. Desolder and clean the IC for smooth operation.

  7. Install Screen Tag-On Flex Cable: Align and solder the flex cable ensuring proper connection for touch functionality.

  8. Install Bezel Frame: Apply bezel adhesive, align it with the display, and install the screen assembly securely.

  9. Test Functionality: Verify that the touch is fully operational, and features like True Tone are functioning correctly.

For individuals encountering touch issues with their iPhone 12 Pro Max, it's recommended to consult a qualified technician for assistance. Attempting complex repairs without expertise may lead to further complications.

If the touch issue is caused by iPhone motherboard problems, seek professional guidance for resolution.

In conclusion, while repairing touchscreen issues on an iPhone 12 Pro Max can be challenging due to its integrated structure, following detailed repair procedures with caution and precision can help restore functionality. 

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