iPhone Touchscreen Not Working
iPhone Touchscreen Not Working Using precision screwdriver, carefully remove all the screws from the housing of the iPhone and keep them at a safe place.
Remove all the screws from inside and carefully disassemble all the inside parts until you reach the Logic Board of the iPhone. Remember the sequence of disassembly that will be helpful when you assemble back the iPhone.
When you look at the Logic Board of the iPhone, you will see an IC similar to the image below. Remember, different models of the iPhone will have different part numbers on the Touchscreen Controller IC. For e.g., the Part Number of iPhone 4S Touchscreen Controller IC is – TI 343S0538.
Dry solder could be one reason for the touchscreen problem. Using ESD-Safe Brush, apply good quality no-clean flux on all sides of this particular IC.
Using Hot Air Blower, give hot air all around the IC. Make sure to give hot air from some height. If you give hot air from too close then the solder can melt. Our motive is to not to melt the solder but to remove all the oxides from the solder joints.
Now using any good PCB cleaning chemical like IPA solution, clean the logic board with the help of ESD-Safe Brush.
Assemble back the iPhone and check the touchscreen. It should work now.
If the problem is not solved then you may have to replace the Touchscreen Controller IC (SMD).
iPhone Touchscreen Not Working Using precision screwdriver, carefully remove all the screws from the housing of the iPhone and keep them at a safe place.
Remove all the screws from inside and carefully disassemble all the inside parts until you reach the Logic Board of the iPhone. Remember the sequence of disassembly that will be helpful when you assemble back the iPhone.
When you look at the Logic Board of the iPhone, you will see an IC similar to the image below. Remember, different models of the iPhone will have different part numbers on the Touchscreen Controller IC. For e.g., the Part Number of iPhone 4S Touchscreen Controller IC is – TI 343S0538.
Dry solder could be one reason for the touchscreen problem. Using ESD-Safe Brush, apply good quality no-clean flux on all sides of this particular IC.
Using Hot Air Blower, give hot air all around the IC. Make sure to give hot air from some height. If you give hot air from too close then the solder can melt. Our motive is to not to melt the solder but to remove all the oxides from the solder joints.
Now using any good PCB cleaning chemical like IPA solution, clean the logic board with the help of ESD-Safe Brush.
Assemble back the iPhone and check the touchscreen. It should work now.
If the problem is not solved then you may have to replace the Touchscreen Controller IC (SMD).
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