How To Fix iPhone 6 Plus "Touch Disease" More and more people have the issue that is iPhone 6 and iPhone 6 Plus touch freezing up and becoming unresponsive. The issue even has a deadly sounding name "Touch Disease". Apple said that some iPhone 6 Plus
devices
may
exhibit
display
flickering
or
Multi-Touch issues after being dropped multiple times on a hard surface and then incurring further stress on the device. Now Vip Fix Shop Team gives you a solution about this issue. Hoping your iPhone 6 plus can benefit from it.
The iPhone 6 Plus that has been sent, customer description says, it suddenly no touch during the normal
use and this iPhone hasn't been repaired before. So we know the reason, then we start to fix.
1. We first thought it is caused by iPhone black touch IC M1 pin disconnection. Remove the black touch IC, we found that there were no signs of M1 pin was empty solder or disconnection. Anyway, now the chip has been removed, so we measure the diode data of it with multimeter. Measuring the diode data of several important pins which on black IC solder pad, all is normal. Picture 1-1
2. Then we scrap the M1 pin, and solder a jump wire on it with phone soldering station, now we put back the black touch IC, power on it, and test it, the failure still exists. Now we can rule out this reason. Measuring the working conditions of white touch IC, we found the diode data of white touch IC 5.1V power supply Filter Capacitor only about 70,so we suspect this could be caused by a short circuit inside the touch IC.
3. Remove the touch IC and measure the diode data of 5.1V, it still only about 70, we didn't find the real problem yet. 5.1V in addition to the touch IC and display power IC peripheral circuit, only two of the filter capacitor, so we just pry the two capacitors out. After pry out the capacitors, measure it again, the diode data recovered to over 500, looks like the capacitor is short circuit. We can check it under the microscope, as shown in picture 1-2
4. Find an iPhone junk motherboard, and then fill back the capacitor. Assemble the touch IC, supply power on it, then test it, now it can be touch, the problem is solved.