How to Solve iPhone 6 Cannot Boot while Charging Issue This article is about iPhone 6 can’t boot when charging, if you have this situation, you can follow these. Some phone repair guides and tools, you can find at Vip Fix Shop Team.
Fault description: We find current 80mA circularly run while connecting and triggering with multimeter, so maybe it's USB damgage cause I2C short circuit during charging process, first remove the iPhone 6 motherboard and take the USB off, but it's still the same as before, then we measure the I2C resistance and power supply! It is found that the I2C 0SCL is in a short circuit state. As shown in picture
11-10-1.
Since it's short circuit, it means the connected chip is damaged, the connected chips have display, backlight, main power supply USB and the iPhone 6 CPU.
First observe with microscope, it is found that all the backlight diodes are burning and discoloring. Then remove the backlight first, it does not short-circuit. The trigger current is normal, so continue to replace the 3 piece of iPhone backlight chips.
According to our past experience, if the large inductors gets discoloring, the large inductors with connected backlight would also have problems, so we replace them together. As shown in picture 11-10-2.
After the replacement, the current is triggered normally, Install the USB to turn on the iPhone 6, the functions are all tested normally. As shown in picture 11-10-3.