The iPhone 8 Plus was damaged by liquid, in resulting the iPhone can't be charged, but other functions are working fine. Because there is liquid damaged, so we suspect the iPhone 8 Plus has hardware failure. Here we can get fixed details!
Firstly, disassemble the iPhone 8 Plus. Use phone opening tools to disassemble the iPhone 8P, remove the iPhone display assembly, disconnect the iPhone battery, and then take off the iPhone motherboard.
Secondly, measure the iPhone charge current. Connect iPhone to the DC power supply, there is no charge current, so the iPhone 8P won't charge, the main reason should be in the iPhone motherboard.
Thirdly, check iPhone motherboard. The motherboard obviously has traces of water. Clean up the iPhone board, and then put iPhone motherboard under the microscope to check, we found the capacitors near the iPhone WIFI IC have been severely corroded.
Remove the corroded capacitors, and then turn it on to test, now the current jumps from 200mA. According to the faulty phenomenon and our repair experience, the iPhone 8P won't charge but leakage, possibly it's caused by damaged iPhone USB charge IC.
Remove the iPhone USB charge IC, and then measure it again with DC power supply, but the failure stills the same.
Measure the resistance value of iPhone tail plug flex cable by digital multimeter, we found the first pin PP3V0_LAT_CONN of the iPhone tail plug flex cable is grounding short-circuit.
According to the iPhone schematic diagram, we know this circuit power supply is PP3V0S2 output from iPhone power, it passes through FL6430, final to iPhone tail plug interface. So, it's the problem of the iPhone power supply. Check iPhone bitmap, we found the corroded capacitors are output from iPhone power.
Use tweezers to remove it directly, and then measure the current again, now the current measured by dc power supply is normal.
Finally, install the iPhone 8 Plus and test it, now the iPhone 8 Plus can be charged properly. Access to the IOS system to test other functions, all works fine!
Firstly, disassemble the iPhone 8 Plus. Use phone opening tools to disassemble the iPhone 8P, remove the iPhone display assembly, disconnect the iPhone battery, and then take off the iPhone motherboard.
Secondly, measure the iPhone charge current. Connect iPhone to the DC power supply, there is no charge current, so the iPhone 8P won't charge, the main reason should be in the iPhone motherboard.
Thirdly, check iPhone motherboard. The motherboard obviously has traces of water. Clean up the iPhone board, and then put iPhone motherboard under the microscope to check, we found the capacitors near the iPhone WIFI IC have been severely corroded.
Remove the corroded capacitors, and then turn it on to test, now the current jumps from 200mA. According to the faulty phenomenon and our repair experience, the iPhone 8P won't charge but leakage, possibly it's caused by damaged iPhone USB charge IC.
Remove the iPhone USB charge IC, and then measure it again with DC power supply, but the failure stills the same.
Measure the resistance value of iPhone tail plug flex cable by digital multimeter, we found the first pin PP3V0_LAT_CONN of the iPhone tail plug flex cable is grounding short-circuit.
According to the iPhone schematic diagram, we know this circuit power supply is PP3V0S2 output from iPhone power, it passes through FL6430, final to iPhone tail plug interface. So, it's the problem of the iPhone power supply. Check iPhone bitmap, we found the corroded capacitors are output from iPhone power.
Use tweezers to remove it directly, and then measure the current again, now the current measured by dc power supply is normal.
Finally, install the iPhone 8 Plus and test it, now the iPhone 8 Plus can be charged properly. Access to the IOS system to test other functions, all works fine!
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