Solution for iphone 6S Motherboard Water Damaged - VIP Pro Shop Team

"My iPhone dropped into water and cannot be turned on. It was fixed in Repair Shop, but the problem remains the same. this may be the motherboard damaged by water, How to fix this issue",  Now, VIP Pro Shop Team will provide us with practical solutions.


Solution:

1. This iPhone 6S motherboard ’s large area is water damaged and water has been cleaned. There are bumps on the upper board of CPU. After measuring, we find that the power supply of upper board is not short circuit. Plug the adjustable power supply and the standby current is about 0.24A, as shown in picture 1-1.



2. After measuring, we find that the diode data of PP_VCC_MAIN is small, only several tens. The capacitor near Wi-Fi chip darkens badly. The location of darkened capacitor in bitmap is shown in picture 1-2 and its material object is shown in picture 1-3.

 picture 1-2

picture 1-3

3. Remove it and now the diode data of PP_VCC_MAIN is more than 100mA. As the water-damaged area is large, after observing carefully, we find that a capacitor at audio IC darkens badly too. Its location in bitmap is shown in picture 1-4 and its material object.


picture 1-4

4. Remove it and now the diode data of PP_VCC_MAIN is more than 300mA. Plug power supply and the standby current becomes more that 30mA. Each power supply circuit is not short circuit. We can feel that the upper part of the circuits is hot when plugging power supply. Thus, put rosin at upper part of the circuits and wait it melt slowly, finding that the rosin at circuits of display screen power melts faster than other parts. The location of display power chip in bitmap is shown in picture 1-5.




5. And its material object is shown in picture 1-6.


6. Remove display screen power chip and connect power supply. The standby current recovers to normal 0, as shown in picture 1-7.


7. Replace display screen power and the IC recover. IPhone can be turned on and can display.

Tips: If you want us to help, then feel free to Asking about VIP Pro Shop and we’ll back to you right away.


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