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DIY Fix iPhone X won't boot issue via repairing motherboard

The customer send us an iPhone X to repair, the fault described is that the iPhone is not turning on after dropping, and it reports error 56 after restoring.


The iPhone X is connected by 2 pieces motherboard via a middle column, so the pins are easy to lose because of dropping. Now, it's possibly the pin from the NFC chip to the iPhone CPU that was dropped off.

Disassemble the iPhone X, take out the iPhone motherboard. Use QUICK 861DW hot air rework station to separate the iPhone X motherboard, and then we saw that there are some pin was dropped off.


Check iPhone schematic diagram via WUXINJI Dongle, it's surrounded by ground lines, and the 6 useful pins was dropped off.

The ground lines are no need to fill, we just need to fill these 6 useful pins, we can check it under the Stereo Zoom Microscope. These all are the signal line of the NFC chip, so when we restore iPhone by iTunes, it reports unknown error 56.


Next we need to plant the tin in the middle column, and then re-weld the AP part.


Install the iPhone motherboard, assemble the iPhone, and then re-flash it again, now it flashes smoothly, all functions tested are normal, the repairs end!

This fault is because of the solder pins that from the signal of the NFC chip pass through the middle column to iPhone CPU was dropped off, and then it causes iTunes error 56 on iPhone. 


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