Our customer accidentally dropped his iPhone X, and although he immediately picked it up, the iPhone still couldn't boot. And error 56 is reported after recovery. How to fix this iPhoneX? Please read the following repair steps.

The iPhone X is connected through the middle column through two motherboards, so the pins are easily lost. Now, it is possible that the pins of the NFC chip are dropped onto the iPhone CPU.

The iPhone schematic was checked by WUXINJI Dongle, which was surrounded by the ground and dropped 6 useful pins.

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 NFC chip pass through the middle column to https://www.vipprogrammer.com/iphone-5s-6-6s-7-motherboard-baseband-cpu-a8-a9-a10-a11-u0201-chip-programmer-3255was dropped off, and then it causes iTunes error 56 on iPhone.