Malfunction Phenomenon
Press the power button to power on the phone, apple logo appears on the screen when keeps restarting. Then connect it with the computer and restore the system via iTunes, but error code 56 appears during the restoring system process.
For iPhone X Error Code 56 Issue, there’s a high chance it’s caused by the poor soldering of the upper and lower layers causes the NFC-relevant circuit doesn’t work properly.
Take out the motherboard and detach the two layers of the motherboards from each other. And there are some pads missing after we separate the middle frame. Then find out the pins of useful signal in the middle frame from the bitmap and apply the jumping wire method to fix the missing bonding pads.
After fixing the missing pads, then make the upper layer and lower layer solder together.
Connect it with the computer and restore the system via iTunes, the phone can be restored normally, problem resolved.
iPhone X Motherboard Repair Case