iPhone X can’t activate repair

iPhone X can’t activate repair

Malfunction model: iPhone X 64G
Malfunction phenomenon:mobileI have dropped and replaced the screen and back case of the mobile phone before, and then the mobile phone has been used without any problem, but it can’t be activated after being updated and restored once recently.
Fault analysis: In this case, it is possible that there is something wrong with Baseband or nfc circuit of the mobile phone, because Baseband is unlikely because it has been used normally before the customer described it, or the suspect is placed in the nfc circuit position.
Maintenance process: first disassemble the machine, take out the main board to observe that there is nothing abnormal in appearance, and directly check whether there is separate in the middle layer.

iPhone X can’t activate repair Figure 1.

Many points can be seen in the figure. When you open Xinzhizao Soft drawing, you can see all the points related to NFC circuit. Now, it can be basically concluded that the middle pad break off can’t be activated, so it can be directly replenished.

iPhone X can’t activate repair Figure 2.

After patching, go directly to REBALLING welding for installation test.
Maintenance result: After welding, all functions such as touching WiFi Baseband are normal, and the activation is normal, so the maintenance ends here.