iPhone 8Plus has not been serving

Machine model: iPhone 8P

Malfunction: the mobile phone can be turned on after getting it, and all the cards are no serviecs and Fall hard, and the front screen and back cover burst.

Maintenance process:

And the GPS WiFi signal is also weak.earpiece has a very low voice. If you enter *#06#, you can’t test IMEI. It should be common failing, which is the diversity receiver.pad break off is the easiest to drop.
Dismantling found that not only pad break off, but also a corner of the motherboard was broken. According to the customer’s description, the back glass and screen Glass were also replaced before, and the tuner FPC inside was also broken, and the screw of ANT cover was also broken. A back cover assembly and dismantling screen were fixed for renovation.

iPhone 8Plus has not been serving Figure 1.

iPhone 8Plus has not been serving Figure 2.

At the beginning of maintenance, remove the two diversity receivers with pad break off. After scraping, repair the coils. Some points are just loosened and pried up. Fix Solder Mask.

iPhone 8Plus has not been serving Figure 3.

iPhone 8Plus has not been serving Figure 4.
pad break off, a small diversity receiver chip, was removed from Parts motherboard of 8. After installation test,no SIM was displayed, which was no longer no serviecs. There is also IMEI, and the plug-in card also has a signal. The broken corner should only be ANT, but it still needs to be made up.

iPhone 8Plus has not been serving Figure 5.
After the repair, small components such as Capacitor at the disconnection point were also repaired. It took a long time to repair the mobile phone.Jump wire was really not easy.Hand solder was too big. The middle Solder Mask was not firmly fixed and disconnected several times. Finally, it was repaired.

iPhone 8Plus has not been serving Figure 6.
Take the new back cover+screen to test that the WiFi signal is OK, and no serviecs has been solved. Now it’s up to earpiece.
According to the seller’s description,earpiece is tested well, and it is no accident that earpiece booster earpiece next to CPU is broken.

iPhone 8Plus has not been serving Figure 7.
Once again, when the wind speed is 450, the shielding cover tweezers are pried off, and the CPU sticks insulation tape and starts to dismantle Inductor. When the glue is removed,Inductor is loose. When the pin is pried off, it is found that both shielding cover 24301 are dropped and Inductor is broken.
Remove a perfect Inductor from Parts motherboard, patch it up for him, start the test again,earpiece OK, and put it back into shielding cover.