iPhone 6S failed repair

Machine model: iPhone 6s
Malfunction: the machine fell, and it didn’t respond when it was turned on.
The machine has fallen, sometimes it can be connected, and sometimes it can’t.

iPhone 6S failed repair Figure 1.

Maintenance process:
The connection machine is not normal and the driver display is incorrect. This phenomenon is usually CPU Inveracious Soldering. The machine that has been dropped is CPU Inveracious Soldering. When the CPU is finished, it can be connected normally. Update System reported an error of 4013.

iPhone 6S failed repair Figure 2.

As soon as the progress bar appeared, it reported an error of 4013.

iPhone 6S failed repair Figure 3.

iPhone 6S failed repair Figure 4.

iPhone s’ machine reported an error of 4013 as soon as it came out of the progress bar. Generally, it was Baseband. When Baseband was removed,Baseband was found.

iPhone 6S failed repair Figure 5.

iPhone 6S failed repair Figure 6.

Fix the broken wires with pin, and install the chip. It is still Update System reporting error 4013 and Update System repeatedly testing. When Hang Logo(white apple)was found, S3,S4,S5 VCC of Baseband instantly detected VCC, but S2 didn’t, and the ground diode value of S2 was hit. Is Baseband VCC broken? Remove the Baseband VCC chip and measure its pin bit by the way. It is found that 91 pin and 97 pin of the Baseband VCC chip are not working.Here’s the problem. Remove Inductor. It’s Inductor pin. One Inductor is dropped from the back.

iPhone 6S failed repair Figure 7.

iPhone 6S failed repair Figure 8.

iPhone 6S failed repair Figure 9.

iPhone 6S failed repair Figure 10.

iPhone 6S failed repair Figure 11.

After replacement, put it back into the original fingerprint Update System progress bar, and brush it normally. At this point,iPhone TC 1501 failed to repair the fault.