iPhoneXS MAX speakers have no sound repair

Malfunction model: iPhone XS MAX
Fault: There is no sound from the bottom speaker.
A iPhone XS MAX fault machine, after changing the screen, went back to use for two days and suddenly found that the bottom speaker had no sound. After getting the machine startup test function, it was found that the fault was the same as the customer’s description, and the bottom speaker had no sound at all. Just disassemble the machine and have a look.

iPhoneXS MAX speakers have no sound repair Figure 1.

Dismantle the machine and observe it under the microscope to find a suspicious point, which is an Capacitor viewing point.

iPhoneXS MAX speakers have no sound repair Figure 2.

This should be an Capacitor with external boost. Make it up.

iPhoneXS MAX speakers have no sound repair Figure 3.

The test of replacing Capacitor with the power-on machine found that the bottom speaker was normal, which is a typical problem caused by replacing Accessories, so let’s leave the professional things to the professional people.