Main and Sub Mic Problem and OS Crash [Redmi Note 9 Pro] [MIUI]


May 25, 2023
Recently got a Note 9 Pro with a dead microphone making scratch sounds only.
So I just opened it and did replace the charging port, where the mic is located, by a new one.

Sadly, it's still not working so I did test both mic in the FQC Test (by tapping the Kernel Version multiple times) and both mic dont work (values are -1dB then stuck at 38dB).

Important note is that it is also crashing my phone OS when I test it, same with the recording app for testing.

I'm not sure but could it be some software issues instead of hardware?