Only one microphone on my phone is functioning properly (HTC One M8)

A

AC Question

Hello
So recently, I had issues with my HTC One M8's LCD, and I took it to a local repair shop to have it fixed. It was fixed with no issues and all was fine, But now, I have discovered that the first microphone on my phone (I determined this via the *#*#3424#*#* menu) is not working and is creating a buzz constantly, but the second microphone is functioning properly.

Is there any way I can exclusively use the second microphone or is there anything else I can do?
I can't send it to HTC/o2 as it was repaired by a third party business

Any help or workarounds would be greatly appreciated