My internal microphone is not working. It picks up sound only when i flick the outer microphone location. When I plug a headphone with a microphone, there is no problem.
I took it to the genius bar and they seemed to think it was hardware related. They quoted me 500 CAD to replace the top case. This was not acceptable.
I think it is not a software problem. But, I cannot be sure. I think the connection between the logic board and dual microphone might be hindered.
I'm using the beta version of OS X yosemite, I wonder if reinstalling the os might fix the problem?
Is there any trouble shooting advice?