Microphone won't pick up any sound. Can anyone help?

I have changed my USB connector twice, a printcard where the microphone also is placed. At first, it had problems charging, but when I changed the first time to a new printcard the microphone was not picking up any sound. I thought that it had something to do with this product-batch and ordered a new one from another supplier. So when I changed to this one I still have the same problem. The card itself is different in colour and a few design-alterations in the matter of the other supplier. So I assume it is not produced at the same factory. I think it is quite weird that they have the exact same problem, so maybe it's a problem with the flex-connector? Or do I have to do any re-calibration of sound or something similar? Anyway, does anyone know about this?

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Just wondering. Nobody can hear you on a call, is this correct? Have you tried using the earphones with the microphone attached to verify that the voice transmission circuitry is OK? If they can hear you then it is as you say there is a problem with the microphone, if they still can't hear you the problem is most probably with the systemboard.

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