Windows will happily output sound to my headset but there is no input from the mic. I have a xonar dg as my soundcard.
The headset mic has been tested on a laptop and works
The microphone mute button the the headset cable is set correctly
The jack is correctly in
On plugging in (and fiddling with the jack) the mic I can see noise in CP/Sound window
It has been tested on the front panel, the soundcard jack & motherboard jacks
Drivers have been wiped and reinstalled
System restores had no effect
A reinstallation of windows keeping programs & settings had no effect
The mic is not muted or set too low in Control Panel / Sound
The mic in my webcam works correctly (USB)
Connections inside the case are not loose
Toggling the front mic option in Cp/Sound/Recording/(the mic)/properties/custom has no effect
I also managed to get the mic to work (badly) for a few seconds after windows reinstalled. After I plugged in the headphone jack, the mic went dead and hasn't recovered since.
The mic has worked on this PC before, it seems some setting / software / driver is mucking up.