- if you have more than two speakers connected, you can't have a mic connected to the front port connection and have it work - when you have more than just a pair of speakers connected, you lose the ability to use a mic's input, because the sound's circuits uses for ports have been logically re-mapped to accomodate you using more than two speakers. Connecting a mike to the header won't work in that case.
- that a mic's volume is MUTED in Windows in the sound mixer settings by default (RIGHT click on the speaker icon in your taskbar, select Open Volume Control). When you use a program that a mic can be used in, that's supposed to be and usually is automatically un-muted. You must use a program a MIC is required for.
If you don't see the mic settings in the mixer settings, click on Properties at top left in the mixer settings to insert a checkmark in the box beside mic
- every soundchipset works best with a mic that has a specific impedence - if the impedence of the mic you're using is not ideal you may have to turn up the mic volume a lot, or sometimes there is a mic boost feature you can choose in the sound mixer's setiings somewhere.
Manual for your model, page 34 of the pdf
On the one end of the header, MIC2, AGND in the other row beside it.
That's probably all you need to connect.
MIC2 to MIC IN, AGND to AGND.
(if you want to connect to a headphones case port, you have to remove the two jumpers on the header if they are there and connect wires to those pins the jumpers were on).
You do not connect to the one for +5v unless the mic requires power -in most situations it doesn't unless you have a special more expensive mic, and in any case from what you're saying your case doesn't have the wire for that.
The MIC connection for a sound codec chip on that header is often mono rather than stereo.
You could try connecting MICPWR to MICPWR but it probably won't yield you stereo input.
The sound chip is the ADI AD1888 6 channel (5.1) codec (uses SoundMax software).
You have only three sound ports.
The uses for them are Line out , Line in and Mic, but that's ONLY if you connect just a pair of amplified speakers to Line out (the green port).
If the proper software for it is installed, there should be an icon for it in Control Panel where you set the uses for it's ports, and/or a listing for it in your programs list, and/or when you plug into other than the green port on the back of the case, that utility may pop up and ask what are you connecting.