Just bumping up this thread to see if anyone has an answer.
The analog audio(back panel) is greyed out in the realtek hd audio manager. The audio can't be heard if the speakers are in the light green socket in the back. The speakers only play when they are in the black socket(digital audio) but very, very low. The audio is coming from the front panel, I think.
The front panel in the realtek hd audio manager has both the headphones and the mic lighted up.