My roommate's computer is leaving us both stumped. He has a set of headphones (a $25 pair from Best Buy), and they have a mic attached to them. His case is a rosewill Destroyer case so it has a mic/headphone jack on the front panel, but his mic won't work no matter where it is connected. He can crank the mic level to 100 and he's lucky to get 2 bars on the sound test page. It's impossible to hear him from my end, what suggestions do you have to fix this?