Not long back my steel series 7xb wireless headset was having an issue. The left earmuff was recieving no sound whatsover. My roommate has been trying to trouble shoot it but are failing. Any idea? Not sure if anyone has had this issue before. Note: The right earmuff has power. I get noise to come through the right earmuff. The left side has the retractable mic on it. I tested that side and I am still able to send messages through the microphone. Just no sound comming through.