I've had a Lenovo ThinkCentre A60 headset for about 2 years now and recently, the foam ear comforters on the speakers got ripped apart by a certain cat... So, I took the ear rings from another headset. They're not exactly shaped ideally for putting on the headset. The rings are oval-shaped, but the speakers on the the headset are circular. I put them on, and it worked fine for about an hour, before the right speaker (the one closest to the microphone) stopped working entirely. What could have happened? How do I fix it?