Audio from only one speaker of my HT820 Blu...

I bought this item used and have had no luck getting audio to play through both speakers. I had no problem pairing the headset with my Motorola Rizr Z3, which I understand supports the A2DP profile. One thing I've noticed is that I can only pair the HT820 as a headset -- there is no option for a stereo connection. Still, I get high quality audio from the right speaker and nothing from the left. Same drill with my laptop running Vista + Widcomm drivers -- high quality from the right, silence from the left. Am I dealing with a bad speaker here?