Hi David,
First, welcome to BeoWorld!
I have to say that I've never heard of that particular faultt in the AV-7000, but since we have two other folks testifying, I'd say that comprises a trend. I don't know where you are in Maryland, but the regional service center is in Rockvile, and they do very good work...so if it gets beyond the DIY stage, you will have a good 'plan B'.
Any help I can provide, let me know.
We kid because we love.
Bang & Olufsen Tysons Galleria
McLean, VA USA