We've had our LV12R for about 7 months now and it started picking up some kind of feedback recently. It has some kind of crackle, buzzing, hum thing going on in the background. I really don't know where to start troubleshooting or how this may have started. It's really distracting once I started hearing it.

Any thoughts on what this could be? I tried turning it off, unplugging, and using a different outlet/power strip. No improvement.

Thank you!