Hi. Just a question about one of my ElectroMotion ESL. What is happening is I am getting random tick and popping sounds when the power is applied, and there is no input signal. It does not happen all the time, and is random. The sound goes away eventually after the power is turned off on power bar, and even swapped out powerbar. Tried swap the supply on the other side, same issue. I guess it started about a year after bought them in 2013. When I was at the Audio Show in Toronto last fall, the rep from M/L said it might be dust. I did use a Swiffer duster to clean the panel on both sides, but still makes the random noise. I suspect it might be the X-over/amp or cold solder or bad capacitor. Anyone else have this? I have the email address for service if need to send out for repair. Thanks.