Ground Loop Humm/Buzz from Television

A TV can generate a LOT of electro-magnetic garbage that could be picked up by your other equipment. It may not be easy to do but putting some distance between the TV and the rest of your stuff, at least temporarily, would tell you. Good excuse to go out get a new plasma TV!

watch out some plasma screens cause all sorts of interference problems.. good luck with your cordless phone.

This may or may not help, but I'll relay a similar experience. I had a buzz when the tv was on, regardless of where it was plugged in and the grounding status of the tv (it is 12 yrs old and connected through coax cable tv, and located 0.3-4 m from my audio gear). After changing the location of my various audio components to different shelves, it vanished. I never did figure out whether it was the change in distance of one or more components from the tv or simply plugging and unplugging IC's that solved the problem. Possibly, removing the IC's may have abraded and/or "cleaned" them, or the amp or some other component was moved out of a critical EM field. This may be irrelevant to your case, but might be worth a try in case there is an EM field or RF that is the underlying cause.

You might try grounding the case of the satellite receiver to the electrical ground of the house. I used a wire with spades on both ends, and connected from the satellite receiver to the ground on the electical wall plate. I do not know if this will solve your problem, but it is an easy solution to try.

Jim T

Just a guess, but, maybe your properly grounded satellite is one ground too many. Forgive me if you already know this, but, you should have an odd number of ground connections. Perhaps a cheater plug on your satellite/cable box might be the trick. Good luck.