How to get rid of groud loop noise from dish ?

Line level isolation transformers can be found economically at most car audio shops; they have RCA in's & out's. These will isolate the audio shield connections from the hyper-ground noise which you're experiencing.
Sometimes though, all you have to do to fix this is to ground the coax's shield to your household ground. Use a length of stranded #20 awg wire, strip off some insulation & attach one end to a household outlet's cover-mounting screw, then strip & wrap the other end around the coax connector's shield, securing it with a small cable tie. This brings the coax';s ground potential equal to your household ground, which completely solved the problem for me. I still use the audio coupling transformers as extra insurance, though it may not actually be necessary.

Just wondering if it is a bad idea to common up the grounds. Would this not put a bit of noise onto your audio component's ground? If so, this would not be good for your noise floor.

There is also a small coax device designed to get the hum out. Mondail makes one, it's called the Magic Box. I believe Audio Advisor and Audio Outlet both sell it.

Simple: attach one end of a wire (maybe with an alligator clip) to the outside sleeve of the satellite TV coax cable (where it enters the receiver) and ground the other end. You can also buy a Radio Shack ground block for cable TV that has a little screw for connecting such a wire. don't spend more than $5 on this problem.

I have EXACTLY the same problem with my TV and Sony DVP9000ES. I need to read this in more detail - at least you know you're not the only one, pal :)

I'll be damned! Pal Do what Bob Bundus said. It's cheap and fast and WORKS!
I also had this horizonal line floating on the TV thing, too and THEY BOTH ARE FIXED NOW!
Believe Bob when he says use a cable tie. The connection on the coax needs to be tight for it to really work. To test it, push hard and you'll see it goes away. I had to take the cover plate off to get a good fit on house ground, for now.
THANKS, my Friend! U DA MAN!

Angela