I had a major ground loop with my M80 through my power amp.
Have a monster power with ground loop isolator hooked my cable coaxial through the circuit and totally gone. when the coaxial comes loose ground loop returns tighten and good to go.
I'm certain the Axiom quality and performance would kill my monster power centers loop isolator.
Hopefully it's something as easy, try contacting your cable provider they may be able to help, though here in Vancouver when I called to ask Shaw for help they claimed they didn't know what I was talking about.
{DUH what's a ground loop}and that was when I added my HD cable box. You kind of have to let them know you know more of these tech issues than they do!!!
