Are the TV and amp on the same circuit? Do you have any sort of surge protection? If so, does it islotate each component from another?
Yes, yes, and yes.
Try running an extension cord from the wall plug of another circuit and see if the noise stops. It sounds kind of like the TV is putting noise on the circuit.
I did this on advice of Outlaw tech support, and it does reduce the effect significantly, although it does not eliminate it entirely. The tech's opinion was that the buzz is a consequence of voltage sag on the line, which is plausible, as the TV can draw widely varying, and sometimes very high, currents. I doubt it's noise feeding back through the AC line, as then I would expect it to find it's way through via other components, which doesn't seem to be happening.
Previous Topic
Index
