How to clean up sorround noise?

[markw]

I'm talking about ambient static noise that is on with the volume all the way down, with the computer turned of.

Offhand, I'd say it looks like it's the receiver.

The fact that it happens with the volume all the way down, even with no source, leadxs me to believe it MAY pe the power amp stages, although it could be in any stage thet follows the volume control.

Does it do it in the stereo mode? If not, then it's probably in the surround sound processor. These are known for generating some noise.

Headphones always seem to accentuate any noise in the sysytem.

[Remi]

I tried turning of just the DSP, but it changed nothing, so it has to be from amp.

What is "power amp stages"?

And how could I cure this with out replacing the receiver?