OK, its off without wood or damage!
I put a peice of 1.25" think foam under the transformer just for a test. A little better. However the only thing which makes it go away is to disconnect both display speakers!
From before, there was a humm with all speakers removed. With the foam thats better.
So, I'm guessing there is noise coming into the sound on power somewhere? I don't care about the G.I noise, just this damm humm.
