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.