Ok, I've given this some thought, and I'm confused about a few things.
Since my primary monitor is the 73, and it runs through the receiver, it would make sense that it would turn off if the receiver was turned off.
But my secondary monitor gets it's input directly from the video card (DVI), without passing through the receiver.
My secondary monitor SHOULDN'T EVEN KNOW if the receiver is on or not.
This has to be a Windows or Catalyst setting.
I can't believe that the solution is to put my task bar on a 19" monitor 8 feet away from me and use my big monitor right in front of me without a task bar.
I just don't accept that answer.
I've drawn this out to simplify my setup: