OK so over the weekend I decided to move the HD cable box ( Time Warner) from our bedroom back to our living room. Also added installed a all in one surround sound system. I have a HDMI cable for each one. The issue I have is that the sound for the cable is through the TV, which is fine for normal TV but if we want to watch movie of sports would like to use the surround sound. Now the down side the all-in-one does not have a HDMI in only the out. So what I want to do until we find a receiver with HDMI ins is to run a RCA from the cable box to the audio in on the all-in-one. Which I have done but when I switch the box to receiver to that channel I get nothing. So my question is this with the HDMI plugged in does it kill power to all the other inputs?