I just bought a NAD T753 and have noticed that there is a hum when my television is on. When I turn it off the hum is gone. I disconnected the cable from my Monster Cable HTS1000, but the hum remained. I disconnected the interconnects from the TV to the NAD; again the hum remained. It is a problem when the input for TV or DVD is chosen and the TV is on. The hum comes from the speakers and not the receiver itself. With the TV off, there is no hum when listening to the DVD input. I know ground loops are common, but can anybody help me save what litle sanity I have left?