how to fix ground loop him?


For the first time ever, there is suddenly a him in my system. Seems to have popped up over the last few days...not sure why? Only change was I moved some wires around to get at my DVR? Not sure where to begin to find source?
joekapahulu
Thx for all the suggestions. It will have to wait for a day when the back is cooperating and I can get behind the rack. My wife keeps saying its time to simplify the setup...sadly she may be right.
Neither would I look into the ladies room to find the him, I
mean the hum.