I have a J-tech HDMI 1-input to 2 output splitter. I want to use it to watch our cable tv inside and outdoor tv projection screen in the backyard, i can see the picture for both but no sound? I have used this set up twice now without issue, looking for ideas of what it could be. I know that the order of set up can effect the success, I have tried several ways with no luck. I am using two receivers by the way.