You should be able to plug in any type of red, white, and yellow plugs to a video "in" on the receiver and as long as the main "out" goes to your tv sets "in" with all three rca cables plugged in, it should work. Have you tried hooking the karaoke machine directly up to the tv sets "ins" in the back to see if your machine actually works? You may also want to hook up the yellow video directly to the tv, and the red/white to the receiver as there is no need to run the video through the receiver. Also, make sure once your connections are correct, you are selecting the right audio or video switching. The receiver may be too old to transfer video, although I doubt it. Post some low pixel photos here of the back of the tv, receiver, and karaoke machine if you are still having trouble.