It's hard to explain but whenever I play a game I only get half the sound and the other half is like this "humming" noise? I have my NES hooked up with the AV cables whenever I use a RF switch the picture is all messed up but the RF switch works fine on my SNES? I don't know if it's because I play on a new TV, or if it's something wrong internally with my nes. Any light on the subject would be greatly appreciated.