Hi! I can get my dvd player to work when plugged into the yellow video outlet on the back of the tv, but for some reason the gamecube doesn't show up. Someone suggested when I press TV/Video it needs to be on "Video 2",(DVD plays in "Video 1" I guess) and the tv is old and doesn't have that. Does this mean I need a new TV?
well if your TV only has one of theose yellow red and white plugs, then you can still get your gamecube to work with your current TV. If this is the case, you need to buy an RF Modulator, and follow hookup instructions for it. If you have more than one yellow red and white plug set, and it is labeled on your TV as an "input" then you need to press TV video. But it sounds like your TV only has one A/V input.