Sounds to me like a problem w/ your a/v cables. If you have another Nintendo system around, try using the cables from that system (except the Wii which has a different plug). If you don't have any hanging around, you could probably buy a pair of Gamecube a/v cables (red/white/yellow) to hook up to your RF modulator OR simply a Gamecube RF modulator for cheap at a local store that sells game accessories. You'd definitely find one at a place like GameStop. Plus, if the cables you buy don't work, you can always return them.