Is there any reason why it does this? It's going into one of those multi system switch boxes. My Gamecube and PS2 use the red/white/yellow cables and go into the box, and S-video goes out of the box into my TV and those systems work, but by SNES and Dreamcast, using the same type of cables, won't show video on my LCD. Why is that? I figure the Duo I should be picking up soon will be the same way, and I want to play video games on my dang tv...what's up?