First make sure all connections are secure tightly, then I was told by a cable dude, to make sure no cables and power wires overlap/crisscross. This is a classic interference fix. As for the periphials, use a standard rf modulator switch if you have several devices hooked to one tv.(stand alone dvd player, vcr, other gaming consoles, etc....) Some times the whole problem is just very slight interference in the signal somewhere. I have a PS2, Xbox, Gamecube, Stand Alone DVD player and VCR all on one tv. Every time i neatly run the wiring as not to cross or overlap this has always worked for me. IF this does not fix the problem then you may have a bad cable. To trouble shoot this just use one device at a time to see where the problem is. Another problem could be a device itself but less likely than a simple cable interference prob. Hope this helps!
