What do you have the DVD and Wii inputs' "Video" set to in the 970's setup menu? I'd make sure they're set to "component" first. Also, do you get a signal from the 970 at all? It's possible that the component input doesn't work with a 480i signal (it's rare but not unheard of), so that you'd only be able to get a signal from the 970's component monitor output if the source was 480p or higher.