i have a bought a may flash ypbpr to rgbhv vga box . im trying to use my samsung 225bw to view 480p on my nintendo wii. i have all the right cables and components needed . but when i hook everything up and turn it on there is a black screen anyone can help me on this thanks.

I think the Wii will initially display at 480i, so you should connect it to a TV first, set it to just before selecting 480p, connect to the VGA box, then click OK.