You'll have to give a better description of your problems/symptoms. Model# of your TV will help too.
I'm going to assume you're using the component cable and that you can hook it up to the TV, but when you turn it on you get sound but no picture?
Sony Brava KDL-46V25000
I am using a 5 component cable from NYKO. H-D-Link. I pluged them in to the back got sound but the color was shades of green and not clear. When I plugged up the cable from that came with the Wii, all was fine. But I would like to use the other cable.
you may be crossing connections.
do all of the coloured connectors line up to theyre corresponding holes? are you mixing up the two red connections. there may be two red wires, one for video, one for audio. try switching them.