We have sound but no picture on our Wii
a DVD player using red white and yellow to the TV if you get picture and sound,
then reconnect the wii red, white, and yellow to the same input.
If only the wii does not
show video you will need new red white, and yellow cables. I would try a
friends red, white, and yellow cables first even to their TV where their wii is
If new cables are not
working you will need to contact Nintendo as there is an issue with your wii.
You can't change the wii video to progressive without a component kit,
and since you have yellow you obviously don't have a component cable for the