Won't work on certain TVs!

[NecroDemonNZXT]

somwthing a bit dumb, if u connected the wii to any TV-side inputs, you must use the correct channel(labeled SIDE in my philips TV), and not in the standard av channel

 

[Justinyoung]

you may have connected an NTSC to a PAL device, or vice versa- i'm not too sure