My Wii did the vertical red/green line things on my old Hitachi LCD (official component). I thought my Wii was damaged at first, faffed around for a couple of months waiting for replacement stock, but then hooked it up to a now new Toshiba LCD and it's completely gone. I remember trolling dozens of topics on many boards and the probolem seemed to be random, Xbox/Wii included on different TVs, even not doing on TVs that it's done on others. My only guess is it's something to do with the component input. Running in NTSC mode you get the thick red/green vertical lines, and in PAL you get the thin white/transparent vertical lines. It ****** me off no end. It was so bad I gave up playing Twilight Princess halfway through. Looking forward to going back to it and starting again.