I recently acquired a Vizio 26 inch LED LCD TV, and the picture looks awesome. The only problem I have with it is the weird effect I see when the screen is black and the video feed is coming from the 360. I see a weird ripple effect, like wave after wave is hitting the screen. It only showed up when I told the 360 to output to 720p, which the TV supports. Has anyone experienced this before?

It's an HDMI cable. Maybe it's because I have a really cheap one?
EDIT: Okay, this is really crazy. Even though Sam's Club said this TV doesn't support 1080p, guess what? It does! Why would they lie about something like that?
EDIT 2: Even at 1080p I still see the ripples. It's not noticable when I'm playing a game or watching a movie, unless the scene gets really dark.

Forget this one, it for a European fix

I had a similar experience with my tv, I had to buy that because getting a full hd display would have used every cent I had and there were games I wanted. I regretted it for days afterwards until I switched to my 360 and noticed the little info box said it was running in 1920x1080. Damned good bargain
So does full hd solve the wavy problem?
Try the 360 component cable if you've still got it, it'll eliminate the cable as the problem. There really isn't any such thing as a cheap hdmi cable (well barring shoddy construction and the like), since its digital it either works or it doesn't

I just found a solution! I changed the TV settings to game, and the picture became more vibrant, and now I don't see those lines anymore.

never mind