Just an FYI -
I too had this same problem on my 52'' Vizio (model VX52L FHDTV10A) LCD TV. One second I was using my computer on the TV, the next second the whites turned PINK and the blacks turned GREEN. It looked exactly like the photo posted in this thread......snowy greens and pinks. I knew it couldn't have been pixels because they would move around.
I've only had the TV for a year and a few months, and of course it was out of warranty. I didn't want to buy a new TV already or pay out of my butt for a technician to come ($300+ at least), so I figured I'd try fixing it myself.
After researching it there's not much information out there about this problem, but I happened upon this thread. I figured "It's either the main board, or the LVDS cable." Since people in this thread had luck with the LVDS cable replacement, I figured I'd give it a shot.
I bought a new LVDS cable from vizparts.com for $21 shipped.
I've never worked on TV's but I'm good with PC's and electronics so I figured "What the hell, if I ruin it oh well."
I took the back casing off the TV, and then removed the metal housing that the main board (with all the HDMI connectors) was inside of. I looked at the new LVDS cable and tried to find a cable that matched it. On this model, it was connected to the TOP of the main board, and then goes through a hole UNDERNEATH the circuit boards and main electronics.
I tried finding where the other end connects, and realized I had to remove almost the entire metal casing that the boards sit on as the cord goes underneath this. What a pain in the butt. I unscrewed most of the metal housing and couldn't get it to snap off properly (there must've been more screws I wasn't seeing), so I just lifted the top half that was loose and could see the LVDS cable connection underneath. It was a tight fit since I didn't have the entire housing taken off, but I managed to get my hand in there, unhook the old LVDS, pull it through the hole, connect the new LVDS, and thread it back through the hole and connected it to the main board.
From there, I put all of my screws back together (probably 100 total), and then fired it up.
IT WORKED. The $21 cable fixed the problem and everything works perfectly again!
Overall it took about an hour and a half to disassemble, put in the new cord, and re-assemble. Not too bad. It's not a HARD fix, but it's one that requires you to remove a LOT of screws to get to this cable. Like I said, I'd never done anything like this before but I was able to do it without any major issues.
SO - if your Vizio TV ends up showing green "snow" on black colors, and pink "snow" on white colors - replace the LVDS cable. It fixed my problem!
Thanks to everyone in this thread who narrowed it down to this issue.