Sanyo flatscreen tv problem?

I have 5 month old Sanyo 19" flat panel tv that has chosen not break itself. The tv has been barely used, probably only have watched 2 movies on it and played wii on it twice. Was watching a dvd yesterday, put it on pause for a couple hours then when I came back to it, the screen was black and it flashes "video 3" in the corner every 5 seconds. The remote does not work with it now, and trying to press the power button the tv itself does not work. I have unplugged the tv, the dvd, wii, everything multiple times, and when I get the tv on, all it does is stay on the black screen, which flashes its video 3 every 5 seconds. I can't change the video outputs or anything with it. BTW, the tv does not have cable or satellite hooked up to it.
Any ideas on what went wrong or how to fix this?
 
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