Did you try switching the input the DVD player is coming in on?
I only ask because my SO picked up the king of cheap, crappy LCD TVs this past Xmas and I was never able to get the set to accept a 480p signal from our old 5-Disc Panansonic player. When I finally got ahold of their tech support I was told that "Oh, Component 2 can't handle progressive signals. Have you tried Component 1?"
Sure enough Component 1 worked.
Anyway, not being familiar with your display's inputs I figured I'd take a stab at it. Hope someone comes up with something that works!