Mittisubishi Projection TV WT- 46805 severe color conversion problem.

Hi, all of a sudden my Blue color does not line up any more, all the colors are ok in the center of my screen but the futher away from the middle of the screen the more misalighned the blue lines go.

I reset the factory settings and no help. the convergance works horizantally, but i get no responce when i try to adjust vertically. all four corners are off alignment and the center of the picture looks great. any ideas?

thanks

Vinny G