plasma model 42mf230a no picture has sound

[drfire08]

I own a magnavox model 42mf230a it has no picture just sound. I was told to replace the buffer boards both upper and lower and the other board model#lj92-01200a. Is there a way to fix these with out send them out or buying new ones? If yes can someone tell me how to fix these or what parts i need to replace on these boards?