WASHED OUT PICTURE - service technician said its...

Question

I got a diagnosis of the tv and he said its the video board.. then he gave me this part number p42hd-74-V which is weird part number because i cant find anything about that part number.the problem is that the picture looks washed out no matter what source its from. like there is not much colour and not much black. anyone could help and point me in the right direction for parts