I hope its the card, way cheaper than the screen, although the screen is on warranty
I am getting weird lines of dots, especially on blue and dark flat surfaces (like the start button or window title bars). The lines and dots flicker, and they seem to follow the image (i.e. if I move the window, the pattern of dots follows). The fact that it follows suggests to me that it is the graphics card rather than the screen, but I suspect there are utilities out there to test screens and graphics cards for problems and failure.
I am going to go trawl the search engines now but if anyone can recommend utilities they have used, let me know