sounds like a specific problem that an experienced person would know.. i am not experienced with electrical problems that weird.
i'm guessing it has something to do with the blue color.
maybe its the controller for the blue crt projector.
maybe its the controller for the color blue in a crt or lcd.
sounds like the blue crt isnt getting enough power to fully scan the entire screen, which is why the side of the screen is blue shaded.
the blue dots are probably the result of whatever is left of the little power still going to the blue crt.