I have a Magnavox projection TV. We just had the fluid replaced in the tubes, but now there seems to be too much green. All the blacks have a green tint to them, sometimes a "green halo" around edges. Repair guy says this is normal. I think he's on crack. Is there a way to turn the green level down? -Maybe a dial on the tube itself? (Using red/green tint menu is no help) THANKS!