Hi, for a while now my projector has had a blue tinge around the edges of the screen. This sometimes gets worse and then goes back to the edges only. The other day the image took on a yellow image and has become very mottley. The projector is around 4 years old and is still running the original globe which has done approximately 5000+ hours. I have a spare globe but didn't want to fit it if the problem is the LCD panels.