I acquired 2 Viewsonic PJ800s, and both have the same ailment: they seem to display ghosts of the image. For example, green lines will show up multiple times (vertically, horizontal is fine).
One projector will actually correct itself on the green ghosting/ doubling issue if you let it run for 5-10 minutes, but it does the same with red, and is very icky looking.
Any ideas?