Mark I found the fix! If flip the projector over and look at the space where the bulb unit goes, there is a little piece if medal that juts out from the side. They don't talk about it in the user guide but it is some kind of sensor. The prong on the back of the door is supposed to push it over when you replace the door, but it doesn't. I don't know what they did at the factory to get it to stay over but I tried repositioning that door 50 times without success. So I used a peice of electrical tape, to hold it down and now It works fine.

Hope this solves your problem it did for me. Mark I found the fix! If flip the projector over and look at the space where the bulb unit goes, there is a little piece if medal that juts out from the side. They don't talk about it in the user guide but it is some kind of sensor. The prong on the back of the door is supposed to push it over when you replace the door, but it doesn't. I don't know what they did at the factory to get it to stay over but I tried repositioning that door 50 times without success. So I used a peice of electrical tape, to hold it down and now It works fine.
Hope this solves your problem it did for me.

Great thanks! I wonder why they don't mention this in lamp change instructions?? Great thanks! I wonder why they don't mention this in lamp change instructions??