I received a Projector from a friend December of 2010. It is a Sharp D100U from 1997. It did not have the original bulb, but everything else worked fine. I did some research online to see if I could get a bulb for it and found out that it would cost me $300. I could buy a reasonable projector new for that much. All I really needed was a new light source, so I thought a high-powered LED would work great.
There were two stages to this project. The first was figuring out how to bypass the bulb checking circuit, and the second was building the new LED light source.
I found these two Instructables by claudiopolis
to be very helpful with this project: http://www.instructables.com/id/LED-Projector-Lamp-v10/ http://www.instructables.com/id/LED-Projector-Lamp-v20-in-progress/ UPDATE!
I found the maintenance manual for this projector