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:
I am entering this Instructable into a couple of contests, so if you like it or if it helps you with your own projector please vote.
Step 1: Bypassing the Bulb Checking Circuit: Observations and Research
I did some research online to try and find any documentation on the projector. All I was able to find was the user manual. Reading it I found the section that addressed the indicators: Power, Bulb, Temperature. There are three possible states for each indicator: Solid Green, which indicates Normal operation; Blinking Green, which indicates Starting up; and Solid Red, which indicates a problem.
I removed the top case and accessed the main logic board. My intent was to find the logic signal that was telling the the board that there was a problem with the bulb.
I used my multimeter with the ground connected to a grounding point on the projector and started measuring values of all the wires going to the main logic board.
I was lucky to find that each set of wires was labeled, but it was only abbreviations. After I recorded all the wires in each state, I made some assumptions as to what each set of wires went to.
RC - Remote control (Since i did not have a remote for the projector and did not want to buy one I removed this wire and sensor)
BL - High voltage and lamp check circuit ( This is the wire set that I finally figured out was the one I needed to focus on )
LF - Bottom fan cover sensor ( The two wires on this connector need to be cut and tied together if you want to be able to run the projector with out the fan cover )
FF - Fan
LL - Lamp cover sensor ( The two wires on this connector need to be cut and tied together if you want to be able to run the projector with out the lamp cover )
Q - Temperature sensor
FN - Fan
There was also a set of colored wires in one connector that I also recorded, but these ended up not being needed to modify the projector.
WHEN CUTTING AND TYING THE WIRES TOGETHER MAKE SURE TO CUT A COUPLE INCHES AWAY FROM THE CONNECTOR. THE WIRES SHOULD BASICALLY BRIDGE THE CONNECTOR. DO NOT SIMPLY CUT THE WIRES OFF OF THE CONNECTOR. ON THE OTHER HAND, THE ORANGE WIRE NEEDS TO BE CUT OFF OF THE CONNECTOR.