Make certain you have read the ViewSonic PJ1172 LCD Projector manual thoroughly before attempting the ViewSonic PJ1172 LCD Projector bulb replacement on your ViewSonic PJ1172 LCD Projector. Without touching the surface of the ViewSonic PJ1172 LCD Projector lens, remove the lens tube and set it aside. Write down the number from inside the tube's inner lip for the purpose of make, model or serial number for any future need to buy ViewSonic PJ1172 LCD Projector replacement parts. Your bulb should be sitting just beyond the opening of the ViewSonic PJ1172 LCD Projector body. Reach in with two fingers and disconnect the ViewSonic PJ1172 LCD Projector bulb. Reverse these steps to re-assemble your ViewSonic PJ1172 LCD Projector. This concludes the ViewSonic PJ1172 LCD Projector review - be sure to read the entire ViewSonic PJ1172 LCD Projector manual.