Make certain you have read the Dell 3400MP Projector manual thoroughly before attempting the Dell 3400MP Projector bulb replacement on your Dell 3400MP Projector. Without touching the surface of the Dell 3400MP 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 Dell 3400MP Projector replacement parts. Your bulb should be sitting just beyond the opening of the Dell 3400MP Projector body. Reach in with two fingers and disconnect the Dell 3400MP Projector bulb. Reverse these steps to re-assemble your Dell 3400MP Projector. This concludes the Dell 3400MP Projector review - be sure to read the entire Dell 3400MP Projector manual.