Hi, I'm Pete. Welcome to JustAnswer! I'm reviewing your question now, and will post back with your reply ASAP.
Ben, you might need to adjust the brightness up or down.
Also verify that the appropriate input source is selected and the cables are connected securely.
Let me know if that helps?
Ok, if you aren't even getting the BenQ splash screen then no image is being processed at all by the DLP chip.
Could any tools have come into contact with the DLP chip, or could any internal connections or components have been damaged in any way during the new lamp installation?