The unit went down in the middle of a show. Afterwards, I tested the lamp, which turned out to be fine, and then I put the unit into self-test mode. I can "hear" the unit working, going through its sequence, but the lamp will not light.
Fuses are okay, and all status LEDs are on and working. I have taken a brief look at the schematic, but was hoping somebody has had this problem before and knows which component has failed.