Kathryn,
If the projector starts up, the power light flashes, you hear the fans cycling and then the projector shuts off without striking the lamp, we recommend disconnecting the power supply from the projector for about 5 minutes to drain the projector of power. Reconnect the power supply and turn on the projector to see if the issue persists, if so, ensure that the lamp and lid are secure or the projector will continue the above behavior. At times, re seating the lamp will resolve this issue. If not, try the lamp from a working projector of the same model ensuring that the lamp and lid are secured to see if you are able to get an image. If so, contact Technical Support via the web form on the knowledge base at www.prometheankb.com, select your region/language, Projectors, Contact Us. In the Existing case field input case number:245708. Provide the serial number of the projector and if swapping the lamp resolved the issue, please provide the lamp hours that are displayed in the settings, by holding down the power button for about 1 minute, and recording the hours listed under corresponding value.
Thanks!