Kathleen,
If there are no LED lights lit on the projector, then it seems that the projector is not receiving power. You may want to try another power supply and plugging the projector to another outlet to ensure that the issue is not related to the power supply or the outlet where it is currently plugged in. Please 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: 254106, please provide the serial number of the projector.
Thanks!