Problem: My classroom has a document camera, and nothing is showing on video projector screen.

Answer: If you are in Crabiel Hall, make sure that the video selector switch on top of DVD/VHS deck is set to "DOC CAM", and VIDEO button is pressed on projector control panel on wall.  If you are in any other building on campus, try pressing the VIDEO button on the control panel on the wall.  You may need to press it multiple times.