Use the following guide as a reference whenever you are setting up a Lumen's Document Camera in your classroom.
Cable Connections and Setup:
Once you have the connections setup like the one above, make sure you turn on your projector next.
Now that your projector is on, you can turn on your document camera and you should see the display from the "Lady Bug" on your projector now.
If you are trying to view your computer screen but you are only seeing a black screen (even though your projector is turned ON), then try pressing the "Windows Key" + "P" to bring up the projector menu on your computer.
From that menu, you can either set your computer to duplicate its display OR to "extend" your display as if you were using the computer like an extra computer screen.