Classroom Lectern PC or Laptop not displaying to Projector

If a classroom lectern computer or laptop is not displaying to the projector:

Verify the Lectern computer and monitor are turned on. The lectern computer is normally located below the podium keyboard tray in the rack. Look for a POWER label and press the power button.
If still no go, select an alternate video source from the touch panel or button controller, such as Bluray/DVD. Then re-select Lectern PC or Laptop.
If connecting a guest laptop, verify all adapters/cables are securely connected, and follow the steps outlined here:
- How do I Duplicate or Extend my Windows laptop display to a Projector?
- How do I Duplicate or Extend my Mac laptop display to a Projector?

If you are still having problems, submit a HelpDesk Ticket