A technician is setting up a projector for a videoconferencing system. When the user attempts to connect a laptop to the system, the system displays the following error message:
no source found
The user tries multiple cables and inputs on the projector. Which of the following should the user try NEXT?


A. Check the bulb on the projector and replace it with a new one.
B. Check the display settings on the computer and set them to extend/duplicate.
C. Replace the projector with another known-good one and try again.
D. Replace the video card on the machine that is plugged in to the projector, as it has gone bad.