Final answer:
The best first step would be to check the physical connections between the laptop and the projector. Restarting the laptop and adjusting the display settings on the laptop can also be helpful troubleshooting steps. Ensuring the projector is powered on and set to the correct input source is typically one of the last steps to try.
Step-by-step explanation:
The best first step to try in this situation would be to check the physical connections between the laptop and the projector. Sometimes, a loose or faulty cable can prevent the video from displaying on the projector. Once the connections have been verified, the user can proceed to other troubleshooting steps if necessary.
Restarting the laptop and trying to connect to the projector again (option B) can be a useful step if the issue persists after checking the physical connections. This can help refresh the connections and establish a proper connection.
Adjusting the display settings on the laptop to extend or duplicate the display (option C) would be relevant if the physical connections and laptop restart do not resolve the issue. This step can ensure that the laptop is correctly recognizing and outputting video to the projector.
Ensuring that the projector is powered on and set to the correct input source (option D) is important, but it is typically one of the last steps to try. However, if the projector is not receiving any signal at all, checking its power and input source would be necessary.