A user has connected a PC to a portable projector, but video does not appear on the screen when the user tests the projector. The user confirms the lens cap was removed from the projector. Which of th

Adjusting keystone settings corrects the rectangular distortion of the image, but it cannot produce an image if the projector lamp is not emitting light in the first place.

Restarting the PC might resolve a software-related video output glitch, but it will not address a hardware issue with the projector, such as a faulty or unlit lamp.

If a projector is not displaying any image, verifying the functionality of its lamp is a crucial initial step. A burnt-out or non-operational lamp will prevent any light from being projected onto the screen, regardless of the input source or other settings.

Increasing the brightness setting would only make an existing, but dim, image brighter, and it will have no effect if the projector lamp is not working and no image is being projected at all.