If a user creates a support ticket to report a conference room projector that does not work and the projector screen shows the error message “No Signal Input”, the first action that should be taken is to check the video cable and replace it if necessary. This is because the issue could be due to a connection problem, defective cables, or improper wiring from one item to the other.
Option A is not the best solution as it is not related to the issue of the projector not receiving a signal.
Option B is also not the best solution as it is related to the operating system and not the projector’s ability to receive a signal.
Option C is not the best solution as it is related to the projector bulb and not the projector’s ability to receive a signal.