The supported video resolution of a computer and a projector may be different.
For example: 1024x768 (projector) versus 1600x1400 (notebook).
A projector may be unable to handle projecting resolutions that are supported by the computer. Check which resolutions the projector supports and set the computer's video adapter to a resolution supported by the projector.
Additional needed steps will depend on the video adapter. Some more troubleshooting possibilities are:
1. Restart both machines.
2. Follow the video adapter's help file for connecting external display devices - normally found in the adapter's display properties.
Troubleshooting Video Projector Display Problems
