Overhead projectors use a bright lamp and mirrors to display text or images from a transparency sheet on a wall or screen. If your projector displays a shadow when projecting, you must troubleshoot ...

When you're scheduled to make a presentation on a digital projector, you depend on properly functioning video equipment to display the files you've prepared for your talk. Just in case, it helps to ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. CHICAGO — Before SMART boards and laptops, ...