■Make sure your computer’s resolution setting is correct. Ideally, it should be 1024 × 768 to match the projector’s native resolution. If this option isn’t available, select one of the other compatible video formats listed on page 98.
■Windows:
■Macintosh OS X:
On the Apple menu, choose System Preferences, then click Display or Displays. Select a different resolution.
■Macintosh OS 9.x:
On the Apple menu, choose Control Panels, then click
Monitors or Monitors and Sound. Select a different resolution.
■You also may need to modify existing presentation files if you created them for a different resolution. See your software documentation for specific information.
The image isn’t rectangular, but
■Make sure the projector isn’t placed off to one side of the screen, at an angle, or the image won’t be rectangular. Place it directly in front of the center of the screen, facing the screen squarely.
■If you’ve tilted the projector upward, the image will be broader at
the top. Hold down the 
or 
buttons on top of the projector until the image is rectangular.
The image contains static or noise.
■If you’re using a computer cable longer than 6 feet, or an extension cable, the image quality may be reduced.
■Keep your computer and video cables separated from the power cord as much as possible to prevent interference.
86Solving Problems