Epson 821p User Manual download pdf (Page 85)

Solving Problems 85

■ Macintosh OS 9.x:

On the Apple menu, choose

Control Panels, then click

Monitors or Monitors and Sound. Select a different

resolution.

If this option isn’t available, select one of the other compatible

video formats listed on page 96.

■ You may also need to modify existing presentation files if you

created them for a different resolution. See your software

documentation for specific information.

■ If you’ve set up your projector and computer to display the same

image simultaneously, the projector may only project half the

image. Turn off the dual display settings.

The image isn’t rectangular, but trapezoid-shaped.

■ 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. Turn on Auto Keystone correction as described on

page 57 or 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.

■ The video signal may be split between the computer and the

projector. If you notice a decline in the projected image quality

when the image is displayed simultaneously on your notebook

computer and the projector, turn off the notebook’s LCD display.

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Epson 821p User Manual Page 85