HP mp3130 User Manual page 62

Fixing Problems
If the image is out of focus:
If an upside-down or reversed image is displayed:
If the image is too small or too large:
If the image has slanted edges:
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Be sure the lens cap is removed.
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While displaying the on-screen menu, adjust the focus ring. (The
image size should not change; if it does, you are adjusting the
zoom not the focus.)
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Ensure the projection screen is 1.2 to 12 m (4 to 40 ft) from the
projector.
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For a computer connection, set the display resolution on the
computer to 1024 x 768 pixels.
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Check the projection lens to see if it needs cleaning.
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The projector has been set to the wrong position setting. Open the
on-screen menu, select Setup > Projector position, and select
the correct setting.
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Adjust the zoom ring on top of the projector.
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Be sure the projector is 1.2 to 12 m (4 to 40 ft) from the
projection screen.
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Open the on-screen menu and select Adjust picture > Aspect
ratio. Set to Best Fit or Fill. For a wide-screen picture, try setting
the aspect ratio to 16:9.
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As much as possible, reposition the projector so that it is centered
on the screen and below the bottom or above the top of the screen.
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The projector can automatically correct slanted sides of the
picture when the projector is tilted up or down. However,
additional corrections might be required in certain situations.
Open the on-screen menu and select Adjust picture > Keystone
correction. Adjust the horizontal and vertical settings as needed
or enable or disable the auto keystone correction.
User's Guide