User Guide for Vizio VU42LF
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Press the button to highlight the Access Code Edit selection...Enter the new, 4-digit password using the number buttons on the remote...Enter it a second time to confirm you entered it correctly...
The Contrast adjusts the white levels in the picture...If the contrast is too low the picture will look washed out and if the contrast is too high you will not be able to see any detail in the bright parts of a picture...
