User Guide for Vizio VU42LF: 

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Chapter Summary: Press the button to highlight the Contrast selection...Press the button to start adjusting the contrast and the menu page will disappear and be replaced by a small Contrast Indicator Bar so you can see the contrast level between the minimum and maximum available levels...Use the or button to adjust the level... 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...

User Guide for Vizio VU42LF Users also looked at: Page 43 - Time Zone Setting the correct Time Zone for your area will ensure that the correct program times are shown after pressing the GUIDE button on the remote control...Press the button to highlight the Time Zone selection...Press the button to select your area...... Page 49 - Check for New DTV Rating DTV Rating...If option is faded out, no update is available (the option is not activated in your area...If it is not... This option is designed to update the TV or Movie table of different ratings for programs being viewed in your local or regional area...Whenever you decide to use the Parental Control feature and this option has been activated in your area, the Check for New DTV Rating will be a solid color indicating that an update is available for the TV Rating or Movie Rating table...Observe the status of the Check for New... Page 63 - Telephone & Technical Support www.VIZIO.com... 39 Tesla Irvine CA 92618 Tel: (949) 428-2525 Fax: (949) 585-9563... 949)428-2525 Hours of operations: 6:00am – 6:00pm PST Monday – Friday 10:00am – 2:00pm PST Saturday – Sunday Please have your VIZIO model number, serial number and date of purchase available before you call... Page 65 - Specifications Colors 16.77 Million...