User Guide for Vizio VU42LF: 

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Chapter Summary: After the TV has stored all of the available DTV channels in memory you will find that some channels will be too weak to watch comfortably or they may be channels you do not want to see...Press the button to select this channel to be skipped when using the CH+ or CH- button...You will still be able to select this channel using the number buttons on the remote control...

User Guide for Vizio VU42LF Users also looked at: Page 42 - Speakers Press the button to highlight the Speakers selection...Press the button to turn the internal speakers On or Off...You may want to turn-off the internal speakers when listening to the audio through your Home Theatre System... Page 38 - Brightness Press the button to highlight the Brightness selection...Press the button to start adjusting the brightness and the menu page will disappear and be replaced by a small Brightness Indicator Bar so you can see the brightness level between the minimum and maximum available levels...Use the or button to adjust the level... Page 10 - Rear Panel Connections For digital TV stations in your area visit www.antennaweb.org... COMPONENT 1 (YPb/CbPr/Cr with Audio L/R... theatre system, external amplifier or stereo...Speakers cannot be connected directly to here...The white color band on the rear of the TV indicates this connection...