User Guide for Vizio VU42LF: 

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Chapter Summary: Connecting your Cable or Satellite Box (Better... Turn off the power to the LCD HDTV and HDTV Set-Top Box...Connect the Pr (red color) connector on your HDTV Set-Top Box to the corresponding Pr (red color) connector in the Component 1 group (green color area - row of connectors nearest to you when viewing from the rear of the TV) at the rear of the LCD HDTV...Select Component 1 using the INPUT button on the remote or side of the LCD HDTV, or directly by pressing the Component button on the Remote Control......

User Guide for Vizio VU42LF Users also looked at: Page 21 - Using Your Antenna or Cable for TV Turn off the power to the LCD HDTV...Connect the coaxial (RF) connector from your antenna or cable to the DTV/TV CABLE/ANTENNA connector at the rear of the LCD HDTV Turn on the power to the LCD HDTV...Select TV using the INPUT button on the remote or side of the LCD HDTV, or directly by pressing the TV button on the Remote Control... Page 61 - Using a Cable or Satellite Remote volume and mute will work... Your VIZIO remote uses codes 11758 and 10178 to work your LCD HDTV...If your cable or satellite remote uses a 5-digit code (like most Direct TV units), first try 11758 and then, if that does not work, 10178...If your cable or satellite remote uses a 3-digit code (Echostar or Dish Network for example), use code 627... Page 31 - Basic LCD HDTV Start Up The Tuner screen will be displayed; default choice is Antenna...If you are using Cable, press the button to highlight CABLE... Press the OK button on the remote control... Using DTV and TV with an Antenna or Cable... The Language choice screen will be displayed; the default English option is highlighted...If you wish to change the OSD language to Français or Español, press the button on the remote control to select the language you want...