User Guide for Vizio VU42LF: 

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Chapter Summary: The Audio Adjust menu operates in the same way for the HDMI Input as for the DTV / TV input in section 4.4...The menu difference is that there is no icon along the top for DTV / TV or Parental Control adjustments...

User Guide for Vizio VU42LF Users also looked at: Page 40 - Advanced Video Press the button to highlight the option for Advanced Video selection and press the OK button...A new menu will be displayed showing the advanced functions available for fine tuning of the picture... Page 55 - Color Temperature Press the button to highlight the option for Color Temperature selection...The default is COOL; this is the 6500K setting...Press the or button if you want to choose the Normal or Custom option... Page 60 - Programming for Cable Set-Top Box Manually turn on the Cable Box...Press and hold the SET button until the LED LIGHT flashes twice...If the code is accepted, the LED flashes twice after the last digit is entered...