Vizio SV420 User Manual page 61

Problem
The display image does not
cover the entire screen.
You can see a picture but you
cannot hear sound.
The TV has pixels that are
always dark or colored.
You see "noise" or "trash" on
the screen.
You switch to a different input
and the volume changes.
You switch to a different input
and the screen size changes.
Tips for High-Definition Users.
Tips for Letterbox Content
Users.
Version 3/9/2009
Solution
If you are using RGB mode, make sure that H Size and V Position in the On Screen
Display (OSD) are set correctly.
If you are using TV, AV-C (Composite), AV-S (S-Video) or Component with 480i
input, follow instructions in page 46 to obtain the desired screen mode.
Make sure that the volume is not turned down.
Make sure that the sound is not muted.
Make sure that your audio input source cables are connected securely and correctly.
Your HDTV is manufactured using an extremely high level of precision technology,
however, sometimes some pixels of your HDTV may not display. Pixel defects
within industry specifications are inherent to this type of product and do not
constitute a defective product.
When your HDTV's digital capabilities exceed a digital broadcast signal, the signal is
up-converted (increased) to match your TV's display capabilities. Up-converting can
cause noise or trash.
The TV remembers the volume level from the last time you adjusted it. If the sound
level is higher or lower from another source, then the loudness will change.
The TV remembers the viewing mode from the last time you used a particular input
(AV-C (Composite), AV-S (S-Video), Component, HDMI and TV).
The HDTV is an ideal platform for viewing High Definition Content.
Best Image Quality will be achieved by the HDMI Input, then YPbPr, then RGB.
However, due to variances in broadcast practices, it is possible some image
distortions can occur.
Letterboxed (or "Widescreen") versions of DVD movies are most commonly
formatted for standard 4:3 Televisions. The HDTV has the capability of expanding
this content so the entire screen is filled at the expense of image accuracy. Follow
the instructions in page 32.
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VIZIO SV420M & SV470M User Manual