Motorola DCH70 Installation Manual page 50

5 TROUBLESHOOTING
Problem
There is no video on
the TV screen
No closed captions
display
There are black bars to
the right and left of the
picture
There are black bars
above and below the
picture
There are black bars on
all four sides of the
picture
Possible Solution
•
Verify that the TV is powered on and set to the appropriate input source for the
DCH receiver.
•
Verify that the DCH receiver is powered on and tuned to an authorized cable
channel.
•
Verify that all video cables between the DCH receiver and the TV are firmly
connected.
•
Verify that the coaxial cable feed is firmly connected to the DCH receiver and the
wall jack.
•
If the DCH receiver video output is connected to a home theater unit, verify that
the home theater unit is powered on and set to the appropriate input source.
•
Verify that closed captions are enabled on the TV.
Note: Closed captioning may not be available on the current program.
Widescreen TVs display 4:3 programs in this format unless set to Stretch (see your TV
manual for information about stretching 4:3 video).
Some SD programs are broadcast in the letterbox format, with black bars above and
below the picture. Some widescreen TVs offer a zoom feature that may be able to
remove the black bars (see your TV manual for information about zooming 4:3 video).
This may occur on a 16:9 TV if the active video for an SD broadcast is in letterbox
format. To confirm, wait for a commercial or look for a graphic, such as a network
logo. If the commercial fills the screen from top to bottom, or the graphic appears
below the active video, the program is being letterboxed by the broadcaster. You can
minimize this by activating the zoom feature on the TV.
A broadcaster may include black bars on either side of a wide screen broadcast. This
is called a "hybrid" aspect ratio and results in a black border surrounding the video on
a 4:3 TV. Because this is part of the broadcast, the DCH70 cannot correct the video.
You may be able to minimize the border using the zoom feature on the TV.
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