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LC-40LB480U Full HD LED 1080p TV
Video and audio
Problem Solution
Picture does not
fill the screen.
There are black
bars around the
picture.
Change the aspect ratio. An
increasing amount of digital TV
and movies are presented in wide
screen (16:9). See the View Mode
option in “Adjusting the TV
picture” on page 40.
No picture (screen
is not lit) and no
sound.
Press on the TV or the remote
control.
Make sure that the Audio Only
option is set to Off. See “Playing
TV audio only” on page 44.
Make sure that the video cables
are connected securely to your
TV.
Adjust the contrast and
brightness. See “Adjusting the TV
picture” on page 40.
Make sure that the power cord is
plugged in.
Make sure that the correct video
input source is selected. See
Selecting the video input
source” on page 32.
Try another channel. The station
may be experiencing problems.
Make sure that the incoming
signal is compatible.
Make sure that the antenna or
cable TV is connected correctly
and securely. See “Connecting a
cable or satellite box” on page 13
or “Connecting an antenna or
cable TV (no box)” on page 16.
Check the closed caption
settings. Some TEXT modes can
block the screen.
Dark, poor, or no
picture (screen is
lit), but sound is
good.
Try another channel. The station
may be experiencing problems.
Make sure that the antenna or
cable TV is connected correctly
and securely. See “Connecting a
cable or satellite box” on page 13
or “Connecting an antenna or
cable TV (no box)” on page 16.
Adjust the brightness. See
Adjusting the TV picture” on
page 40.
Make sure that the correct picture
mode is selected. See “Adjusting
the TV picture” on page 40.
If you are using an antenna, the
digital channel signal may be low.
To check the digital channel
signal strength, see “Checking
the digital signal strength” on
page 48.
If you are using an antenna and
the signal strength is low, adjust
the antenna or use a highly
directional outdoor antenna or
set-top antenna with a built-in
amplifier.
Make sure that the video cables
are connected securely to your
TV.
The video cable(s) you are using
may be bad. Try a new set.
Try another channel. The station
may be experiencing problems.
No color, dark
picture, or color is
not correct.
Try another channel. The station
may be experiencing problems.
Adjust the color settings. See
Adjusting the TV picture” on
page 40.
Make sure that the video cables
are connected correctly and
securely to your TV.
Make sure that the antenna or
cable TV is connected correctly
and securely. See “Connecting a
cable or satellite box” on page 13
or “Connecting an antenna or
cable TV (no box)” on page 16.
If you are using an antenna, the
digital channel signal may be low.
To check the digital channel
signal strength, see “Checking
the digital signal strength” on
page 48.
If you are using an antenna and
the signal strength is low, adjust
the antenna or use a highly
directional outdoor antenna or
set-top antenna with a built-in
amplifier.
Problem Solution
65


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