Sharp ROKU LC-43LB371U User Manual page 73

Symptom
Dotted lines or
stripes appear
on the screen
Double images Broadcast signal may be
The picture has
a few bright or
dark spots.
Good picture,
but no sound
68
Possible cause
Cables may not be
connected correctly
Broadcast signal may be
weak
weak
This is normal in LED TVs
Volume is down or
muted
Headphones may be
connected
TV speakers may be
turned off
You may need to change
the audio mode
Home theater system,
sound bar, or external
speaker system may not
be turned or may not be
set up correctly
Bad content, no audio
Cables may not be
connected correctly
LC-43LB371U/LC-50LB371U 43"/50" 1080p, 60Hz, LED Sharp Roku TV
Try this...
• Make sure that the antenna or cable TV is connected correctly
and securely. See Connecting a cable or satellite box
page 15 or Connecting an antenna or cable TV (no box)
page 18.
• Make sure that the video cables are connected correctly and
securely to your Sharp Roku TV.
• The video cable(s) you are using may be bad. Try a new set.
• 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.
• Other devices (for example, a surround sound receiver,
external speakers, fans, or hair dryers) may be interfering with
your Sharp Roku TV. Try turning off one device at a time to
determine which device is causing interference. After you have
determined which device is causing interference, move it
further from your Sharp Roku TV to eliminate the interference.
• 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.
• If you are using an antenna and the signal strength is low,
switch to a cable or satellite box.
• A few bright or dark spots on an TV screen is normal. It does
not affect the operation of your Sharp Roku TV.
• Increase the volume.
• Make sure that the sound is not muted.
• Make sure that you do not have headphones connected. When
headphones are connected, no sound comes from your Sharp
Roku TV speakers.
• If you want sound to play through your Sharp Roku TV
speakers, make sure that your Sharp Roku TV speakers are
turned on. See Turning off your Sharp Roku TV speakers
page 60.
• Change to a different audio mode. See
mode on page 60.
• If you are using a home theater system, sound bar, or external
speaker system, make sure that it is turned on and is not
muted and that it is set to the correct source.
• If you connected an ARC audio device to the HDMI 1/ARC
jack, make sure that you have turned on the ARC feature. See
the HDMI ARC option in
on page 61.
• If you are using a home theater system, sound bar, or external
speaker system and have connected it with a digital audio
cable, see Setting up a digital audio connection
• Make sure that the audio cables are connected correctly and
securely to your Sharp Roku TV.
• Make sure that the selected channel or content is intended to
be broadcasting with sound.
• Make sure that the antenna or cable TV is connected correctly
and securely. See Connecting a cable or satellite box
page 15 or Connecting an antenna or cable TV (no box)
page 18.
• The audio cables you are using may be bad. Try a new set.
Changing the audio
Setting up a digital audio connection
on page 61.
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