Sharp LC-43LBU591U User Manual page 40

Symptom
Dark, poor, or
no picture
(screen is lit),
but sound is
good
No color, dark
picture, or color
is not correct
Only snow
(noise) appears
on the screen
Picture quality is
good on some
channels and
poor on others.
Sound is good
Dotted lines or
stripes appear
on the screen
40
Possible cause
Broadcast TV may be
experiencing problems
or may not be set up
Cables may not be
connected correctly
Picture settings may be
incorrect
Picture settings may be
incorrect
Broadcast TV may be
experiencing problems
Cables are not
connected correctly
Broadcast TV may be
experiencing problems
or may not be set up
Cables may not be
connected correctly
Broadcast signal may be
weak
Cables may not be
connected correctly
Broadcast signal may be
weak
Try this...
• Try another channel. The station may be experiencing problems.
• 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 antenna or cable TV is connected correctly
and securely. See Connecting a cable or satellite box
or Connecting an antenna or cable TV (no box)
• Make sure that the video cables are connected correctly and
securely to your TV.
• The video cable(s) you are using may be bad. Try a new set.
• Adjust the brightness. See the TV brightness option in the
Settings menu or Options menu.
• Change to a different picture mode. See the Picture mode
option in the Options menu or Advanced Picture Settings menu.
• Adjust the contrast, color, and brightness settings. See the TV
brightness option in the Settings menu or the Options menu.
• Try another channel. The station may be experiencing problems.
• 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 antenna or cable TV is connected correctly
and securely. See Connecting a cable or satellite box
or Connecting an antenna or cable TV (no box)
• Make sure that the video cables are connected correctly and
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.
• If you are trying to watch broadcast TV, make sure that Antenna
TV is set up.
• 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 antenna or cable TV is connected correctly
and securely. See Connecting a cable or satellite box
or Connecting an antenna or cable TV (no box)
• If you connect to cable without a set-top box and experience
poor picture quality, you may need to install a set-top box to
improve signal reception and picture quality. Contact your cable
TV provider about upgrading to a set-top box.
• Make sure that the antenna or cable TV is connected correctly
and securely. See Connecting a cable or satellite box
or Connecting an antenna or cable TV (no box)
• Make sure that the video cables are connected correctly and
securely to your 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 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 TV to eliminate
the interference.
43"/50"/55"/65" UHD LED 2160p Sharp Roku TV
on page 22.
on page 22.
on page 22.
on page 22.
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on page 19