21
LED TV
FAQ
For the latest answers to Frequently Asked Questions, visit the Common Questions section at 
https://www.sharptvusa.com/support and the Support section of the Roku website (https://support.roku.com/index).
Video and audio
SYMPTOM POSSIBLE CAUSE TRY THIS...
Picture does not 
fill the screen or 
there are black 
bars around the 
picture
The picture size may 
need to be adjusted
• Adjust the picture size (aspect ratio). See the Picture Size option 
in the Options menu.
I don’t see a 
picture when I 
select an input
TV is not on
• Make sure that your TV is plugged into a working power outlet, 
and that your TV is turned on. (Your TV has a light on the front 
that indicates if your TV is turned off.)
Cables are not 
connected correctly
• 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 12 
or Connecting an antenna or cable TV (no box) on page 13.
Picture settings may be 
incorrect
• Adjust the contrast and brightness. See the TV brightness 
option in the Settings menu or Options menu.
•Adjust the TV picture.
Incorrect input may be 
selected
• Make sure that the correct input is selected for the device you 
want to view.
Input source not 
detected
• Make sure that the device connected to the input is turned on.
• Make sure that the cord to and from the device is connected 
firmly and correctly to the device and your TV.
TV input may be bad
• Connect a different device to the same input and check to see if 
it works correctly.
TV channel 
does not appear
Broadcast TV may be 
experiencing problems 
or may not be set up 
• Try another channel. The station may be experiencing problems.
• Make sure that the incoming signal is compatible.
• If you are trying to watch broadcast TV, make sure that Antenna 
TV is set up. 
Dark, poor, or 
no picture 
(screen is lit), 
but sound is 
good
Broadcast TV may be 
experiencing problems 
or may not be set up
• 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.
Cables may not be 
connected correctly
• Make sure that the antenna or cable TV is connected correctly 
and securely. See Connecting a cable or satellite box on page 12 
or Connecting an antenna or cable TV (no box) on page 13.
• 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.
Picture settings may be 
incorrect
• 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.