Hi Suzette my name is Roety,
I can help you with your issue ,
First of all make sure you have an HD signal connected.
These days using a non HD box will produce a bad picture on an HD TV.
If using a cable/Dish box set the output resolution to 1081i only,
for picture controls set them all center and max out the picture/contrast control
If I have helped you with your issue please click accept.
If you have more questions you can still respond until this post expires,
I will reply asap
Thanks
I’m happy to help further over the phone at
https://www.6ya.com/expert/eric_ab7c09ec01841771
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