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Hi and welcome to JustAnswer,
Thank you for the question and your patience. Should you still need assistance for information purposes only...
Initially, bear with us; re-confirm and post back if the TV is directly connected to an antenna or cable feed. Or is there a cable box or satellite receiver used? If the latter, please describe how the cable box is connected to the TV using what kind of cable(s).
The model number of the satellite box please?
And confirm that the TV has to be set to Ch 3? ...or 4?