Do you have a switching box in the coach? Some folks call it a 'matrix'.
If you have a 'Matrix' box, determine which switch controls the BR TV & make sure it's engaged?
Should have asked this 1st, but were you ever able to get the same picture on that TV as the others?
Also make sure your over the air antenna's amplifier is turned off when using cable or the satellite antenna.
Let us know what the fix is.
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