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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, was the Sony KDP-51WS655 working before with the old antenna?
Why the change of antenna?
Is the original remote available/usable? ...if yes, what steps / buttons have you tried please?
Or can you try following the instructions HERE ?
Please follow the tuning steps shown at https://dl.dropboxusercontent.com/u/92079112/Sony%20KDP-51WS655%20Tuning%20Steps.pdf
To perform "Auto Program", please follow the steps from the procedures HERE.