I do not have your model and only share because it may help. What was it? The set figured out there was no antenna and dropped the option to scan. A too smart TV.
Worked flawlessly for years. The settings option no longer features the "search" feature for viable channels where one can 'tell' the TV to search for channels. The option has disappeared in recent weeks but also returns. Remote is in perfect condition. Link shows what my "setting page" looks like. Guidance sought. Google site link below:
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