Quote:
Originally Posted by GroundUrMast
The station may have made a minor change to their multiplexing equipment in error or intentionally. If so, and if they backed the change out, the problem as seen on your end would have gone away. Most TVs can figure out some of the minor changes made by the broadcaster, some TVs firmware is less able and will require a rescan to figure out how many programs are available on a given real channel and what the virtual channel ID(s) are.
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As an interesting (to me) aside, two new sub-channels showed up in the last year (Grit-TV and Get-TV), piggy-backed onto existing channels of course. They weren't on the channel list in the setup menu until they suddenly were, and I hadn't done any rescans since well before that. So apparently my Panasonic plasma will detect and add a sub-channel on it's own. Perhaps not all do, and perhaps if the station changes something and one of the OP's three tvs can't self-adjust, it would explain what happened. That's a lot of 'perhapses', though.