I have several OTA channels (external antenna) input to new 55" UN55DU7200B tv. It used to work normally but now if I want to increment OTA channel 17-1 upward by a single channel (to 17-3) the tv skips to OTA channel 2903. Changing channels from there, the tv increments one channel per click, as it should, until 2974, then starts at 2903 again.
I have all tv updates installed. How can I pursue this? It's too annoying to manually change channels by the 123 button.
