Reception, channel detection, network issues, CableCARD setup, etc.
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My HDHomerun Prime receives CableCard TV signals through a coaxial cable from a FIOS router and then outputs TV channels through an ethernet cable to my home network. I have a smart TV (LG 65UJ7700) and it's connected to my ethernet network and can detect the HDHomerun as a one of the input sources besides HDMI's, Live TV, etc. If the HDHomerun source is selected, the TV will list all of the CableCard TV channels (through the ethernet cable). When I watch a channel from this list, I can see a button labeled as 'Sub' at the bottom of the screen but it's always greyed out for all the channels I have selected so far. What I want to get is a function similar to what I would get when I press the CC (closed caption) on any TV remote control to show the closed caption text from a TV channel. Is there a way to get this for my LG smart TV with the HDHomerun Prime ethernet connection?