Spent about an hour setting up a new 4k X1 DVR on a TCL 55S405 yesterday. No matter what I did, it would not show up on the HDMI ARC Port.
Come to find out from some web searches that it won't work. If the DVR or STB is new, self install kit, never been hooked up, you will need another HDTV to get it operating on your account. Than you can hook it up to the Roku TV OS and have a working connection. I just hope that no one runs into a situation where a Roku TV is the only thing you have access to because you will be SOL. Hope this helps anyone on here staring back and forth between the wiring and the screen hoping for an outcome that will never come...
It's laughable now, but than, I was out of my mind!!!
😉 They won't even allow the word Roku in any of the tags.