Just thought I’d provide an update for anyone that stumbled across this. I set up my old tv with the broken screen and a Roku Streaming Stick. The sound worked just fine. So then I plugged the stick into one of the HDMI ports on the TCL and the audio from that worked great too. Then I pulled the stick out and used the built in Roku and ARC to the receiver and everything worked. Didn’t mess with any settings. Im not sure what happened or how this fixed anything, but it did. Maybe the old TV “reminded” my receiver what to do, because I tried using the streaming stick before without success.