I should have stated I use a Roku that is located on a rack in a media closet. Sorry! With the old baluns, I can watch YouTube TV, Netflix etc on the Samsung apps directly (not using Roku) from the tv with the tv speakers (not built-in ceiling speakers). If I use the C4 remote, watch, then Roku, I cannot use the Roku apps. They are constantly buffering or freeze.
Currently, I am trying to use the Roku through the C4 remote, which used to be easily done, but only buffers over the last few months, thus trying to replace baluns. Since I changed baluns, I cannot even turn on the tv with the C4 remote. I have the receiver balun along with the HDMI out, CAT in, and blaster on the tv (photo 3). The transmitter is on the rack connected to HDMI in, power source and Cat out (as seen in photo 1. The C4 app on my phone shows the tv is on, but it is not.
Thank you!