U-verse TV Equipment

Just bought JBL sound bar that I would like to control with my Uverse S20 remote. I need the code but JBL is not on the list and I can't figure out how to actually contact a person at support.

Main cable box shows a red ‘X’ in the middle of my tv screen secondary box works

I have three HDMI connections in the back of my new TV, HMDI 1 has ARC in parentheses, HMDI 2 and HDMI 3 are both blank. Do I connect the U-VERSE to HDMI 1 with ARC in parentheses or either HDMI 2 or HDMI 3 which are both blank.

After changing a channel, about 30 seconds later video/sound lock, goes to signal lost, then will come back in 2-5 minutes. EVERY time channel is changed. Can go to another channel right away, it is there, then locks, signal lost, will come back.

Received MANY letters from at&t basically requiring a switch from UVerse to Direct TV streaming (fiber?). The correspondence warned that UVerse would no longer be viable. Switch completed today. Installer told me my DVR recordings and also the SCHEDULE of recordings would still be available, and tha

If my main DVR/wired cable box (the one that stores "recordings" on TV restarts (by itself?), will it interfere with any recording being done at that time. In other words, will that restart show up on recording in some way or will the recording continue as normal and not show up on final recording?

Why did I get an email from AT&T telling me not to return my equipment?

Since AT&T no longer wants anyone to discuss DirecTV or U-Verse equipment since they “only” sell it, what forum do I use?

Uverse equip does not work properly with this TV - a variety of tech's changing out all the equipment have not been able to fully get Uverse to work - latest problem is screen freezes for a few seconds - there's no pattern, it might happen 5 times in 5 minutes or may not happen for 1/2 an hour. Only

please help, I have added to my original thread