I have a Samsung TV as well as a Q90R Soundbar. It has been working fine then one day the soundbar will not turn on automatically when I turn on the TV. If I turn it on at the soundbar button, everything works as expected. The soundbar remote that came with it will not power up or down the soundbar it it works for the TV power, source, and volume button (for the TV only, obviously).
I believe i need to repair/sync the soundbar remote, but I can't find the instructions to do so. And I hope somehow that would fix the auto on thorugh TV once that's fixed. but not sure how the two are related as I am using HDMI ARC connection between the TV and the soundbar.
Hey! Thanks for reaching out, try this link out and keep us updated.
Could you send me a private message with your full model number and serial number?