I have two Roku soundbars hooked up to two Samsung 4k tvs. One is just a cable box and TV hookup. The other is a cable box, playstation, and TV. The PS4 is connected directly to the TV.
In either case and with both TVs, I get frequent instances where I turn on the Roku and TV and there is no sound. Or sometimes there is sound for a few seconds and it shuts off. I usually have to turn the power on and off a few times before it works. I have the audio set up to come from the Roku receiver. I've tried several power cycles. I'm not sure what the issue is. Any help is much appreciated.
We'd recommend trying both the HDMI ARC and/or the optical audio connections to connect the Soundbar to your TV for audio, and see if this helps resolve the issue you are seeing. You might also try using a different HDMI port for HDMI connections to see if this helps improve the issue.
I have the same exact issue. I turn on the Roku soundbar and my TV and the Roku part works but once I change HDMI ports for my Xbox the sound doesn’t work. I’m using the HDMI ARC port and optical cable for the Roku soundbar and still the sound doesn’t come on right away. Like the first poster. I have to keep doing a power cycle for it to maybe work half the time.