Picture goes to black screen every 2 seconds, but audio continues.
Having the same issue after about a month of having a new Samsung TV and new Roku Smart Sound bar. When TV is first turned on the picture goes to black every 2 seconds but still has sound, after about 2 minutes picture stays on. Found out if we don't use the TV through the Roku sound bar but instead just use the Samsung TV, the picture and sound is fine when the TV is first turned on. Then we switch over to Roku and it seems to be stable.
Re: Picture goes to black screen every 2 seconds, but audio continues.
A similar thing is happening with the new 2020 Roku Soundbar that I just purchased. Video and audio work fine (whether I am streaming video or just on the Roku home screen), but then about every 5 minutes or so, the video will go black for about 1-2 seconds, yet the audio continues.
I am using the HDMI cable that came with the Soundbar, which is plugged into my Vizio TV's HMDI (ARC) port.