I just bought an Onn Roku Sound bar for our children's tv and it won't complete the setup process. It's connected via HDMI ARC and setup is fine until I get to the option to select automatically detect display. One I do that the screen goes dark and will not continue setup. LED indicator is blinking orange and will sit there for hours doing nothing. I've attempted resetting several times and tried using the optical cable as well just in case and still nothing. I can hear audio if I try using the remote but setup will not continue.
Please send me a PM with your Roku account email address, and include the serial number/device ID on the Roku device along with a summary of the issue you are experiencing. I'll be able to assist you further from there.