According yo the manual , if you do want and "on screen display" of the soundbar , you would have to connect the tv and soundbar via HDMI ARC TV OUT.
I link up the hdmi arc out from SB400 to my Tv hdmi arc but when I turn the tv on there was no sound transmitted to the soundbar.
I then use the optic cable to test it out and tv sound get transmitted to the soundbar. But by sticking to optic cable setup, I would not get to see the soundbar on screen.
Anyone pls advise, it's frustrating to see the sb400 not work as it should.