my Bose Cinemate 1SR iis not working with my 2017 LG. I conected the followed ever bit of trouble shooting and directions I find, to no avail. Despite being connected to the audio out and turning the TV speakers of or all the way down no sound comes out. I bought this system second hand and it worked during demostration. For the sake of this system's life please help or to the trash it goes.
Curiously how do you have the system connected to the TV? Is that via the RCA (red and white) cabling, digital coaxial, or the optical cable? Also, what would be the model number of your TV? Have you tried to connect a device directly to the system such as a cable box or DVD player?
Let us know the answers to the questions above and we can take it from there! Thanks!