I have the Samsung Q70R 75" with the same problem. My Bose Cinemate Series II won't power on or off with the Samsung remote. I'm also using the optical Port connection. Volume and mute buttons work fine but the power button on the remote will not turn the Bose system on or off with the TV. Has anyone solved this issue?
I had same problem. During set up, power test need 3 or 4 times test and eventually it succeeded in connection with cinemateseries2 but when power off and on tv, it lost control of power on/off of speaker.
Experiencing the same problem, but also can't adjust volume with the remote neither. Power on/off test works after the second try though, but then the settings are lost, and it does not power up when the TV is turned on.