Try this option. First, make sure Yamaha is running lastest firmware. Connect all devices to the Yamaha and the Yamaha to the TV’s ARC input with HDMI-CEC set to on in all devices. Now, press the Home button on the Samsung remote control. Move left over to the Source tile. The Yamaha should show as a source. Move up to highlight the Yamaha tile. You will see a small arrow appear at the top of the tile. Press up on the remote control. Three options appear. Go to the top of the list for Anynet+(HDMI-CEC). Select it and a list of your controllable devices appears. You can select refresh if any of your devices are missing from the list. Selecting a device will allow control of it with the TV remote control. Does it show all of your devices? Select one of them and see if it works. If the remote control activates a device function, the Yamaha should switch to that devices input. When setup this way, using the remote control from one of the devices that is now connected via HDMI-CEC should turn on the TV and the Yamaha when they are off. Turning off the TV with it’s remote control or the device remote control should turn everything off.