If you connected the TV and sound bar through the HDMI (ARC) port but unable to control the volume of the sound bar using the TV remote, follow the step-by-step instructions below to resolve this issue:

1. Ensure that the HDMI cable is connected to the HDMI ARC port of the TV.
2. In the TV setting -> systems, ensure that CEC controls are active.
3. Under setting ensure that the TV speakers are enabled and “S/PDIF and ARC” are set to “Auto Detect”

If you are unable to find these menu option, please contact your TV manufacturer.