Hi there

Appoligies for the 'later' reply.

I think your problem lies in the "Settings" of the Soundbar itself.

1. Press the "AMP" menu on the CT260H remote control
2. Scroll down until you find "Audio" and press arrow across
3. Scroll down to "TV Audio" and press arrow across.
4. Select "TV(HDMI)" as the option.  By default, the setting is "Optical"
5. Once set, exit out of the AMP menu
6. Select the "Input" source on the Remote control and choose "TV(HDMI)"
7. And that should be it.

See pages 18 and 25 of the manual : HERE for more information (or better instructions).

Cheers