When playing TV sound on this sound bar model, a connection using a digital optical cable [OPT] is recommended. As such, by design, [OPT] is the default setting for the TV audio input of the sound bar.
If your TV does not have a digital optical output port, a connection using HDMI with ARC (Audio Return Channel function) is required. If that's your case, change the [TV AU] setting on the sound bar to [HDMI]:
- Press [MENU] on the sound bar remote control to turn on the menu on the front panel display
- Cycle through the setting items until you reach [AUDIO] and press [ENTER]
- Cycle through the setting items until you reach [TV AU] and press [ENTER]
- Select [HDMI] and press [ENTER]
NOTE: If your TV does not have a digital optical output port nor a HDMI port featuring ARC, you will have to use an analog audio cable.