Question: how to connect soundbar to lg tv with optical cable?
Answer: Connect your cable into the HDMI IN jack on the back of the unit to the HDMI OUT jack on your external device such as a Blu-ray disc player, DVD player, etc. Connect a second cable to the HDMI OUT (TV ARC) jack on the back of your Sound Bar to the HDMI IN jack on your TV. Set the input source to HDMI IN.