This guide explains how to connect a soundbar (and an optional set-top box) to an LG TV using HDMI ARC/eARC, then select the correct inputs and settings so TV sound plays through the soundbar.
If the soundbar does not output TV sound or the HDMI device is not recognized, the most common causes are an incorrect HDMI port connection, the soundbar being set to the wrong input, or SIMPLINK (HDMI-CEC) being turned off on the TV.
ARC/eARC works only when the soundbar is connected to the TV’s HDMI port labeled ARC or eARC. If connected to a standard HDMI IN port, video may work but TV audio may not return to the soundbar.
If the soundbar is set to a different function (for example, Bluetooth or Optical), it will not play audio from the HDMI connection even if the cable is connected correctly.
ARC/eARC and device control features typically require SIMPLINK (HDMI-CEC). If it is Off, the TV may not route audio to the soundbar or may not switch inputs as expected.
1. Turn off the TV and the soundbar.
2. Connect an HDMI cable from the soundbar’s HDMI OUT labeled TV (ARC/eARC) to the TV’s HDMI IN port labeled ARC or eARC.
3. Turn on the TV and the soundbar.
4. On the soundbar, press the Function button (often labeled F) repeatedly and select the HDMI mode used for TV audio (ARC/eARC). Confirm the soundbar display indicates HDMI/ARC/eARC according to your model.
1. Connect an HDMI cable from the set-top box HDMI OUT to the soundbar HDMI IN (HDMI1 or HDMI2).
2. Keep the soundbar HDMI OUT (TV ARC/eARC) connected to the TV’s HDMI ARC/eARC port.
3. On the soundbar, press the Function button (F) and select HDMI1 or HDMI2 (whichever the set-top box is connected to).
4. On the TV, select the HDMI input that corresponds to the soundbar connection when needed.
Setting: Settings > General > External Devices > HDMI Settings > SIMPLINK (HDMI-CEC) > On
Turn SIMPLINK (HDMI-CEC) On, then power the TV and soundbar off and back on. This helps the TV detect the soundbar and enables ARC/eARC audio return and device control.
Press the Input button on the TV remote and select the HDMI port you used. If the TV shows the connected device name after SIMPLINK is enabled, select that device.
If the steps above did not resolve your issue, please visit the LG Electronics Support website. You can chat with our virtual assistant or schedule a service repair for further assistance.
※ Please note that service fees may apply for engineer visits if your product is out of warranty.
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