This guide explains how to route set-top box video to your LG TV while sending audio to an LG soundbar using HDMI IN on the soundbar and HDMI ARC/eARC to the TV.
If the HDMI cables are connected to the wrong ports, or the soundbar is set to a different input than the HDMI port used (HDMI1/HDMI2), the TV may show video but the soundbar will not play audio. Audio can also fail if the TV is not using the HDMI(ARC) output mode or if SIMPLINK (HDMI-CEC) is turned off on the TV.
The set-top box must connect to the soundbar HDMI IN, and the soundbar HDMI OUT (TV eARC/ARC) must connect to the TV HDMI IN (ARC/eARC). If either cable is connected to a non-ARC TV port or to the wrong soundbar port, audio may not route to the soundbar.
If the set-top box is connected to HDMI1 (or HDMI2) on the soundbar but the soundbar is set to a different function, the soundbar will not play the set-top box audio.
If the TV is not set to output sound to an HDMI(ARC) device, or if SIMPLINK (HDMI-CEC) is off, the TV may not send audio to the soundbar or may not control it properly.
1) Connect an HDMI cable from the set-top box HDMI OUT to the soundbar HDMI IN (HDMI1 or HDMI2).
2) Make sure the cable is fully inserted on both ends.
1) Connect a second HDMI cable from the soundbar HDMI OUT labeled TV (eARC/ARC) or TV (ARC) to the LG TV HDMI IN port labeled ARC or eARC.
2) Turn on the TV, soundbar, and set-top box.
Press the soundbar Function button (F) repeatedly until the display shows HDMI1 or HDMI2 (whichever you used). When selected, the soundbar display typically shows HDMI, indicating the HDMI audio path is active.
Setting: Settings > General > External Devices > HDMI Settings > SIMPLINK (HDMI-CEC) > On
On the LG TV, turn on SIMPLINK (HDMI-CEC) so the TV can communicate with the soundbar over HDMI.
Then set the TV audio output to the connected soundbar (commonly shown as HDMI(ARC) Device) in the TV Sound settings. The exact label may vary by model.
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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