How do I fix an LG TV that will not recognize a Polk Sigma 2 soundbar?
Answer
When an LG TV will not read a Polk Sigma 2 soundbar, start with the physical HDMI-ARC/eARC or optical path, then match the TV’s audio output to External Speaker / HDMI ARC. A TV or soundbar reset alone often fails if the cable, port, or audio-output setting is wrong.
Before you start: stop right away if…
- A factory reset of the TV or soundbar can erase settings and still fail if the HDMI ARC port or cable is wrong.
Follow these steps
Confirm the connection type and port
On the LG TV, use the HDMI port labeled ARC or eARC for the Polk Sigma 2 if you are using HDMI. If you use optical, confirm the optical cable clicks into both the TV and the soundbar.
You should see: The cable is firmly seated in the correct ARC/eARC or optical ports.
Set the LG TV audio output to the soundbar
Open the LG Sound or Audio settings and set Audio Output / Speakers to HDMI ARC (or Optical if that is your cable). Turn off TV speakers if the menu offers that choice.
You should see: The TV shows External Speaker, HDMI ARC, or Optical as the active output.
Power-cycle both devices
Turn off the TV and soundbar, unplug both from power for about one minute, plug the soundbar in first and turn it on, then power on the TV.
You should see: The TV rediscovers the soundbar, or ARC/optical audio starts working.
Try a different cable or ARC setting
If the LG still does not recognize the Polk after a prior full reset, swap in another HDMI cable rated for ARC/eARC, or temporarily test optical if available. Avoid random “reset again” loops until the cable path is verified.
You should see: The TV detects the soundbar, or you have isolated a cable/port hardware fault.
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Extra tips
What to look for: Whether the soundbar is on HDMI ARC/eARC or optical, the LG audio output setting name, and whether the TV lists the Polk as an external speaker after reconnect.
Before you change anything: Note whether you use HDMI ARC/eARC or optical between the LG TV and Polk Sigma 2. Have a second HDMI cable ready if possible. Write down current TV audio output settings before changing them. Unplug power only after both devices are turned off if you power-cycle.