LG 42PM4700 Owner's Manual page 88

To use TV's speakers
❐
HOME ➾ Settings
When listening to the speakers on the external audio devices connected to TV
such as home theater, TV speaker may be turned off. When there are SIMPLINK
connected home theater devices, selecting
turn on home theater.
There is no sound from the TV speakers.
Delivers TV sound through external audio device speakers
Off
connected to the TV.
✎ Adjusts the volume with the knob attached to the external device.
On Produces TV sound through the TV's internal speaker.
➙ SOUND ➙ Sound Setting ➙ TV Speaker
TV Speaker to OFF will automatically