LG BP250 DGBRLLK Troubleshooting Manual page 7

1) If the buttons on the sound bar doesn't function or if it doesn't produce sound, you
may initialise the sound bar.
(The way of initialising the sound bar may differ by model.)
2) To initialise, please turn on the sound bar.
3) Press "-" or "STOP" button of the unit and "0" button of the remote control at the
same time and hold them for more than 5 secs.
4) "E2P CLR" will appear on the display window and it will be turned off automatically.
5) Turn on the power again. If it works properly, then it means it is initialised correctly.
[Power ON]
[Hold "-" or "STOP" button of the unit and "0" button of remote control for 5sec.]
[E2P CLR] [Power ON ]