Lg Soundbar Nb4540 Software Update [2021] Jun 2026

The app will display the current version. If a newer version is available, tap

Here is the official method to update your LG NB4540.

Turn on the soundbar, then press and hold the button on the main unit and the Sound Effect button on the remote control simultaneously for roughly 5 seconds. The display will read "RESET" . Turn the unit off and back on. You can now adjust your custom equalizer settings and re-pair your Bluetooth devices to enjoy an optimized audio experience. lg soundbar nb4540 software update

Press the button on the back of the wireless subwoofer. The LED light on the subwoofer will blink rapidly.

A firmware update acts as an operating system upgrade for your soundbar. Skipping updates can lead to performance degradation over time, especially when connecting newer streaming devices or TVs. Updating your software resolves several common issues: The app will display the current version

Press and hold the button on the unit and the number '0' on the remote control simultaneously for several seconds.

Ensure the file was unzipped and is not still inside a .zip folder. The display will read "RESET"

Open your web browser and navigate to the official for your region.

If you are unable to use the app, another potential method is through a specific key combination on the remote control. As the LG NB4540 has a basic status display, entering a "hidden key mode" might reveal the version number. The service manual for the NB4540 mentions a "HIDDEN KEY MODE" in the section just before the software update method. This often involves holding down a specific button (like "Play/Pause" or a function button) for several seconds while the unit is in a certain state. If the app is not an option, you may need to consult the user manual or search online forums for the specific key combination for the NB4540.