Lg Soundbar Nb4540 Software Update | Fast — 2026 |

The most reliable method is using the dedicated smartphone application.

If you encounter any issues during the update process, refer to your soundbar’s user manual or contact LG customer support for assistance." lg soundbar nb4540 software update

If you prefer a manual method or do not have access to the app, you can use a USB flash drive. LG NB4540 Product Support :Manuals, Warranty & More The most reliable method is using the dedicated

: If you are having HDMI ARC or Bluetooth stability issues, switching to an Optical (Toslink) cable is the most reliable way to maintain audio sync on this older model. If the app does not work, you can

If the app does not work, you can perform a manual update using a USB flash drive. LG NB4540 Product Support: Manuals, Warranty & More

The NB4540 . It does not update over Wi-Fi or Bluetooth.