Lg Soundbar Nb4540 Software Update Jun 2026

: You can find original setup guides and technical documentation on the LG NB4540 Support Page If you are experiencing a specific issue like Bluetooth dropping no sound from the subwoofer

: Do not turn off the soundbar or disconnect your phone until the process reaches 100% and the soundbar restarts. Method 2: Update via USB (If Applicable) If you find a specific firmware file on an official LG Support region site , follow these steps: Format USB : Use a USB drive formatted to lg soundbar nb4540 software update

If the soundbar does not say "UPDATE":