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Lg Soundbar Nb4540 Software Update Work May 2026

LG NB4540 soundbar is a sleek, 4.1-channel system known for its slim profile, but keeping it in peak condition requires the occasional digital "tune-up."

  1. Turn on the Soundbar.
  2. Press the Function button on the remote or unit repeatedly until the display reads "USB".
  3. Press and hold the (i) button (or the Info button) on the remote for a few seconds.
  4. The display will show the current software version. Note this down.
  • Cause: Region mismatch. LG often releases updates only for certain regions (e.g., USA, Korea, Europe).
  • Fix: Change your LG support site region to "United States" or "Korea" to download the file. The firmware is usually universal.
  1. Ensure internet connection: Make sure your soundbar is connected to the internet.
  2. Go to Settings: On the soundbar, go to Settings > Advanced Settings > Software Update.
  3. Check for updates: Select "Check for updates" and the soundbar will search for available updates.
  4. Download and install: If an update is found, select "Update" to download and install it. The soundbar will automatically restart during the update process.