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To help me give you the best information for your setup, let me know:
Copy the extracted file(s) directly onto the root of your USB flash drive. Do not rename the file, as the soundbar looks for a specific filename to initiate the update. If you rename it, the system will not recognize it as a valid update package. lg soundbar nb4540 software update
Download the from the Apple App Store or Google Play Store. To help me give you the best information
If you’ve noticed intermittent Bluetooth drops, lip-sync issues, or your rear speakers cutting out, you don’t need a new soundbar. You need a firmware update. Download the from the Apple App Store or Google Play Store
Depending on your hardware setup, you can update your soundbar using two different methods. 📲 Method 1: Update via the LG Soundbar App
The latest stable version as of 2025 is Main 230412 (April 2023). If yours shows 2019 or 2020 numbers, you’re overdue.