To update the software on your LG NB4540 soundbar, you can use the official mobile application or a manual USB method. Firmware updates are essential for resolving sound quality issues, fixing software "glitches," and occasionally adding new features webOS Forums Method 1: Using the LG Soundbar App (Recommended)
This is the most direct way to check for and install updates over Bluetooth. Install the App : Download the LG Soundbar App Google Play Store Apple App Store Connect to Soundbar Turn on the soundbar and set it to Bluetooth (BT) mode using the remote.
Open the app on your phone and follow the on-screen prompts to pair with the NB4540. Check for Updates In the app, navigate to Software Update
The app will display your current version and notify you if a new version is available. : If an update is found, tap
. The app will download the files and send them to the soundbar. The display on the soundbar may show [Download] during this phase.
: Once the download is complete, the soundbar will restart automatically to apply the update. During this time, the display may show [M-Update] Do not turn off the power during this process. Method 2: Manual Update via USB
If the app does not detect an update or you prefer a manual approach, you can use a USB drive. [LG TV] - How to Update the TV Software
or FAT 32 file system first download the software update file from your local LG. website go to the support page and find your TV. LG Customer Support Europe Official
Discover Latest Software, Firmware and Drivers from LG | U.A.E
To keep your LG NB4540 Soundbar performing at its best, keeping the firmware up to date is essential for fixing bugs, improving sound stability, and occasionally adding new features. While many newer models use the LG Soundbar app
often requires a manual update via USB depending on your specific region's support 1. Check Your Current Version Before starting, see if you actually need an update. : If your model supports the LG Soundbar App , open it and navigate to Software Update to see the Version Info Manual Check
: If using a remote, certain button combinations (often holding the "Settings" or "Info" button) can display the current firmware on the soundbar's front LED display. 2. How to Update Your
Since this model is part of an older lineup, the most reliable method is often using a
How to Update Your Soundbar Software To keep your Go to product viewer dialog for this item.
soundbar performing at its best, it is important to ensure its software is up to date. While newer LG soundbars often use the LG ThinQ app for updates, the typically requires a manual process via a USB drive. Where to Find Firmware Updates Updates for the lg soundbar nb4540 software update
are released to address system stability or improve compatibility with newer TVs. You can find the latest firmware files and specific installation instructions on the official support pages:
Official LG Product Support: Visit the LG NB4540 Support Page to download the latest software and manuals.
Regional Support Options: Depending on your location, you may need to visit specific regional sites like LG UK Support or LG Australia for model-specific drivers. Update Step-by-Step
Download the File: Search for your exact model suffix (e.g., NB4540.DHKGLLK) on the LG Software & Firmware page to find the correct update file.
Prepare a USB Drive: Ensure your USB flash drive is formatted to FAT32. Unzip the downloaded firmware and move the specific update file to the root directory of the drive.
Install the Update: Turn on your soundbar and insert the USB drive. The display should recognize the update; follow any on-screen prompts to begin.
Do Not Interrupt Power: Ensure the device remains plugged in and powered on throughout the process to avoid corrupting the firmware. Troubleshooting & Support
Software and Drivers: If you cannot find a specific file, check the LG East Africa Help Library or the LG USA Product Support portal for universal drivers.
Direct Assistance: If an update fails or the device becomes unresponsive, you can reach LG customer service at 1-800-243-0000 for operational support. Product Support: Support Home | LG USA Support
Connect to the Internet: Make sure your soundbar is connected to the internet. You can do this by connecting an Ethernet cable to the LAN port on the back of the soundbar or by connecting your soundbar to your Wi-Fi network through the LG Sound Bar app.
Using the LG Sound Bar App:
Via the Soundbar's Settings:
Even with careful steps, issues can arise. Here are solutions for the most frequent problems.
Absolutely. Even though the LG NB4540 is nearly a decade old, the final firmware release significantly improves stability. If you’ve never performed an LG Soundbar NB4540 software update, you are likely missing critical fixes for HDMI handshakes and subwoofer pairing. The process is free, requires only a USB stick, and takes less than 10 minutes. To update the software on your LG NB4540
Many users report that after updating, their NB4540 works flawlessly with modern 4K TVs, including LG’s own webOS models. Do not let an outdated firmware turn your soundbar into a frustrating paperweight. Follow this guide step by step, and enjoy another 5+ years of rich, room-filling audio.
Still stuck? Visit the official LG Community Forums (under “Soundbars”) where thousands of NB4540 owners share USB drives, firmware files, and troubleshooting secrets. Search for threads titled “NB4540 USB update success” for regional file mirrors. Just remember to scan any downloaded file for viruses before use.
Disclaimer: This guide is for informational purposes. Always refer to LG’s official documentation. Incorrect updates can void warranties or damage hardware. Proceed at your own risk.
To update the software on your LG NB4540 Soundbar, you can use the LG Soundbar App for a wireless update or download files directly from the LG Product Support page for a manual USB update. How to Update Using the LG Soundbar App
The simplest method is to use your smartphone as a bridge for the update. Download the App : Install the LG Soundbar App Google Play Store Apple App Store Connect to Your Soundbar : Turn on Bluetooth on your phone and pair it with the Check for Updates Open the app and select your soundbar from the device list. Navigate to Device Info (or Software Version Info). If a new version is available, an button will appear.
and wait for the progress bar to reach 100%. Do not turn off the soundbar or your phone during this process. Manual Update via USB
If the app does not work, you can perform a manual update using a USB flash drive. LG NB4540 Product Support: Manuals, Warranty & More
LG Door-in-Door® Fridges * Discover. Monitors. Laptops. Copilot + PC. Windows 11 Home PC. LG SIGNATURE. LG Experience. * Monitors. LG Electronics LG NB4540 Product Support :Manuals, Warranty & More
LG Soundbar NB4540 Software Update: The Ultimate Guide Keeping your LG NB4540 Soundbar updated ensures you get the best audio performance and fixes potential bugs like Bluetooth connectivity drops or HDMI ARC handshake issues. Whether you are looking for new features or troubleshooting performance, this guide covers every step of the update process. Why Should You Update Your NB4540?
The NB4540 is a 320W 4.1-channel system known for its slim design and wireless subwoofer. Software updates are released to:
Improve Sound Stability: Fixes audio cutting out during high-action scenes.
Bluetooth Connectivity: Enhances the pairing speed and range for mobile devices.
System Compatibility: Ensures the soundbar works seamlessly with newer 2026 LG OLED and QNED TVs. Method 1: Update via the LG Soundbar App (Recommended)
The easiest way to update the NB4540 is through the official LG Soundbar App, available for both iOS and Android. Checking for Updates
Updating the soundbar software is typically managed via the LG Soundbar app
on your smartphone. Since this model is a legacy device (released around 2014), official firmware downloads for manual USB installation are often not listed on LG's support pages. Method 1: Update via the LG Soundbar App
This is the most reliable way to check for and install available updates. LG Electronics Download the App : Install the LG Soundbar app from the Google Play Store Apple App Store Connect Your Phone : Turn on the soundbar and ensure your phone's
is enabled. Pair your phone with the NB4540 in your Bluetooth settings. Search for Update : Open the app and select your soundbar. Navigate to Software Update
The app will display the current version. If a newer version is available, tap
: 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
: Place the firmware file in the root directory (not inside a folder).
: Turn off the soundbar, insert the USB into the rear port, and turn it back on.
: The display should show "UPDATE" or a percentage. It will reboot automatically when finished. Troubleshooting & Maintenance
After restart, repeat the version check:
If the number matches the one from LG’s website, congratulations – your LG Soundbar NB4540 software update is complete.
Before diving into the "how," let’s explore the "why." LG periodically releases firmware for the NB4540 (often labeled as a model in the 2014-2015 lineup) to address:
Skipping updates can lead to a frustrating experience, especially if you’ve recently upgraded your TV to a 4K or OLED model.