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
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
Updates for the soundbar are primarily handled through the LG Soundbar app or manually via USB if specific firmware files are released by LG. Because this is an older model, official software updates are rare and typically only released to fix critical compatibility or performance issues. Update via LG Soundbar App
The most direct way to check for and install updates is using LG’s dedicated mobile application. LG NB4540 Product Support :Manuals, Warranty & More
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." lg soundbar nb4540 software update
Here is a story of how a standard software update can revive your home theatre experience. The Symphony Silenced
The living room was quiet—too quiet. When Elias sat down to watch his favorite sci-fi epic, the dialogue from his
soundbar sounded thin, and the wireless subwoofer kept losing its connection. Instead of an immersive cinematic experience, he was met with glitchy audio that pulled him out of the story.
Determined to fix it, Elias visited the official LG Electronics Product Support page to find a solution. He discovered that outdated firmware can cause performance lags and connection drops. The Digital Search
Elias decided to check for a software update. He knew there were two main paths:
The Mobile App Path: Using a smartphone to manage the system wirelessly.
The USB Path: Manually downloading files for a direct hardware update.
He started by downloading the official LG Soundbar App from the App Store. After connecting his phone via Bluetooth, he navigated to the "Software Update" section. He also checked the LG Support Help Library for step-by-step instructions on connecting to ThinQ for future automated updates. The Transformation
A notification popped up: “New Update Available.” With a quick tap, the download began. Elias watched as the soundbar's display flashed with progress indicators. After a final restart, the system was renewed. LG NB4540.DARELLK Product Support
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. To keep your LG NB4540 Soundbar performing at
: The display should show "UPDATE" or a percentage. It will reboot automatically when finished. Troubleshooting & Maintenance
Why Update the Software?
Updating the software on your LG Soundbar NB4540 can improve its performance, add new features, and fix any issues that may be present. It's recommended to keep your soundbar's software up to date to ensure you have the best possible experience.
Preparation
Before you start, make sure:
Method 1: Updating via USB
Method 2: Updating via Network
Verifying the Update
After updating, verify that the new software version is installed:
Troubleshooting
If you encounter any issues during the update process:
"LG Soundbar NB4540 Software Update
To ensure your LG Soundbar NB4540 is running with the latest features and improvements, follow these steps to check for and install a software update:
A: No. That message means your current version equals or exceeds the USB file’s version.
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.
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. Your soundbar is connected to the internet
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.
This report outlines the status, methods, and troubleshooting procedures for software updates on the LG NB4540 Soundbar. 1. Official Software Update Status
As of April 2026, the LG NB4540 is considered a legacy product. Official support pages across various regions (including LG Levant and LG South Africa) currently list no new software available for download.
Current Versioning: LG typically bundles minor bug fixes and performance improvements without detailed public release notes.
Availability: If an update is released, it is generally delivered via the mobile application rather than manual USB downloads. 2. Update Methods
There are two primary ways to check for and apply updates to this soundbar: Method A: LG Soundbar App (Recommended)
The most reliable method is using the dedicated smartphone application.
Installation: Download the LG Soundbar App from the Google Play Store or Apple App Store.
Connection: Ensure your soundbar is paired with your smartphone via Bluetooth. Check for Updates: Open the app and select your device (NB4540). Navigate to Settings (gear icon) -> Device Information.
Select Software Update to view the current version and check for pending updates. Method B: Manual USB Update
While rarely used for this model due to its age, manual updates can sometimes be performed if a file is provided by LG Support. Requirement: Use a USB drive formatted to FAT16 or FAT32.
Process: Place the firmware file in the root directory of the USB drive, insert it into the soundbar's USB port, and follow on-screen prompts (if applicable) or wait for the device to recognize the update. 3. Troubleshooting & Reset Procedures
If the soundbar experience performance issues or fails to update, a reset may be required. LG NB4540 Product Support :Manuals, Warranty & More
The tech support forums lit up. People swapped remotes, changed batteries, and even moved their routers, convinced there was interference. But the issue persisted.
The culprit turned out to be a software logic error regarding the remote sensor. The NB4540 was programmed to be highly receptive to IR (Infrared) signals. However, the initial firmware was too sensitive. It was misinterpreting ambient light, stray signals from other remotes, or even its own internal electronic noise as commands from a user.
The soundbar wasn't haunted; it was hallucinating.
USB → UPDATE → START → MAIN0%-100%).Update your LG NB4540 if:
Skip the update if: