Right-click the downloaded LG firmware ZIP file and select .
:
Locate the downloaded ZIP file on your computer and extract its contents.
Simultaneously, press and hold the button on your remote control.
Updating the typically involves using a specialized mobile application or a manual USB process if a specific firmware file is provided by support. While current support pages for the NB4540 often state that "No softwares available for download" , LG provides universal methods for their legacy audio equipment. Method 1: Using the LG Soundbar App (Recommended) lg soundbar nb4540 software update
Fixes sudden power-offs, unresponsive volume controls, and input switching glitches. Prerequisites Before Updating
: Ensures the soundbar works seamlessly with newer 2026 LG OLED and QNED TVs. Method 1: Update via the LG Soundbar App (Recommended)
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Before proceeding, please note the following critical points: Right-click the downloaded LG firmware ZIP file and select
Owners started reporting a "Phantom Hand."
Fine-tunes the internal digital signal processor (DSP) for clearer dialogue and richer bass.
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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 Updating the typically involves using a specialized mobile
The easiest and safest way to flash new firmware to your soundbar is through your smartphone.
Perform a factory reset only after an update if you experience erratic behavior (e.g., remote button lag). Reset procedure: Press and hold the (square icon) on the soundbar unit for 5 seconds.
A firmware update acts as an operating system upgrade for your soundbar. Skipping updates can lead to performance degradation over time, especially when connecting newer streaming devices or TVs. Updating your software resolves several common issues:
: If the soundbar behaves erratically after an update, perform a reset by holding the Volume Down button on the unit and the Sound Effect button on the remote simultaneously for 5–10 seconds.
General performance tweaks to prevent audio dropouts. Method 1: Using the LG Soundbar App (Recommended)