: You can find original setup guides and technical documentation on the LG NB4540 Support Page If you are experiencing a specific issue like Bluetooth dropping no sound from the subwoofer
If you prefer a manual method or do not have access to the app, you can use a USB flash drive. LG NB4540 Product Support :Manuals, Warranty & More
Enhances wireless pairing with smartphones, tablets, and newer smart TVs.
: Turn on your soundbar and enable Bluetooth. Pair your smartphone to the NB4540. Check for Updates : Open the app and select your connected soundbar. Scroll down to the Software Update section. lg soundbar nb4540 software update
Right-click the downloaded LG firmware ZIP file and select .
Switch the function/input mode to using the remote control or the source button on the soundbar.
The Phantom Hand vanished. The volume stayed where it was set. The inputs stopped switching on their own. : You can find original setup guides and
The most direct way to check for and install updates is using LG’s dedicated mobile application. LG NB4540 Product Support :Manuals, Warranty & More
Fixes intermittent audio dropouts when connected via HDMI Audio Return Channel (ARC).
Type NB4540 into the search bar to locate the specific product support page. Pair your smartphone to the NB4540
Needed to download, unzip, and transfer the firmware files.
If you're having trouble finding the specific firmware, I can check the official LG support site to see if a file is still available for the Go to product viewer dialog for this item.
Ensure the update file is in the main directory (root) of the USB drive and not hidden inside a sub-folder. The Subwoofer Disconnected After the Update