When the LG NB4540 launched, it was a sleek, minimalist beauty. It was designed to sit flush against a wall, featuring a unique "Woofer bolt" design. But shortly after customers set it up, a strange phenomenon began to occur.
Owners started reporting a "Phantom Hand."
Imagine this: You are lying in bed, dead silent, watching a movie with the volume low. Suddenly, without touching the remote, the volume icon appears on your TV screen. The numbers creep upward. 10... 15... 20... The sound blares, waking up the whole house. You grab the remote to turn it down, but the soundbar fights you, raising the volume right back up.
Some users reported the soundbar changing inputs randomly in the middle of a climax, switching from the intense silence of a thriller to a blaring commercial on the radio input.
It was haunted.
If you don’t have a USB drive, the LG Audio Channel app (available on Google Play and Apple App Store) can push updates via Bluetooth. However, this method is slower and prone to interruptions.
Important Warning: Do not use this method if your soundbar frequently disconnects from Bluetooth. A failed app update can brick the device.
Steps:
Why not first choice? The USB method bypasses Bluetooth instability and works even if your soundbar’s Bluetooth chip is faulty. lg soundbar nb4540 software update
Via the Soundbar's Settings:
This is the most reliable method for the NB4540 if the automatic update is not available or if you are resetting the device.
The NB4540 is picky about USB drives. Follow these rules strictly:
How to format on Windows:
On Mac:
Crucial Warning: Do not use updates from third-party driver sites. Only use LG’s official servers.
The LG Audio Remote (or LG Wi-Fi Speaker) app used to support OTA updates, but LG has since deprecated this for legacy models like the NB4540. Many users report the app says “No update available” even when a USB update exists. Do not rely on the app. Always use the USB method.