Do not turn off the power while "UPDATE" is on the screen. This can brick your soundbar.
: Fixes audio cutting out during high-action scenes. lg soundbar nb4540 software update
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: Do not turn off the power while "UPDATE" is on the screen
: While newer LG soundbars use the LG ThinQ app or LG Soundbar app for wireless updates, the the Without these updates
Without these updates, your $400 soundbar may feel outdated and unreliable.
Here is where the story gets interesting.