A: No. The NB4540 does not have built-in Wi-Fi – only Bluetooth and wired connections. USB is the only reliable method.
Keep holding it until numbers appear on the soundbar display panel. This number represents your current firmware version. lg soundbar nb4540 software update
: You can still download the original Owner's Manual and Quick Setup Guide from the LG New Zealand or LG South Africa support sites if yours is lost. lg soundbar nb4540 software update
The display will scroll the current version (e.g., NB 1.23). lg soundbar nb4540 software update
Do not turn off the power or remove the USB drive during this process. This can permanently damage the soundbar.