What is the meaning of the different LED colours, on my SoundBox HD?

Each LED light, on your SoundBox HD device, represents a different mode.

Modes with only one LED light on:

Green > Device is ON

Red > Device is OFF

Blinking Blue > Bluetooth pairing mode

Yellow > Playing sound from another device (connected via HDMI ARC mode)

No LED - Device is in "Deep Sleep Mode"

Green or Orange > Software upgrade in progress

Modes with several LED lights on:

Green & Blue > The TV screen is on and is connected to a device via Bluetooth

Red & Blue > The TV screen is off and is connected to a device via Bluetooth

Green & Orange > The TV screen is on and is connected to a device via an 'AUX' cable

Red & Orange > The TV screen is off and is connected to a device via an 'AUX' cable