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Power modes
Quick start mode
This unit automatically enters quick start mode to save power in the following cases. During quick start mode, this unit operations cause the power to turn on.
During quick start mode, the status LED lights in dim blue or dim amber.
Ethernet
After around 20 minutes of no operation and no network access after playing music via Ethernet.
Wi-Fi
After around 20 minutes of no operation and no network access after playing music via Wi-Fi.
USB
After around 20 minutes of no operation and no network access after playing music from a USB flash drive.
Bluetooth
After the Bluetooth connection is disconnected and there is around 20 minutes of no operation and no network access after playing music via Bluetooth.
AUX IN
After around 20 minutes of no audio.
OPT IN
After around 20 minutes of no operation after optical device is put into standby.
HDMI IN
Play the HDMI device, such as a Blu-ray player, connected to this unit. Around 20 minutes after HDMI device and TV are put into standby.
HDMI OUT (eARC/ARC)
Connect this unit and the eARC/ARC compatible TV with HDMI cable and play TV. Around 20 minutes after TV is put into standby.
Deep Standby
The device also has the ability to automatically enter “Deep Standby” whenever the wired or wireless network connection is removed for more than 60 minutes in quick start mode.
The front panel LED will turn off during Deep Standby. To wake this unit from Deep Standby,
Press any button on the sound bar or the included remote control unit.
Input audio signal to Optical.
CEC (Consumer Electronics Control) command over HDMI/ARC
Use a TV remote control that has learned the operations of this unit with the remote control learning function to operate this unit. link
It may take around 40 seconds to wake up this unit from the deep standby.
You also push the 
button for 3 seconds, the device enters the Deep Standby.
Off
To completely turn off the power to the device you must remove the mains plug from the power outlet.