Before normal work, plug the five speakers into the "AUDIO OUTPUT" slots of the back panel of the Subwoofer. The built-in cable length of front speaker L/R and center speaker are 13ft,  the rear speakers L/R is 39ft.

Make sure five speakers are plugged into the audio output socket of subwoofer and power "ON" Status. 

Press the "ST.BY" button before selecting the mode： Bluetooth (BT), HDMI-ARC (ARC), Optical (OPT), Coaxial (COA), DV,  FM, etc.