No sound is produced.

① Is the power on? The POWER LED lights blue when the power is on. If the LED is off, set the main power switch on the main unit's rear panel to "ON", then press the power on/standby button on the controller or the main unit's rear panel.

② Is the input properly set? Press the input selector button to select the number for the input to which sound is being input.

③ Is the mute mode set? The input LED flashes when the mute mode is set. Press the MUTE button on the controller to cancel the mute mode.