11PMA-710AE2.4.3. The power turned on, but a sound does not output normally. (Single channel)Power indicator LED is lit normally (green ororange). Check each connector.Is the fuse (F901) normal?Check the voltage of eachdepartment.Check the operation of theswitching relay, switching ICand speaker relay.Check the Signal line.Power indicator LED is lit normally (green ororange). Check each connector.Check the voltage of eachdepartment.Check the operation of theswitching relay, switching ICand speaker relay.Check the Signal line.