Make sure the power cord is connected to both the AC mains connector and an AC wall outlet.
Try to change for another power cord.
Check the AC mains voltage indication on the back of the unit and see if it corresponds to your local power voltage.
No Sound or Low Output
Examine all cables to ensure a solid connection between the POLARIS and associated components.
If you are using the USB port, make sure the playback software’s volume is set to an audible level and not muted.
Make sure all associated components are powered on.
Make sure the associated components connected to the selected input has an audible output signal.
Try rebooting the POLARIS (power off the POLARIS, then power on again).
Distorted or Partial Sound
Check the output cables between the POLARIS and the preamplifiers / power amplifiers / active loudspeakers, make sure all are well connected.
Make sure that all speaker connections are tight and that no stray strands of wire shorting exist within the speaker terminals.
Try rebooting the POLARIS (power off the POLARIS, then power on again).
Noise / Hum
Check the output cables between the POLARIS and associated components, make sure all connections are well done.
Make sure the output cables between the POLARIS and the power amplifiers are not settled near any AC cables, power transformers, or other EMI inducing devices.
It may be helpful to plug all associated components into the same AC circuit in order to share a common ground.
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