Check the power source and if you can get behind the switch, check for continuity. Make sure that the device is properly connected to a power source and that the outlet is functioning. You can test the outlet by plugging in another device.
Check the power cable and make sure that the power cable is properly connected to the unit and the power source. Also, check for any damage or fraying on the cable.
Check the power switch to ensure that the power switch is turned on. It is possible that it might have been turned off accidentally.
Try resetting the device by disconnecting it from the power source, waiting for a few minutes, and then plugging it back in.
If all those fail, you will need to take to an audio engineer.
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