GNS 530 Screen will not Power On

[GYAF]

I have submitted a ticket to FSB, but looking for any additional guidance. The device in question has all cables in the back. I have confirmed that the power supply is delivering 12v DC, the USB connection is recognized in the FSB launcher as a GNS 530 and that LED mode can be enabled (based on button push and corresponding lights on the side of the device). I received this device second hand so I am unsure if this is damage, a defect, or improper installation. Any advice would be appreciated