ST60 Wind Display

Purchased this unit used (in Box) a couple of years ago, it was opened but never installed. When I finally installed the control head to my network via seatalk, as well as connecting all the cables as per the manual, the unit display is making a loud buzzing noise. None of the keys work nor do the back lights, the wind direction needle does not move and the wind speed indicator is blank. I am having a hard time finding a replacement display, if anyone has any suggestions as to why this brand new unit never installed would buzz and not operate out of the box it would be greatly appreciated.

could this be a 12 volt power supply issue?

thanks in advance