Thanks for the info. I hooked up my power supply, similar to the one shown. and the board and lcd lit for a quick second. then out.. I measured the output of the 12vdc p.s. 14 volts... wtf.... hooked up thru usb, and board lit up so its still working. I then verified 12v from the printers power supply with a meter and connected to the board. no lights.
that spec you sent 14vdc shouldnt have affected the board. I'm thinking this is a chinesium knock off and not a hardier board which may be the issue. I'll probably order another board and pull 12vdc from the printer power supply which I should have done from the get go.