Possible the mks board. I plugged in a ramps/mega assembly from the clear prusa i3 and flashed with the ft5 v3 firmware and now I have all functionality. Didn't think it was going to be any of the hardware on the printer side but did it to make sure it wasn't anything I did on the wiring side. Functionally it's up and printing from cura w/ sd support as well.
Is there anything I can test on the mks board to see if it's bad?
I'm going to stick with the ramps/mega stack for a bit just to get back to printing but would like to use the mks board.
Love the size of this machine. I was getting all the pieces together to build one about this size before I heard of this one coming out.