A couple weeks back I moved every thing from my carbon core x4 quad over the my new Tarot 680 and added 2 motors and 2 esc's. I calibrated the 2 esc's and I have conductivity from the pcb board to each motor plug at the end of the esc on both the postive and negative pads. I connected the hexa to the dij assistant software and every thing checks out on the sliders and gps mounting. I power cycled the system several times on hopes of s change but nothing. And #1 motor is still the only motor that arms. I hope some one has some good suggestions for me.