My father and I recently just built a RoStock Max V3 printer from SeeMeCNC. We finished it and were very excited to power it up and get it going. We checked the connections and plugged it in, and the controller didn't turn on. I watched a video suggesting that a 5 amp ceramic fuse had been shorted, so we ordered some more and replaced them. Still nothing. The extruder lights are on, the motherboard is showing a red and green light, all the fans turn on, power supply light is on. It seems that everything EXCEPT the controller is working. Can someone help me out with this?