I’m doing a DIY build of a 1.2 Genesis, and all but the final wiring and electronics is complete. I have piggy-backed the RAMPS onto the Arduino, but all I get on power-up is the green light flashes twice, then nothing. The OS on the Pi seems to communicate all ok, and the Arduino runs fine (green light) whether the RAMPS is attached or not - any ideas as to what I’m missing please? It feels like a jumper issue or something.
Thanks for any help given.