Grab a multimeter and measure your stepper drivers. Put the black pin of the meter on your negative input on the RAMPS shield (should be the right-most input on the green block if you followed the documentation on genesis.farmbot.io). Put the red pin of the meter on the screw of the stepper driver. Your multimeter should read at least 600 milliVolts. I believe they ship with default 600.
If you can’t get a reading, maybe your stepper drivers are fried? I’ve had that problem with one of them, and the motor was jittering at first, and later not moving at all. Perhaps all your stepper drivers are fried?