I've got the system up and running. I'm using a Raspberry Pi with Octoprint to manage the printer. This way I don't have to keep my laptop connected all the time.
However, the Raspberry Pi is meant to be powered on all the time, and that leaves the X3 powered on all the time. That doesn't seem right. So, I switched the jumper to internal power. The board does now go on and off with the power supply, but nothing else does. The fans don't run, and the steppers won't move. When I put the jumper back to USB, everything returned to normal.
Any ideas what's going on?