I recently upgraded my delta printer from a RAMPS board to a smoothieboard, successfully updated the firmware, and tweaked the config file. The SD card will mount and smoothie will connect to Repetier or Pronterface but won't respond to any gcode. I am worried because I had the 12V power reversed earlier; have I fried my board? Because the gcode doesn't work at all I have moved my ATX pwr on lead to an open gnd pin, but once I did that the 12v looked good.
LEDs look ok.
Any ideas would be appreciated.