* open corresponding section door on main panel
  * at about eye level, there will be a square black box, "DC Okay". There should be a green light.
  * if there is no green light, cycle power on the main panel for 10 minutes
  * after timer has expired, restore power to main panel
  * you may have to [[http://braindump.sbs/wiki/doku.php?id=production_hit_e-stop_and_now_machine_won_t_run|  reset the safety relay]]