This is the control system for the freight elevator at work in a valid running state (idle, leveled at floor, doors open, ready to serve). I forgot to take a picture of its Fnord state but it looks much different. From the outside, the fnorded state is simply that the doors fly open with an unusually loud bang, leaving you with a six inch or so step up or down to the floor, followed by the elevator no longer responding in any way other than opening or closing the doors.
Update: I forgot, I actually have a video of it… BEHOLD! YOU CAN SEE THE FNORDS!
Many things can Fnord it. To unfnord it, one usually just cycles the power off for a minute then back on, and all is well. This time the Fnord levels were just too great and it needed intervention if the janitor was to be able to get their cart out of there. Read more “Digital Illogic, or The Fnord Elevator!”