Well, not much to say... I was attempting to delete pilot stored wpts, and suddenly the whole FMC froze, I can't click in, I can't ESC it, no keyboard, no control, nothing.
In fact, none of displays are reacting any more. Changing zoom on ND, does not change on the display. OIS does work though.
I guess the only fix will be to leave the flight and rebuild it from scratch.