My Ender 3D with BlTouch And Marlin 2.0.1 firmware was working flawless for 3 months.
Yesterday, without any hardware or software change, it started acting weird: on Auto-Home command it first makes expected moves (home X and Y), then moves to the center of the bed and then instead of going down to bed, it rises all the way up and then writes a message about End Stop. This of course happens also on "start print", "level bed", etc.
Before the Auto Home command, I can operate the Z axis normally, after it, the printer does not allow movement down.
Do you have any ideas, what might have gone wrong?