Could be that the wire of the PINDA is just to be broken (only the "last" string of the cable makes poor contact). And that this first occurs on the 9th point. Place the printhead on that 9th point, place a peace of metal under the pinda, so that the PINDA recognizes the metal (PINDA led is on), then move the cable to see if the led of the PINDA goes out and on. If that's the case replace the cable (or replace the PINDA).
Europe, Holland, Apeldoorn