hello there ive managed to cure the random signals on my new midi-box64 but now ive got a problem with some of the din inputs. half are working and half are not, the 4 chips on the first board work and the 4 chips on the second board dont. ive swapped chips from one board to the other all the chips work. ive checked connections and wires from buttons to board all okay ive checked connection from first din to the second din board, its okay ive checked