Problema di connessione BSI

Good afternoon, consult to see if someone can help me, a partner II arrived that did not start, had the front lights on, and the board ignites all the lights and does not work, the damaged BSI was detected and changed, another original model was bought, it was made learning and the telecom BSI, which would not be a physical connection problem, why when I enter with the scanner and actuator of the board acts perfectly, can anyone help me with this? Ti ringrazierei molto, grazie mille.