Yesterday my Anet stopped doing prints, so i checked all the extruder block and i saw that the Extruder Motor was not going up and down also while no print were printing, trough the Extruder Position Change in the Menu.

First of all i tried the cable of the extruder motor on the Y motor and i noticed that the motor was going well. So i excluded the cable.

Then i tried to connect the extruder motor to any other motor connect and it worked perfectly. The cable is ok, the motor is ok. The connector on the motherboard is problem. Can i solve the problem with some electronic skills or i need to change the MB?