it took me a while to find the proper configuration of the fuses, but code works fine.

At the moment it works on a TEST BOARD, but not on the pcb board. Maybe i have done a mistake on the drawing and i create an overflow or a bad EMF that causes a problem to the resonator.

What im thinking of is to use the internal OSC of the PIC16F84A, 4Mhz, instead of the external 4Mhz resonator. In that way i will also eliminate a component and i will check whether that was the problem.