The problem is not solved yet
The battery was not charging, the green led sometimes was on, sometimes off. With the new magsafe2 board the battery begins to charge, the led changes from green to orange. But there is one problem. When the computer is turned on, the led turns off and the computer remains working maintained only by the battery. It isn't possible to charge the battery and use the notebook at same time. If the computer is turned off, the battery is charged.
I installed the new board following the instructions, without problem.
No. I sent the notebook to a technician, but he doesn't know yet what happened. If someone can help, would be great.