Screen is black and I have strange problems

Good evening people,

I have a problem with my macbook pro retina. Screen doesnt show up. It happened suddenly. So I thought it relates with motherboard. I changed motherboard but problem still continue. When I plug in charger fans start work suddenly. I even didnt click power button. When I didnt plug in charger, Its not working. When I connected to battery without charger, it doesnt work. And also When I plug in charger and not connect to battery It doesnt work too. I dont know what kind of problem I have. Please I´m waiting suggestions and solves.