Not loading the game after pressing play

When I launch minecraft at first everything will load normally as it should, but after I pressed play i firstly get the mojang logo as it should, but after that I will get a black screen or a half loaded not moving screen (the screen where I can choose single player, multiplayer).

I already tried to replace the .jar file with a new one, but this bug doesn't get resolved that way sadly enough. That is the reason why I am reporting this now.