Impossible to launch W-I on G9 49"

Hello ive got a big 49" monitor (G9 Samsung) and 27", when i launch Warcraft I Remastered, my 49" is completely broken, go to sleep, and the game is lauching to right monitor (the 27). How can i put it on my 49" ? And why my 49" is going off/crazy when i launch the game ?