Game loads but dose not display.

So I've been searching for the last two weeks and cant find my problem. I start a game like normal it it will load i can hear the sounds and such but either dose not display or shows a tiny bar at the top of the screen on my Nvidia Geforce GTX 970m. But it will display fine on my internal graphics card. I've uninstalled and everything for the graphics card and reinstalled it and the games. its mostly steam games. That I've tried all but Mechwarrior Online, and that one the intro dose not load but the game will after. And Guild Wars 2 loads fine but that's an older game. Any suggestions?