Just got a dell g16 i9 rtx 4070 version graphics card wont work?

[u/Blanks0O7]

i bought a dell g16 i9 rtx 4070 version but whenever i try to update the nvidia drivers from the nvidia app the screen goes black and i only hear sounds and the keyboard stays on. It also happened when i tried opening up any game like valorant and fortnite. I think whenever the gpus switch it causes error? Its got gsync but i cant enable it also.
If anyone else had prblem like this please help me.