I posted this to multiple tech support sub reddits and got no reply, maybe one of you could help?

I have strange issue with my Windows 11 ASUS strix g15 advantage edition laptop. I have it for a couple years and I've replaced the network card (because MediaTech) and added a second SSD. Within the last couple months or so I've had screen issues, it'll go black if bumped or sometimes if the lid is closed. I've replaced the screen and still have the same issues, when the scene goes black sometimes it'll go back if I bump it again other times the only way I can bring it back is by opening the PC up and unplugging the screen and plugging it back in. When this happens I can use an external screen but the built in one doesn't work. For some reason the most recent time this happened and I used the external monitor and I tried to play a game it seemed to run off the IGPU rather than the 6800M I don't think that happened before. games seemed to run fine when the internal screen was working. I am a decently techy person and am completely out of ideas, thank you!