Hi
Is it possible to use the laptops Integrated gpu instead of the dedicated one as if you can try that you can tell if it’s a gpu related issue rather than a display issue(if it does it on one gpu but not another you will know what one has the issue buts that quite unlikely)
At the moment it’s looking like a display issue but we need to confirm that by trying the above
Hopefully this helps
Any questions please ask
Thanks:-)