I'm currently transferring from my laptop to my MSI screen with an HDMI cable, but unfortunately the quality on the screen is very pixelated.
PS: I've already tried other HDMI cables
Maybe your laptop doesn't have the power to do both, what hardware does your laptop have?
Where is that
Vlt. Does that help:
https://www.computerhilfen.de/hilfen-4-340280-0.html