Why does SWBF2 crash my PC?

I have a problem. Whenever I start Starwars Battlefront 2 on my laptop (a gaming laptop) my PC crashes EVERY TIME! And it's always the same standstill code. Video_Scheduler_internal_error

I googled once and it said it was on the monitor or something. I play with an external monitor but it works fine. What should I do. (Sometimes the game goes, but only when the monitor is not connected)

Well you found the mistake.

Then your monitor is not suitable or your monitor output is not compliant with the game.

Try a different external monitor as a cross-check.