Re: I am having a white screen while playing my sims 4 game

@hypno-fr0g  It's not a good idea to put a computer to sleep, whether formally or by closing a laptop lid, while it's running a graphically-demanding application.  By "not a good idea" I mean both that you can run into problems like this and that even if you don't, performance may be significantly affected.  So if you want to put your laptop to sleep, quit Sims 4 first.  If startup times are too long for your taste, try suppressing the mods and cc pop-up at the Main Menu—this decreases load times by a significant margin.

For the issue in fullscreen mode, try using windowed fullscreen instead.

If that doesn't help, try setting the system and user DPI scalings to 96 (100%).  Even if you don't want to use your computer like this overall, it's a useful test.

https://www.tenforums.com/tutorials/5990-change-dpi-scaling-level-displays-windows-10-a.html