sims 4 screen keeps turning black

Have you tried updating your graphics drivers, turning off Origin in-game, playing in Windowed mode and clearing game cache?

Finding devices and updating drivers on your PC
https://help.ea.com/en-us/help/pc/finding-devices-and-updating-drivers/

Turn off Origin In-Game:
Open Origin, Select Origin > Application Settings > Origin In Game tab and click the on/off switch to disable Origin In Game. - This deactivates Origin In-Game, as it has been known to cause problems with games.

Restart the computer, to help the computer refresh itself, and try the the game again.

Start the game in Windowed mode:
In Origin - Games Library tab, right-click on Sims 4 and select Game Properties - In the Command Line Arguments, add the following text: -w and click Okay.

Playing The Sims 4 in windowed mode
https://help.ea.com/en-us/help/the-sims/the-sims-4/playing-the-sims-4-in-windowed-mode/

Also, you mentioned removing the mods folder, but did you clear the game cache and delete the localthumbcache.package from the Sims 4 folder to help with troubleshooting.

How to Delete Cache Files
https://sims4.crinrict.com/en/2014/09/delete-cache-files/

If none of the above help and you would like further help, please share your computer's information with us. https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/

You can attach the text file to your post or reply directly. (To attach a file click the browse button just above the Preview button, at the bottom of the message box.)

With this information we can see if there's any hardware or driver issues.