Cinght520

Sleep mode turns off the screen.Or simply close the screen lid of your notebook.

It should be BIOS intervention, you use the built-in Mydell cooling to change the performance, and then turn off the screen to observe again, otherwise it is a software problem....

/ The software of this interface is usually brought with the machine when it leaves the factory.

https://apps.microsoft.com/detail/9pn7t3jfprz6?gl=CN&hl=zh-cn&rtc=1Try this Microsoft Store version. https://www.dell.com/support/kbdoc/zh-cn/000200388/%e5%a6%82%e4%bd%95%e4%b8%8b%e8%bd%bd%e5%92%8c%e5%ae%89%e8%a3%85-my-dell-%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f?lang=zh Dell's tutorial?