To change the Bios Setting you need an USB⌨️keyboard. Here is the keyboard shortcut list 👉How to enter the Bios and Setup the boot option .

Boot the device and ⌨️press Delete key enter the Bios.

➡️ Chipset

➡️ North Bridge

➡️ Backlight Control –> PWM Inverted

⌨️Press F10 ➡️ Yes, Save & Exit. BIOS LVDS Backlight Inverted adjust. If the Windows system brightness controls are reversed, change this option may fixed it.