The computer screen may turn black and white because # gray mode is turned on. Gray mode can help some users reduce the color stimulation on the screen and help to reduce eye fatigue. To restore the color display, you can follow the following steps:

Windows system

In Windows system: Press the "Windows" key on the keyboard to open the start menu. Enter "Color Filter" or "Gray Mode" in the search box, and then select the corresponding option. Turn off the "color filter" or "gray mode" switch to restore color display.

MacOS system

In macOS system: Click the Apple icon in the upper left corner to open the system menu. Select System Preferences. Click "Accessibility". In the list on the left, select Show. In the window on the right, find and close the "Use Grayscale" option to restore the color display.

Other reasons

If your computer screen turns black and white for other reasons, it may involve graphics card settings, driver problems and so on. , you can try to restart the computer or check the relevant options in the system settings to solve the problem. If the problem still exists, it is recommended that you contact computer technical support or professionals for help.