There are many reasons for the black-and-white display of the mobile phone screen, which may be caused by the user's own incorrect settings or the failure of the mobile phone system or the screen itself. The specific reasons and solutions are as follows:

Reading mode or color filter

It may be that the mobile phone has turned on the reading mode (such as adding a mobile phone) or the color filter (such as an Apple mobile phone), which can be solved by turning off the corresponding options in the system settings.

system malfunction

The color display may be incorrect due to the malfunction of the mobile phone system. You can try to upgrade the system version of the mobile phone or restore the factory settings of the mobile phone.

Screen failure

It may be that the screen display of the mobile phone is faulty or the connection between the screen and the motherboard is abnormal, so it is necessary to take the mobile phone to the brand maintenance center to check and replace the corresponding faulty parts.

Color inversion

Reverse color will cause the phone to turn black in vain. You can set it in settings, color inversion or gray mode. There is also a gray mode in the settings to save electricity and protect your eyes.

Cold and warm color adjustment

You can adjust the color mode in cool and warm tones. But not as obvious as the black-and-white inversion. Eye protection mode can also cause the screen to darken. But it won't cause the screen to turn black and white.