2. Try changing the mobile phone wallpaper to see if the screen color is back to normal.
3, check the system settings
If the screen still changes color after restarting the phone, it is not the normal color, check the relevant color settings of the system. Find the settings on the mobile phone desktop, enter the auxiliary function, if there is a category, select Visual, find the negative color in Visual, and see if this item is checked. Under normal circumstances, it should not be checked.
The color of the mobile phone screen is composed of three primary colors: red, green and blue, which is a positive color. Negative color is based on positive color, which filters white light and is usually used for printing. Check whether the negative color function is turned on, turn it off and then restart the phone check.
4. Display flat cable
The display line is the video signal transmission line between the display IC of the motherboard and the display screen. If the display line is welded or loosened, it will also lead to discoloration or vertical lines on the screen of the mobile phone.
5. Back up data (contacts, text messages, photos, etc. ) and restore the factory settings.
6. The problem still exists. It is recommended to take the mobile phone to the local mobile phone after-sales service center for testing.