I am having an issue with the MIPI7 LCD with my YYT x1. There are faint vertical lines on the screen which aren’t normally apparent, but you can see them when there is a solid color on the screen. Also, the touch functionality of the screen does not work even after installing the drivers and restarting.
You can first reinstall the system and then update the BIOS. If the problem still persists, contact the store sales representative to handle the hardware replacement
If you need to install the driver yourself, you need to install all the drivers in the driver package.