Touch screen icons are not fully displayed
Usually the firmware is not updated successfully.
Try to update the firmware again. Be sure to format the SD card before updating the firmware.
https://www.youtube.com/watch?v=yI5gPk5TirU
The touch screen is distorted, with horizontal or vertical lines appearing; the touch screen displays a white background or a black background (not completely black)
Usually the touch screen is damaged or the touch screen cable is loose. Sometimes it may also be a firmware problem.
Note: The touch screen display with white background or black background (not completely black) is sometimes caused by motherboard problems. If replugging and unplugging the screen cable does not work, you can try to use Repetier to connect via USB cable. If you cannot connect, it is a motherboard problem and needs to be replaced. motherboard