What should I do if the LCD display module has a broken screen?

The LCD display module is a display that uses liquid crystal as the material. It is a component that installs liquid crystal display equipment, connectors, integrated circuits, PCB circuit boards, backlight sources, and structural components together. What should I do if the LCD display module has a problem with the screen?

1: Check if the connection between the LCD module and the motherboard interface is loose. It is a common phenomenon that poor contact causes "clutter" and "nozzle" shaped screens.

2: Check whether the main board and LCD module appear under the above conditions, for example: how much volts is the strong electromagnetic interference?

3: Check whether the motherboard and LCD module interfaces are connected reversely, and whether the order is consistent with the order of the drawing.

4: Ask the supplier for help.