If you get the data sheet of the LCD, it’s easy to find out its model number. You also can the information of resolution ratio, voltage, interface type and interface definition of logic board, interface definition of LCD inverter, etc.
If you have no data sheet, try to find the model on the paper stuck on the back of LCD. You need to take the shell apart. There are many models and different identifications from various brands. Some people think that it’s the number on the paper of the back of TV display. Absolutely not. Take the shell apart and check the back side of the display.
For some displays, it’s marked on the back and usually shows in format of letters & digits, such as Samsung LTN141P01. As for interface, there’s mark on main board and it consists of power pin, signal pin and ground connection pin.