LCD controller boards A LCD controller boards are a piece in an electrical circuit that interfaces with a peripheral object to connect the computer to it. The connection may be with some other computer parts like the memory controller, with an external device such as a mouse that acts as a peripheral controller for an operation of the original device. The LCD controller boards are also known as the Analog/Digital (A/D) board. https://www.displayslcd.com/product_displaycontrolboard.html