Acquire a Video Control Board for your model's LCD.

Check out this guide, which explains how to do this for an iMac! The steps are essentially the same on a laptop: Simply disassemble the Screen Assembly**, look at the model number on the back of the LCD, then purchase the correct Video Control Board online.

** This guide covers how to take apart the Display using a heat gun, so you can safely remove the glass & LCD from the aluminum back-panel.

Video Control Boards should consist of 3 circuit boards: (1) The main control board; (2) the inverter board; (3) the menu button board.