Logic boards are circuit boards that allow all components to communicate with each other. If one component fails, the entire logic board usually fails. Each component has a unique function to perform. With the naked eye, you can't see much. A microscope is needed to see the components in order to diagnose failures. Replacing defective components is not as easy as it sounds, because you first need to know which IC or filter is defective. To find the defective part, the logic board schematics from the manufacturer's specifications are used. Once the defective chip has been identified, the next step is to remove the defective chip and solder the new chip in its place. Only a qualified micro-soldering specialist should do this work. At Place du Mac, we repair all Apple logic boards.