Electronic failures in the hard disk are often termed as PCB failure. Every hard disk has a PCB that is usually green or blue in color. Usually, the hard disk PCB is Multi-Layered Single Side PCB. There are multiple layers of copper wire tracks, and all the components are fitted on the same side only. Some companies like Toshiba and Hitachi have multi-layered and multi-sided PCB. In their hard disks, the electronic components are fixed on both sides of the PCB. In this session of Electronic Failure Data Recovery Training, we will discuss the PCB structure of the hard disk. You will learn about the PCB in the hard disk, its structure, the electronic components installed on it, and the role of these components.