I have a hard-disk that is physically dysfunctional. Unfortunately, I have to perform data-recovery as there was no backup of the hard-disk. My hope is that it's the circuit-board on the hard-disk so perhaps I can easily replace it. The question I have is how can I be 100% sure that the problem is the circuit-board? What are the risks with replacing the circuit-board without swapping the board in a clean-room? Do you have recommendations as to where I could buy a circuit-board for a hard-disk? It is an IBM ThinkPad Laptop. There is no clicking whatsoever. The hard-disk LED lights-up for about 2-seconds during the boot process and then the light vanishes. I mounted the disk to a hardware enclosure and when clicking on the disk it asked to format the disk. My thought is that if it wasn't the circuit-board, there would be power and possibly some clicking if it were another component of the disk. Please let me know your thoughts!