Answer to "Thoughts on data recovery through logic board replacement?"Do not simply change your PCB, what about the ROM? This action will not help you. Is the drive spinning, then shutting down? Or is it repeatedly clicking? Please give a better diagnosis if you can. BTW if the HDD is not detected by the system it will be fault not fixable DIY sorry, take it to a local DR pro for a correct analysis and recovery.
Answer to "How to transfer data from a damaged external hard drive?"Please do not use any software to try and recover your data, you will seriously compound the recovery. The HDD will have suffered from a physical issue and in require clean room work, the HSA will have come into direct contact with the disk surface and probably require exchanging, given that this a WD hard drive you will not the micro-jogs or other details, not least have a clean room / bench and skills to change the heads, take it to a pro DR company.
Answer to "Recover Data from Internal Hard Disc"What exactly was the failure? dead, not spinning, clicking, not detected by BIOS or OS? If the HDD has any of the above issues, you have a fault which you will not be able to fix, it will not be a DIY job I am afraid. Please do not change the PCB, this will not work, also do not open the hard drive. Please reply.