My WD Spins for 30 Seconds and Stops

WD Internal Drives Desktop & Mobile Drives
2

If this is your board …

http://pcb-hdd.com/images/WD10EARS-00MVWB0%202060-771698-002%20REV%20A%20PCB.JPG

… then you need to transfer the 8-pin chip at U12, or its contents, from patient to donor. This chip stores unique, drive specific “adaptive” information.

What was actually wrong with the original board?

BTW, the following PCB suppliers include a free transfer service:

http://www.onepcbsolution.com/
http://www.hdd-parts.com/