Since the drive was not spinning up at all, and now after swapping PCB it is spinning up defenitly indicates that is was a problem with the controller.
But, now it would have been nice if the whole recovery process would have been that easy
What did you match up, when searching for a PCB to use from ebay?
The Hardware is fine, but you have a problem with the Firmware.
This could be two things.
1) In addition to the PCB, your Firmware on the drive itself also got currupted and needs to be fixed (less common).
2) You did not make sure that the Firmware revision of the PCB's match.
(common mistake).