Use the top post in this forum for the usuals. Hint: The lost and found post.
If that fails, you are left to call up the folks at:
I swapped the pcb board on crashed hard drive (WD200EB-00CSF0)with one I purchased off of the internet. The drive now spins and shows up in the device manager but does not show under my computer. OS Windows 2000 Pro. I would hope there is a way to recover my lost files.