External USB Enclosure Fried My Drives

I had all my data backed up on 2 hard drives.
I was switching from a desktop to notebook/desktop replacement.
I attached the drives to an external USB enclosure.
Both were not recognized as USB by WIN XP.
I then tried the drives in a working computer and both cannot be seen by the BIOS.
I am pretty sure the USB enclosure/cable or its power supply fried the drives IDE.
I think that replacing the drive electronics board will get my drives working so that I can rettive my data.