So I had a 2tb Seagate hdd stop and could not be recognized by disk management or even BIOS. Wanting to try and retrieve data off of this still, I went ahead and RMA'd the drive and opted to get the replacement drive first. The new drive is exactly the same as the old drive except that it runs cc35 versus cc95 as on the old drive. Thought I could simply switch out the hdd's controller board from the new to the old and at least for a bit, be able to retrieve data. That said, the old drive when plugged in would spin and spin, but again, could not be seen (even by BIOS) even as it spun. One faint click at the beginning and then just spinning. Now with the new controller board on the old drive, it does about 1-2 dozen clicks as it spins, but then the clicks stop and it stops spinning. This time, I can see a new drive (only about 4gb's in size), but can never really access it. With all of this said, anyone have further ideas or possibly know what is going on? Anything further I can do? Any further input for help and thoughts is greatly appreciated. Thanks much.