This is the base page of the section of Data Recovery Companies.
The content you are looking for can be found via the navigation to your left ←. some of these folder index pages have content, but most like this one don't.
I just found out that you can't just change a board on a hard drive to get it working, that can damage the drive according to wdc.com, because firmware updates are made quite often.
Also, if there is clicking or screeching, or it won't spin up (stiction), you want to at least use a data recovery shop with a clean room.
I just found out there are data recovery shops recommended by the hard drive companies.