Posting this here in case anyone else ever runs into this situation. If the hard drive interface board that is attached to the hard drive fails, in order to get data off that drive, if the data isnt trashed by failed writes to the platters, you will need to find an EXACT match to that drive to use a donor hard drives interface board. EXACT MATCH is not just same make/model, but the firmware has to be the same. If one was version 1.0A and the other is 1.0B its not likely going to work. Also you want the donor drives date code to be as close as possible to the drive that failed as for in addition to firmware changes during the manufacturing process other changes can happen to which even though the drives are the same make/model/ and firmware rev, it wont work because the manufacturer made a change of some sort that is not documented and the board just wont work.
Only time I got lucky swapping the Hard Drive Interface Board was when I had bought a group of SCSI drives and a system that had been running of off a single SCSI drive on a server 2000 setup crapped out and a co-worker added processes to it that he assumed were safe to be there and because RAID was not being used on that system, we had a situation where we had a single drive with data we needed off of it and it spun up, but was not detected by the Adaptec U160 controller. I looked at a good drive I had from the group that we had as a spare, and compared the boards and the Rev's were an exact match. I wasnt able to locate the firmware version, but was able to compare serial numbers and the serial numbers were very close ( within about 300 of each other ). I used my small torx set and carefully removed the bad board and good boards from the drives ( first marking the bad board with an X with a sharpie marker ) to not get confused as to which board is which and successfully moved the known good board over to this other drive. Booted the system up and whalla, the Adaptec controller was able to see the drive and the data we needed was in an area that was not corrupt. Quickly copied data over network to a safe location on a RAID 5 set and then moved this board back to the original drive it came from and tested it as a good working spare drive. Then saved the bad drive off to the side marked that the board is bad in case we ever needed to mix a platter/motor set with a different board again. Most people would have thrown the bad drive out or sent it back under warranty. I didnt want to send it back under warranty because I tampered with it to get my data back for the company and broke the seals on the torx screws, so it wouldnt be honored anyway for warranty since I tampered with it.
So just wanted to mention this in case someone came in to view this at some point with a similar issue. You can get your data back without sending it out to an expensive data recovery center, but you have to have exact drive for donor board, and it has to be manufactured around the same time ( serial numbers are a good indicator of this ), and firmware has to match between drives, and sometimes they are not labelled!