You will need to transfer the 8-pin serial flash memory chip from patient to donor. This chip stores unique, drive specific "adaptive" information. Some board suppliers include a firmware transfer or ROM transfer service for US$10 - $20.
If you upload a detailed photo, one of us may be able to help you repair your board. Many times the problem is only a shorted diode, in which case it can simply be removed.
Otherwise, be aware that the 7200.11 models are affected by a BSY firmware bug. In such cases Seagate offers free data recovery. Alternatively, there is an easy DIY fix. The symptom is that the drive spins up but is not detected. Sometimes a drive will report 0 LBAs.
In most cases, you should exchange the BIOS chip before you swap hard drive PCB. Finding a matching pcb you can refer to this site: HDD Zone , there is a useful article named: "how to find a matching pcb".
@flypc, I don't see anywhere on your web site where you offer a $10 firmware transfer. You do however warn the customer that "you should move your original PCB's BIOS to the replacement circuit board to let the HDD be recognized", so ISTM that PCB compatibility is seen as the customer's responsibility. Still, that's better than most suppliers will do.
Instead it implies that merely checking the "board number" is sufficient.
As for whether I am affiliated with any supplier, clearly that's not the case. In fact I have recommended three different suppliers in this very thread. I would even consider making people aware of your business, if you were to explain your services clearly and unambiguously on your web site.
You need to check the 2 PCB's board number is same or not? The number is is printed on the PCB's back side (the side without chips). If the 2 PCB has the same board number, also need to be changed BIOS.