A straight board usually won't work.
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.
http://www.onepcbsolution.com/seagate-barracuda-7200720011.html
http://www.hdd-parts.com/firmware-transfer.html
Otherwise, if you are not adept at soldering, your local TV/AV repair shop should be able to do it for you.
The following article should help identify the components:
http://hddscan.com/doc/HDD_from_inside.html
Can you describe the failure symptom?
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.