Samsung HDD PCB HD161GJ/B

Q: I have Samsung HDD
* model : HD161GJ/B
* LBA 312,581,808
* 160GB
* SEC-HD161GJ(B)
So, which is exactly HDD PCB that will be compatible with it ?

A: Please advise the board number which is etched on the PCB, begin with BF41-

Q: That mean models no, 
HD161GJ,  HD251HJ and HD321HJ have the same PCB HDD if the ship no is 
BF41-00204B  ?

A: https://www.hddzone.com/hd161gj-samsung-pcb-bf4100204b-p-1910.html is your donor PCB.
This PCB’s BIOS is integrated on the Main Controller IC. You should exchange the Main Controller IC to let the HDD be recognized. Move the Main Controller IC(the biggest chip on the board) is a complex job which need you have certain technique. Some electronics repair shop can do it.