The second "BIOS" (3) is a "FETKEY". It is part of the -5V supply for the preamp. It is not a "BIOS", and it does not need to be swapped. Where did you see this disinformation?

Also, you don't need to transfer TVS diodes. The drive will run without them, albeit without overvoltage protection.

The typical result of an overvoltage from a 19V laptop adapter is a shorted 12V TVS diode and open circuited zero-ohm resistors.

Here is a similar PCB:
http://www.users.on.net/~fzabkar/HDD/ST ... 01_TVS.jpg

Here is your PCB:
Do you have a multimeter? If so, we could take some measurements of your original PCB. You don't need to return the "BIOS" to this PCB for these tests.