How can I tell if a Seagate logic board will be compatible with my dead 120GB Barracuda ATA V HD?

I have found one that:
Capacity is the same
Model # is the same
S/N is DIFFERENT (of course)
P/N is the same
HDA P/N is DIFFERENT
Config is the same
Firmware is the same
Date Code is DIFFERENT
Site Code is the same.

Do any of the above differences make it incompatible with my drive?
If any other information is required, please ask.
Thank you for your time.

It's worth a shot IMHO

But check TVS's first (search this forum for info on this)

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I should not have referred to my HD as "dead", sorry.

I replaced the drive because it would cause the computer to restart partway into the boot sequence (every time, and as far as I could tell, at the same point). With the bad hard drive removed, the computer booted fine. I then (after booting) used an external device to attach the bad HD through a USB cable (a really handy device if you have to examine alot of HD's). It is recognized, starts to read info. from it, and then there is IMMEDIATE POWER OFF, no shutdown procedure, just OFF.

In my original post, the HDA P/N (hard drive assembly?) is the one that worries me: if the PCB would be compatible or not.

Thank you for any information.