I have a 1TB Seagate hard drive with a PCB failure. A diode and several other components on the original PCB were burned.

I replaced the PCB with another one that has exactly the same model number and even the same board number. I also physically transferred and soldered the ROM chip from the original PCB to the donor PCB.

However, the drive still does not work. Do you have any idea what else could be causing the issue?
Im not professional in HDDs

in what way it does not work?
does it spin up at all?
maybe clicking?

pepe

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Adatmentés - Data recovery

Nothing bro

Create a foundation you can work from.

Remove the PCB from the drive.
I would start by trying to read out the ROM.
Then I would check voltages.

You need to determine where the fault is.

If the above checks out, you would then need to hookup to term and review output.

There is no such thing as "nothing".

Maybe you damaged it?

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A backup a day keeps DR away.

Common mistakes that i've seen from unexpert users is rom bad soldering joints (bad technique, low quality solder, lead free solder, low quality soldering iron tips) and no use of flux.
Another possible mistake is ic soldering upside down.

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My firmware database:
https://mega.nz/folder/O01DkBRI