Hi!
Please, someone would be so kind to answer to my questions?
If yes, thanks a lot in advance!

THE FACT...
I have two HDD Seagate:
Hard Disk A: Seagate Barracuda 7200.8, 300GB, Ultra ATA, Model ST3300831A, P/N 9Y7284-301, firmware 3.02 (its Logic Board has burnt!)
Hard DIsk B: Seagate Barracuda 7200.8, 300GB, Ultra ATA, Model ST3300831A, P/N 9Y7284-301, firmware 3.03

THE QUESTIONS...
1)
may I upgrade or replace the firmware on the Logic Board of Hard Disk B, from 3.03 up to 3,02, so that to try to replace the Logic Board burnt on Hard Disk A and then to recover my data?
2)
If YES, How it can be done? What procedure it requires? (I'm unable to manage DOS language!)
3)
we suppose I'll do it... which risks I run onto damage to the Logic Board, or to the Hard Disk, or to the data?
4)
we suppose I'll do it, and in order to recover my data from Disk A, I've still upgraded or replaced the firmware on the Logic Board of the Disk B from 3.03 up to 3.02,... then I'll not be more able to use the Disk B again? Perhaps I have to replace again the old firmware on the Logic Board?
5) does it exist a 'generic' firmware with which is possible to approach to data of any Hard Disks of same model?
6) a last question (but not as "last"!)... where i can download firmwares for Seagate Barracuda 7200.8, Ultra ATA, Model ST3300831A?

I would be very grateful for the answers.

Hi,
How you resolve your problem? very interesting, I have same problem with my ST3300831A.

3.02 and 3.03 is version of firmware on the platters not on the PCB. If both PCBs look the same you can just try your good one on the burnt - good chances it will work.