Can anyone help me please?
I have a fried Seagate HDD with all of my work on it. As you can see there is a fried chip on PCB. I tried swapping PCB for the same one with 3.05 firmware...no luck. It spins, but nothing happens.





Seagate U Series 5
ST340823A
Firmware 3.05

Thank you in advance.

move rom to new pcb

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Zero Alpha: zeroalpha.com.au
Find Cheap Donor Drives App: https://www.zeroalpha.com.au/donor-drive-app Updated February 2026

Really sure ?

If you have got a real matched PCB, remove the "Rom" (BIOS chip) which have 8 pins to the new PCB you've got, any try again, it may be work.

If it doesn't work, for a pro is needed.

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Provided HDD PCBs and donor HDD, Real in stock
eric_lee8341@hotmail.com

Hi
I don't think so....On this series the rom is an ATMEL chip with 40 pins (or more, I don't remember exactly)...So it requires more soldering skills or an specialized equipment to change it...Of course he must match the pcb and after that to change rom...
Rgds

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www.datasave.ro

Yes, the ROM is inside the chip wich is in center of the pcb.
This is hard to replace for a none-skilled person.
I suggest to find a pro.
If you preamp is OK, this can be cheap case.

Janos

If you have pcb with same firmware it should match direclty , there must be some other problem .

Hi Friend ,
Thats not the critical problem as we have to try repair the orignal pcb to get the data back but always ask the case history as many time the clients handling is not good to create any other problem like some jerks and all .
1)You tried in better way with same Model no with Firmware..
2)afterthat try to repair the orignal PCB..and after that you are not get the data back than you have to think about how this problem occur and case history of the hard drive..and ask with proper case history..

Sorry, I have to revise my mistake.

Yes, ccc you are correct, Rom is in ATMEL chip, so I think deckerd you have to find a pro. It is hard to deal with by personal without any experience.

Or tell more story here, may be the other pro here could help you.

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Provided HDD PCBs and donor HDD, Real in stock
eric_lee8341@hotmail.com

There is not much to tell. Electrical shortage, result- fried PCB (as you can see on the pic. got smoke from it) Bought same model PCB on eBay, same Firmware but different p/n number, part number, etc. Drive spins but not recognized by PC. No clicking or other strange sounds. Any help is appreciated.

Is this case still active?
seems more than 8 months old...

pepe

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Adatmentés - Data recovery

If its the same firmware 3.05 it should work .