Seagate Barracuda 500GB 7200.12 External (9sf2a2-500) - Can I swap pcb

So I plugged in my friend's external hdd to a laptop power cord (silly, silly me), and now the hard drive won't start up, even when I put it into my desktop as a slave (bios won't even detect it). I'm 99% sure that something is fried on the pcb and I have to recover this data or I'm dead. If I buy the EXACT same hdd and swap the pcb, will I be able to recover the data?
If no, ANY other suggestions would be greatly appreciated.
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  1. Best answer
    People post here on a weekly basis after replacing pcbs from dead drives with identical ones from working drives, and say it doesn't work. I wouldn't bother going that route, and save the $100 from buying/destroying a drive.

    It's possible you just fried something in the external casing and the drive itself is fine. I would try removing the drive from the casing, and putting it in another casing or connecting it directly to a machine. If the drive is still not readable at that point, and you must have the data back sending it to a data recovery center is very likely your only option to retrieve anything from the drive.

    The first is a quick/easy option to try, the second not so much, but if you want the data that is the most realistic way of getting it back. Replacing parts on a hard drive will rarely if ever fix anything from what I've seen.
  2. I tried connecting it to my machine using after taking it out of the casing like you said and the only response I got was an electrical smell, so that's why I'm assuming that I'm screwed.
    What are the chances of a data recovery center actually getting the data off it? If its shorted out or something will they even try to recover anything?
  3. And any idea what cost I'm looking at? That's always helpful..
  4. I would say 99% chance a data recovery center can get the data back. Cost starting around $600, and going up to $2,000 or so depending on how difficult a job it would be. Generally they will do a free analysis, and let you know if the data is recoverable and how much it would cost to get it back.
  5. Ok, thanks a ton for the help. Looks like I'll be delivering some bad news though.
  6. Best answer selected by Eternalturnofthewheel.
  7. @Eternalturnofthewheel, in most cases the result of an overvoltage from a 19V laptop adapter is a shorted 12V TVS diode. The solution in most cases is to simply remove the diode with flush cutters. This will cost you nothing, except the price of a Torx 6 screwdriver.


    ... and (photo clips)

    If the board has sustained additional damage, then the most you will need to pay to replace it, including a firmware transfer, would be about US$50.

    A firmware transfer is required because most modern HDDs store unique, drive specific "adaptive" information in a serial EEPROM chip. This chip, or its contents, needs to be transferred from patient to donor.

    The following PCB suppliers offer a firmware transfer service, either for free, or for US$10:
  8. fzabkar is certainly more knowledgeable about the workings of the drives then I am, by all means investigate the offered solutions and if you work through them with positive results let us know.
  9. I had a problem with my hard disk, when it's connected the power supply won't start. after research I ordered a PCB from They delivered it to me within one week, now my hard disk is back to life.
    They are doing a good job, worthy to trust
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