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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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.
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?
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.
@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.
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:
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 http://www.onepcbsolution.com 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