Help with burnt hard drive disk.

Hi,

My mother in law accidentally plugged her external hard drive into a laptop charger because the plugs fit. The actual HDD ac adapter is 12 volts, the laptop one is 24 volts.
The pcb that converts sata to usb is completely burnt with black spots.
I tried to plug the HDD alone in the pc but it wont spin.
I took the HDD pcb and it doesnt seem to have any obvious burn marks althought it smells a little bit different.
Could the hdd be still alive internally? Is it worth trying to replace the pcb.
How could the overvoltage pass through both pcb's if the first one burnt.
Thanks
Reply to poseidon2399
17 answers Last reply
More about burnt hard drive disk
  1. poseidon2399 said:
    ...
    I tried to plug the HDD alone in the pc but it wont spin.
    ...


    Did you plug in both a SATA power cable and a SATA data cable?
    Reply to ko888
  2. it would be hard to replace the PCB. you would need to find the exact model.

    the overage passes through anything that is connected to it. the only way the HDD would not be affected is if it was not physically connected to the external drives SATA controller ( or the drives PCB as you call it)
    Reply to captaincharisma
  3. Hi

    There is an canadian company specialising in supplying replacement disk drive pcb and importantly transfiring the firmware from the old pcb to the new one

    Without this step many modern disk drives wont work.

    Do you have a backup of your data on this disk?

    If not consider a professional data recovery company , but this costs a lot of money

    I am assuming the usb to sata bridge board is not part of the hard disk pcb as this makes things more complicated .

    Regards
    Mike Barnes
    Reply to mbarnes86
  4. Assuming that the surge didn't blow out the head pre-amp, the cost of a professional data recovery lab should not be a lot of money and will likely be around $300USD.

    If you choose to try and change the PCB on your own, you will need to match the PCB number and then physically transplant the ROM chip from your hard drive to the donor board.
    Reply to DR_Luke
  5. Update: I tested the TVS diode on the hdd pcb with a multimeter and it appears to be fried.
    I can change the pcb on my own ( i think ), i have all the tools i need. The thing is whether replacing the pcb will make the hdd work or not.
    I will try to remove the fried diode and connect the 2 pins directly. I'll update tomorrow. If you have any other suggestions please tell me.
    Reply to poseidon2399
  6. poseidon2399 said:
    Update: I tested the TVS diode on the hdd pcb with a multimeter and it appears to be fried.
    I can change the pcb on my own ( i think ), i have all the tools i need. The thing is whether replacing the pcb will make the hdd work or not.
    I will try to remove the fried diode and connect the 2 pins directly. I'll update tomorrow. If you have any other suggestions please tell me.

    If it is a TVS diode that is burned out, you need only remove it.

    Just be careful, if you plan to replace the PCB and transplant the ROM yourself. In many models of newer drives, the ROM is unique to the drive and if you kill it, you destroy any chance of future recovery by a data recovery professional.
    Reply to DR_Luke
  7. Ok here is how it went. I removed the fried diode but ripped a pad in the proccess ( maybe iron not hot enough ), one had traces the other had no traces: guess which one was ripped. Anyway i found another pad that looked like it may lead to the ripped one so i soldered it there but still no response from the hdd, no spin. I guess ill get a replacement pcb and see if that does the job.
    A question about replacing the bios chip: can it get fried if i let the iron too long on the pins?
    Reply to poseidon2399
  8. Before i advise too much more, perhaps you can identify the model of drive and post a high resolution photo of the chip side of the pcb.

    You have to be careful with the rom...it doesn't take much to accidentally break a leg off.
    Reply to DR_Luke
  9. The model name is ST2000DM001, pcb model is 100717520 REV B. The cheapest replacement I found is: http://www.ebay.com/itm/100717520-REV-B-Seagate-PCB-Circuit-Board-Hard-Drive-Logic-Controller-Board-/141991673667?hash=item210f5cff43:g:Xk4AAOSw5dNWoxTk
    There is a good quality picture there.

    I don't have a powerful camera for that but i can tell you there are no visible marks or burns from my observation. Do tell me if you want a picture regardless.

    Its worth mentioning that before i remove the diode and make the mess with the pad, i had tried to short the diode with a wire. This didnt work so i thought the connection wasnt good enough and thats why i proceeded remove diode and solder for confirmation.
    Reply to poseidon2399
  10. You should not be bridging the missing diode. The rom is unique to the drive... you mess and recovery is virtually impossible.
    Reply to DR_Luke
  11. Why not. Isnt it basicly the same thing? i let electricity flow by bridging right? I've done that in many situations and proved good.
    And i know the rom is unique. I could switch it.
    Reply to poseidon2399
  12. poseidon2399 said:
    Why not. Isnt it basicly the same thing? i let electricity flow by bridging right? I've done that in many situations and proved good.
    And i know the rom is unique. I could switch it.

    The tvs diode is an open switch that closes when it fails. By bridging the gap, you are replicating a failed TVS diode.
    Reply to DR_Luke
  13. Well then i did correct that i removed it and soldered for confirmation. It didn't do any harm bridging right?
    Reply to poseidon2399
  14. poseidon2399 said:
    Well then i did correct that i removed it and soldered for confirmation. It didn't do any harm bridging right?

    I doubt you did further damage, but there is a chance that there is more damage elsewhere on the pcb + a damaged head preamp from the original surge.
    Reply to DR_Luke
  15. So the only way is buying a replacement and be very careful with the chip?
    Is there a chance something is damaged internally?
    Reply to poseidon2399
  16. poseidon2399 said:
    So the only way is buying a replacement and be very careful with the chip?
    Is there a chance something is damaged internally?

    It doesn't happen often, but often enough.
    Reply to DR_Luke
  17. Ill report the results in a couple of days.
    Reply to poseidon2399
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