Hello,
Initially I wanted to avoid another Seagate 7200.x thread, but I don't want to cause any irreparable damage.
Also this is my first post on this forum and I'm also completely new to data recovery, these links basically sum up everything I know about this topic:
Pastebin

This is the drive:
ST2000DM001
Back
Cover
Front

What happened:
I removed the drive from my computer and put it back in later. Then the drive was not recognized by the computer anymore, not even in the BIOS. But it was still spinning.
Doing some research on the internet I found out about the BSY error, I ordered a USB to TTL adapter and build this level-shifter.
Here is the problem: The drive is completely unresponsive now, it doesn't spin up and there's no terminal output. I don't know what caused this,
since the HDD was laying around in a static-bag for a month until the serial adapter arrived (Which by the way works fine with a 7200.7).
Somewhere on the forum I read that the terminal could be locked sometimes. (Not sure where or if that's even true) This would explain why there's no terminal output.
And for the drive not spinning up, the platters might be stuck. In order to verify this, my plan is to connect the motor to the PCB of the 7200.7.
This is where I'm unsure about the end result, because I have no idea whether they are compatible, so please tell me your thoughts about that one.


In case the platters are not stuck, the PCB is probably damaged.
fzabkar recommended this site onepcbsolution.com for replacement PCBs, which seems very promising.
I couldn't find the exact same drive I have on list, but the PCB closest to mine is this eventhough it's for a ST3000DM001. It would be really helpful if anybody knows which of these replacements will work.
If there are any other possible solutions please let me know!
I am thankful for any help on this topic.

Hi, i don't know what will happen if you connect the motor of your 7200.14 drive to 7200.7 PCB, maybe you might damage the motor (if is still good).
Don't do it!

If there is head stuck, you should listen a very low buzzing sound if you put a ear on hdd, if it doesn't produce any kind of sounds then most probably the pcb is faulty.

I would suggest to swap pcb with identical donor 100664987, if drive powers on (motor spinning) then you should try to swap the ROM from original pcb to donor pcb, if even with donor pcb it doesn't power on then most likely head pre-amp is damaged.
In case of pre-amp damage it would be game over for DIY, you should contact a PRO.

P.S.
I have some 100664987 PCBs here, if you need...

_________________
My firmware database:
https://mega.nz/folder/O01DkBRI

Thanks for the fast reply and the PCB offer,
I will have a look at the drive again tomorrow and listen if there is a buzz sound. I already did that a while ago but I just want to be sure.
In case the PCB is not dead, which is not very likely for now, a faulty head pre-amp does not prevent the drive from spinning up and having terminal output, right?
As for the PCB offer, I really want to avoid soldering the ROM-Chip myself, because my skills are definitely not sufficient for these kind of tasks, but thanks anyway!

Depends...
A faulty preamp could prevent drive from spinning (no sounds) or it can spin but with head clicking sounds or it can produce sounds as this (no spinning motor):
https://www.dropbox.com/s/9m50645o21327 ... o.mp4?dl=0

If you need, i can do for you the ROM transfer, i have high SMD soldering skills. However i don't need to use hot air soldering station because i do have an eeprom programmer.

_________________
My firmware database:
https://mega.nz/folder/O01DkBRI

Given that it's a DM series drive, I'd be willing to take 100 to 1 odds that it's bad read write heads and has nothing to do with the PCB. These drives are a nightmare.

_________________
Data Medics - Hard Drive, SSD, and RAID Data Recovery Service Company

Bertzs, if i understood good your drive was still able to spin while you were waiting for the USB to TTL adapter.
What's not clear to me is "when did become unresponsive (not spinning)" ??

Did it stop spinning after you used the USB to TTL adapter?

Data-medics is right, damaged heads is a very common issue to find on this type of drive. I think that the first issue that has appeared was due to bad heads, the reason why after didn't spin up anymore might be due to electrostatic shock on the pcb (it's easy to damage the pcb if you touch it without discharging yourself from electrostatic).

I think HDD will spinup again after PCB swap (if preamp is not damaged), but you'll not still able to access data due to bad heads (very likely).

_________________
My firmware database:
https://mega.nz/folder/O01DkBRI

Judging from the images you sent us it looks like the drive suffered a over voltage on the 5V rail, probably the connection was tried to be plugged in the wrong way around or something because the protection resisters look damaged or burned out and Probably the TVS Diod shorted preventing power from getting to the drive.

@ShaneWard
Do you mean these?

I'm not sure what happened to the second one, but I am pretty certain I didn't plug in the drive in the wrong way.

@michael chiklis & data-medics
The HDD became unresponsive while I was waiting for the adapter or shortly after taking the drive out of the static bag to hook it up to the ttl-adapter.
Since the drive is about a year and a half old, I will give the replacement a try and see if the heads are actually damaged.

Just an off-topic question, I have the same HDD still in my computer, it's pretty old and it has around 6000 power-on hours. Now I'm a bit worried this drive will also fail sooner or later. Do you have any recommendations for a more reliable 2Tb HDDs?

You're right Shane, there is a 0 ohm resistor on 5V rail which has burned.

_________________
My firmware database:
https://mega.nz/folder/O01DkBRI

I already posted a reply, but it is awaiting the approval of a moderator or an admin, because it contains a link.

Drive isn't spinning so that points me to PCB problems. The original problem of it spinning but not being recognised is something different. If the heads had failed it would have been clicking when it was still spinning. I have not seen these drives fail to spin when the preamp is dead, not like a WD Black for example.

Looks to me like you had one problem (perhaps firmware issue) and now have also damaged the PCB.

_________________
Death is nothing, but to live defeated and inglorious is to die daily.
Data Recovery Cape Town

Well that took while, but Nick_CT is correct, after replacing the PCB with a clone it started working without any problems, at least for now. Only thing I noticed were some clicking noises right after I turned on the PC. I don't really trust that drive any longer, so I'll just backup my data and stop using it.
Thanks for all your helpful posts!

@michael chiklis I am interested on the 100664987 rev b pcbs for a 2tb barracuda st2000dm001, how can we contact? Best regards and thanks

How many 100664987 pcb do you need?
Just one?

_________________
My firmware database:
https://mega.nz/folder/O01DkBRI