Seagate 7200.10 ST3320820AS - location of TSVs

[mcholst]

I have a Seagate Barracuda 700.10 320GB

ST3320820AS
P/N: 9BJ13G-060
Firmware: 3.AFE
Date Code: 07306
Site Code: WU

The sticker on the PCB says 100436210 C 3728N2FE


The drive spins up and keeps spinnning, when connected to power, but cannot be found either by windows or my bios, as well as my computer can't boot when the drive is connected.
I have read a lot of burned TSV's in this forum, so I want to check for that.
There is no exterior signs of burned components, but I thaught I would check with a multimeter anyways.

I just need some help to identity the TSV from below picture

PCB Seagate 7200.10 ST3320820AS

I guess I can just measure on each side of the TSV with the multimeter put on "diode". But is there any ways if the voltage circuit is working (I'm a total newbie with my multimeter...), and do I have to check some specific pins on the sata power connector (thinking of the 15 pin flat thing in the lower right corner of my picture).

I looking forward to hear your responses.

[loki]

Hi,

As you say the drive spins up then its not TVS diodes as if they were faulty the drive wouldnt get power & the platters wouldnt spin.

[mcholst]

arghhh. Any ideas to what else it could be? or what to do?

[pclab]

arghhh. Any ideas to what else it could be? or what to do?

It should be checked by a tool, to see what's happening to the HD.

If you want, there are a few topics about a Nokia cable to be used to see the terminal log. Search for them.

NOTE: if wrongly used, you can kill the HD and the data, so use it your at your own risk.
If data is important, send it to someone who knows what to do.

Cheers

[mcholst]

arghhh. Any ideas to what else it could be? or what to do?

It should be checked by a tool, to see what's happening to the HD.

If you want, there are a few topics about a Nokia cable to be used to see the terminal log. Search for them.

NOTE: if wrongly used, you can kill the HD and the data, so use it your at your own risk.
If data is important, send it to someone who knows what to do.

Cheers

So maybe I should just go for a new pcb for around 50$ which is a pretty low price to avoid the risk of completely destroying the drive.

[Nick_CT]

If the drive is spinning up then there's a fairly good chance that it's not the PCB at fault, so I wouldn't waste your money on that without finding out exactly where the problem lies. You can get a USB/serial TTL connector for cheap to connect to the drive's terminal to see what the output is, if you want to pursue it.

For your info, the 5v and 12v TVS diodes are circled below. BUT they play no part in your drives problem, so no need to fiddle with them.

[Vulcan]

So maybe I should just go for a new pcb for around 50$ which is a pretty low price to avoid the risk of completely destroying the drive.

Based on my (non-DR) experiences of disk failures:

a) The fault is unlikely to be the PCB, since the drive is spinning.

b) The process is not as easy as just swapping the PCB - SMT soldering is also needed, to move a component from the old PCB to the new one.

c) If, as expected, the new PCB (with correct procedure above), makes no difference to the problem, then you have incurred risks (e.g. possible ESD & physical damage) and still learned nothing about what the actual problem is - and so you would be no further forwards.

As pclab says, if the data is important, then you really need to consider whether you want to take the risks of DIY investigation. The only way that I can see for any further DIY progress, would be to look at the terminal output from the drive - hence the mention of a Nokia cable (or similar). In fact, looking at that output would be part of the diagnostic procedure used by a typical DR company, to diagnose the problem with the disk.

So if you really want to change the PCB, then you can go down that path, but I think you'll be wasting your time & money.

However, as pclab says, there are risks and, frankly, it is unlikely that anything you see in the terminal output would give you a DIY solution. That output might allow a DR pro here to give you a more detailed diagnosis - but it might not, since they could not do other diagnosis remotely, as it requires equipment in their lab.

FYI, there is a DR pro board member in Sweden, though I don't know of one in Denmark (anyone else know?).

[Edit: I see that Nick_CT has just said most of the same things ]

[mcholst]

If the drive is spinning up then there's a fairly good chance that it's not the PCB at fault, so I wouldn't waste your money on that without finding out exactly where the problem lies. You can get a USB/serial TTL connector for cheap to connect to the drive's terminal to see what the output is, if you want to pursue it.

For your info, the 5v and 12v TVS diodes are circled below. BUT they play no part in your drives problem, so no need to fiddle with them.

foto 1.JPG

Hi Nick
Thanks for your reply.

If it is not a pcb fault, what do think it is then?

I'll try to connect to the drive's terminal. I guess the cable your are referering to is the same I saw on youtube made out of a nokia phone cable (?). Do you know if it is possible to buy somewhere (I'm not 100% sure what to look for on google to find the right cable)

[italian-recovery]

Hi!
yes you can build the terminal cable with a Nokia data connection cable.
Your drive could have a firmware problem.. be careful!
If you don't know exactly what you are doing you could lost definitively all your data.

So this could be a case that a data recovery company could simply and cheaply resolve for you..
If you need help you could send me a PM.

In other cases search on the forum what you could send to the terminal to try to unlock your drive..
bonne chance!