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Seagate Hard Drive Shorting?


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#1 sparkyuiop

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Posted 05 February 2008 - 07:32 AM

Hi all. I have had an external Seagate hard drive brought to me that has stopped working. It seems to power on (the light lights up) but it is not picked up by the computer on USB. I removed it from its case and installed it on a 3.5" USB adapter and all it does is make the power supply light blink like theres a dead short. The drive does not spin.
The drive is an ST3320820A 320GB IDE Type.
If I replace the PCB do you think this will cure the problem or is it likely to be an internal fault?
Any help much appreciated.

Phill.

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#2 usasma

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Posted 05 February 2008 - 08:06 AM

Does the hard drive require more than 500 mV? If so, you'd have to be sure that an external power source was used (USB won't provide much power in these cases).

As for switching the PCB - that's an iffy proposition. I've researched this possibility with Western Digital drives (a long time ago BTW) - and found that switching the PCB can damage the drive further if it's not the exact same model/version of the PCB that you're replacing.
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#3 rigacci

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Posted 05 February 2008 - 02:05 PM

Making repairs or adjustments to hard drives requires special tools and training. It really is not the sort of thing that one can do, reliably.

At the cost of hard drives nowadays, it is not worth risking your data with a questionable hard drive.


Good luck.

DR

#4 garmanma

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Posted 05 February 2008 - 03:01 PM

I'll verify what usasma said. I did it once and the hard drive has to be an EXACT match or it's a no go. I had a bunch of work stations purchased at auction from a bank and I played around with some of the drives. I might also add, I was surprised at the lack of security, back in the day, for a bank. I was surprised to see what was left on the drives
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#5 sparkyuiop

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Posted 05 February 2008 - 06:15 PM

It is an external power supply, giving the right voltage. I would of course replace the PCB with the same one. Looks like it's the only hope. Thanks for your replies.

Phill.

#6 usasma

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Posted 05 February 2008 - 06:37 PM

The problem is in finding the right PCB - the manufacturer's change the PCB's as they need to. So you may find another ST3320820A 320GB IDE drive with a different version of the PCB. And it's not always a visual change - sometimes it's a change that's written into the firmware within the PCB. Most manufacturer's will mark the revision number on the boards - but minor changes may not get added, and may cause the change not to work.

The point of this is - what are you gonna do if this destroys all of your data? Yes, there's not much else to do - but if the data is worthwhile to you, it may pay to have a pro do this. If it's not possible to have a pro do it - then by all means attempt it yourself.
My browser caused a flood of traffic, sio my IP address was banned. Hope to fix it soon. Will get back to posting as soon as Im able.

- John  (my website: http://www.carrona.org/ )**If you need a more detailed explanation, please ask for it. I have the Knack. **  If I haven't replied in 48 hours, please send me a message. My eye problems have recently increased and I'm having difficult reading posts. (23 Nov 2017)FYI - I am completely blind in the right eye and ~30% blind in the left eye.<p>If the eye problems get worse suddenly, I may not be able to respond.If that's the case and help is needed, please PM a staff member for assistance.




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