I have a somewhat old, but functional (used to be, actually) hard drive, model Samsung HD103SJ, which I use for backup purposes. This means this is not a fixed unit.

Since a few weeks ago when I moved to a new city, I notice it wouldn't power on anymore. So, upon closer inspection, I noticed one component hanging "loose" in its PCB:

pcb scan

The component is labeled 4R7V. It appears to be actually connected... Here's a look on the opposite side:

component underside

My questions:

  • is it an inductor?
  • is it the reason why the hard drive is non-functional? Is it reasonable to expect to fix the problem by replacing it?

closed as off-topic by brhans, Voltage Spike, PeterJ, DoxyLover, JYelton Oct 18 '17 at 17:38

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  • "Questions on the repair of consumer electronics, appliances, or other devices must involve specific troubleshooting steps and demonstrate a good understanding of the underlying design of the device being repaired. See also: Is asking on how to fix a faulty circuit on topic?" – Voltage Spike, PeterJ, DoxyLover, JYelton
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  • \$\begingroup\$ Replace it : you may be lucky and it works... does the drive live in an external box? If you get it to work , consider an enclosure for it... \$\endgroup\$ – Solar Mike Oct 16 '17 at 6:41
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    \$\begingroup\$ Good job on the question. Nice picture. \$\endgroup\$ – mkeith Oct 16 '17 at 6:42
  • \$\begingroup\$ I don't think your pic is fuzzy enough. Maybe put it through a gaussian filter or something. \$\endgroup\$ – brhans Oct 16 '17 at 13:43

Yes, it is an inductor. Probably it is why the drive is non-functional. It is reasonable to expect that the drive will function again after you replace it, though there are no guarantees. I assume 4R7 means that it is 4.7uH, but I could be wrong.

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    \$\begingroup\$ As an update, I soldered it again and it indeed worked (and is still functional to this day). \$\endgroup\$ – Marc.2377 Jun 16 at 6:03

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