Hello everyone, I took a drive from an iMac Late 2009 and I wonder if there is any DIY methods that I can do.

The drive won't spin up at all and is partially recognised only in Linux (if you can call that recognition). So I wonder if there is any resistance check I can do on it.

Here are the photos of the drive: https://imgur.com/a/yYPhnhR

Near the SATA power connector, you will find zero-ohm resistors ("0" and "000").

Also, there is a 5V TVS diode ("5JT") and a 12V TVS diode (above the 1R0 inductor).

TVS Diode FAQ:

http://www.hddoracle.com/viewtopic.php?f=100&t=86

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A backup a day keeps DR away.

thank you so much for your time. I read your guide thoroughly. I think I got it right

"5JT 42" shows some resistance but nothing on "KVP 47A M".

I am thinking about removing the "KVP 47A M", would that be right move to make? did I got that right?
https://imgur.com/a/nwlVY0z

What are the actual ohms readings?

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A backup a day keeps DR away.

"KVP 47A M" is zero on both sides to the ground.

"5JT 42" is zero on one side and the other side is changing every time I take the probe out and stab it again. 16k, 79k, quite weird

here is a short video I recorded while measuring, maybe you can tell me more quicker this way.

https://streamable.com/srxt2n

this doesn't seem like shorted. I would use diode/continuity test mode instead...
the fact that linux detects something suggests that the pcb is giving some ID, so it is a bit unlikely to be the problem. Try listening closely when you apply power, if you hear some cirping, either spindle is stuck or heads stuck to platter...

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Adatmentés - Data recovery

I switched to diode mode and both of the component read OL.

Then I plugged the drive again just to make sure if I hear anything at all...

...and the drive started spinning!!! Why? and How? Owner of the drive tried many times and three different enclosures. I also tried on my fully functional two different computers.

What have I done to be blessed by Platter Gods???

I am cloning the drive right now

Be careful with this cloning thing, if it ever starts slowing down, stop it immediately (power down). If heads were stuck, they might have gotten unstuck but their suspension springs may also have got deformed, in which case this is a timed bomb, can fail sooner or later and if you don't switch it off immediately, severe damage can occur.
That's why the standard process of recovering from sticktion involves checking heads without ever powering the drive up. Many ppl fail to do that and the result is a disaster...

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Adatmentés - Data recovery

it is %60 now and is going without any stuttering. Thanks for all the replies fzabkar and pepe.

one last thing, just out of curiosity, any idea why the drive acts like this? could this be PCB related at all?

This may have been due to oxidation of the contact pads. They need to be cleaned.