HDD not spinnng after rehousing PC in a new case

Hi everyone, I originally posted on techsupport and was pointed here, hopefully I can get some advice.

I'm stumped, I have a hard drive which since putting my pc into a new case, isn't working, it is not recognised by the pc, and from the sounds of it, isn't spinning. It's got files on there which are very valuable to me so I'm really hoping to be able to fix it.

I've used different cables with it which haven't worked either (which do work for my SSD's).

I did some research online and found that it is worth checking the diodes on the PCB with a multimeter, so I got a multimeter and had a look and found that the D3 diode isn't working. In the video I found the person said that to fix it all that needs to be done is remove the diode completely. It doesn't appear to be soldered in and I don't really have the technical expertise to do this so despite my attempts I haven't managed to get this to work either.

I've found the exact PCB online and ordered a replacement, and to no avail, replacing the old one with this one hasn't worked either. However, I have noticed is that the same component on both the motherboards must be getting really hot as its melting the protective foam that came with the HDD originally. After first bootup and failed attempt with the new PCB I took it back off and it smelt of burning which is when I noticed that. As well as this, I've used this multimeter on (on the diode test mode) and the D3 is now not working (it's beeping when checked with mulitmeter), when it didn't before booting it up.

I'm reluctant to send it to a specialist so any advice would be great and really appreciated. I've attached some photos below of the PCB for more information.

I've tried to be as clear as possible with what I've done, but if anything is unclear please do let me know and I'll try my best to clarify

Thank you.

https://imgur.com/a/ZvEN8C5 – Photos

https://imgur.com/a/AL1TSIE – front and back of the PCB, and HDD information.

model number for the hard drive is: WD1002FBYS-70A680

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