alright then, many thanks for your help. Thanks to you this drive spins. I will wait for more pros' insights on this case.

It's still impossible to say with 100% certainty that the board is fully functional. Yes, it was repaired to the point where the drive started spinning, but that doesn't mean it's free of any other faults. Ideally, it would be worth trying to run the drive with a 100% working board from a donor drive after transferring the ROM. You can buy a faulty hard drive for a small amount, but it's better to look for a working but used one with a compatible board, and after experimenting, sell it for the same price you paid for it. You won't lose anything.

This failure is quite unusual for a head problem - such a loud beep could be caused by either a jammed motor, which is wrong, or heads that can't move due to sticking to the surface, which is also wrong, or heads that are stuck in the parked position, which is an extremely rare and unusual problem. Is it known how the drive failed?

In the video, it's hard to hear what the drive is doing other than spinning up and the very loud beeping. Place the camera where the head assembly is, next to the SATA port, for better audio.

I also hope you connected the drive to a computer power supply when not filming, and didn't just try running it through an external enclosure.

Thanks for the reply. Here is a more audible video, I definitely plugged it directly to my computer this time:
https://convertandedit.com/share?share= ... 4a4716b419

Yes, this was also audible in the previous video, when the hard drive didn't beep during the first attempt to start. The good news is that the board is most likely repaired and in good working order. The hard drive heads are also likely fine - the drive sounds like it's going through the initialization process smoothly. I'm not sure about the rhythmic clicking noises that follow. It's possible the drive is performing some kind of internal diagnostics, which is normal, or it's a sign of a problem. I haven't encountered such drives, so I can't say for sure.

Also, the fact that the drive is freezing the computer is partly good news, since the connection between the computer and the drive is established and the computer is simply waiting for the drive to respond. Give it 5 minutes, and it will continue booting, although it most likely won't detect the drive.

You can, of course, further diagnose the drive - very old computers from the Windows XP era and programs like MHDD ​​or Victoria for DOS are best suited for this. You can also connect to the drive using a USB-TTL adapter, which costs about a dollar. You might already have one, judging by the soldering equipment and adjustable power supply. However, I'm not sure if these drives output anything to the diagnostic terminal.

The bad news is that if it's a software issue, you won't be able to do anything with the drive without specialized equipment like the PC-3000. But then again, for professionals with such equipment, it probably won't be difficult to restore the drive to full functionality.

I hope that people who regularly deal with such drives will check out this thread; they'll probably know better what to do.

Many thanks again. I will wait for others' insight for this case then.

Windows can clean up some damage to disks using a full scan mode to detect bad blocks etc

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Orico DS500C3-US-BK 5-disk 3.5" SATA, iTGZ 4x M.2 2280 Thunderbolt enclosure NVMe/SATA, etc. etc.

what the hell are you talking about? Why do even bother commenting when you don't even have a slightest idea about data recovery?

CHKSDK can revive disks as it reads every block so it forces older disks to refresh every sector

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Orico DS500C3-US-BK 5-disk 3.5" SATA, iTGZ 4x M.2 2280 Thunderbolt enclosure NVMe/SATA, etc. etc.

get lost! blocked!

The only goal of chkdsk is to restore file system integrity, on whatever cost. If it means discarding file records, then do that, user data is of no importance. Running it on a disk with surface problems will almost surely lead to data loss and further damage. You clearly have no idea about how to deal with disks having physical issues while spreading your 'advices'.

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Adatmentés - Data recovery

Seagates are diagnosed via the terminal. That's all.

very well. I will try the USB TTL method, if everything else fails I will take it to a pro.