Yes, I plugged in the wrong cable and I burnt something in there. I know absoulutely nothing about this but I opened the case and it was obvious where the damage was done. The little black square to the left is partly melted and there was soot around.
I’ve seen posts here about burnt diods and some of fzabkars posts. From what I can see it doesn’t seem to be (only) a diod in my case. That melted part right behind the ac socket must have some function too?
That board is a USB interface only and you should be able to disconnect it from the actual drive. Its not part of the drive electronics. You will then either be able to use the drive on its own in say a PC or buy another interface to make it USB again. These interfaces are quite cheap and are sold on eBay. You don’t mention what the actual model of the drive was before you took it apart.
I’m sorry but I have no idea. I put that link in as a warning but it may not be correct. I would think that the damaged board was simply a USB interface and any drive electronics would be within the actual drive. However I have real expertise in this field so its just my opinion.