Can you replace components of an external drive enclosure?

I can no longer get this Lacie 2tb Dual drive to mount. I've suffered through many failed hard drives, and it appears that the actual SATA drives inside are working properly.

I think that there is a problem with the power supply (or something related). The fan no longer works.

The trouble is that this 2tb drive is made up of two separate internal drives. Ordinarily I would just put them in another enclosure. But these drives are formatted to be perceived as one by the computer. When I try to mount one on its own, the computer doesn't recognize the format and asks for it to be initialized or ejected.

My understanding is that when the two drives work together in this manner, it doesn't work to simply put them in a new dual drive enclosure by a random manufacturer. I do have one on order, but I don't know if it will work.

So the question is: is it possible to repair my existing enclosure?

Any ideas as to which part would need to be replaced and where to get one?

Thanks