Amiga 3000 power supply repair?

[Astral]

Ok. So I've got two A3000 power supplies here that don't work. I'd like to get them going. I was wondering if some kind person may point me in the right direction of a couple of things to check / replace / repair and so on. Is there common parts to fail that I can check? Obviously a crash-course in electronics would be overboard, and not practical...so just a few pointers might help. I'm handy enough with what I would consider basic to intermediate electronics and soldering and so on...any help appreciated...

[Astral]

I have just ordered, recieved and tested the amigakit adaptor, just to see if the 2 x 3000's actually work before going any further. They do

So now its power supply repair time. I would rather reuse the original supplies if possible. In saying that if I can fit an alernative replacement inside the case in a factory look/operation type setup then that'll be ok.

I'll look over the post more thoroughly this afternoon.