I have a relatively old graphics card laying around, that once broke for a reason, that I don't remember anymore, and since I didn't know what to do, I bought a new one. Years have past and the old graphics card has been collecting dust ever since. Until now, because I want to find out what's wrong and how to repair it. It's an R9 280X, like the one in the picture. While I want to get the card repaired, I see it primarily as a learning experience and as such I don't mind the price of the tools and items needed, exceeding the final worth of it. It seems to be fairly accessible from the outside, having normal screws and nothing particularly hidden.

I knew a guy, a while ago, that could do this stuff, so I'm confident, that it can't be too hard to learn, but I don't do anymore, so I'm asking here if anyone knows how to go about this.

1) How do I learn about this besides reading hardware documentation?
2) What tools (if any) do I need to repair it?