Long story short, I managed to get a fairly good looking SNES shell fairly cheap,
It has all the proper components internally, but it fails to read any carts (despite cleaning/swapping pins).
It just boots to a black screen.
So I had two sfc's, so I took apart my buggy sfc, and put it in the snes shell,
before closing it up all the way, I booted it up with a game,
(with the usa controller plug part connected)
And when I started it, it blew the main fuse!
That was odd, I was using an OEM sfc power supply, could the USA controller connector have caused the issue?
I tried bridging to bypass the fuse, and It would only flash the power light on boot. (dose not start game)
I don't mind buying another SFC down the line, I just want to know what caused the issue, so I'll know if it's worth trying again.