Super Nintendo – PAL SNES
Here is a guide to modding the full-sized SNES, covering how to open it up, remove unwanted ports, relocate the game cart port, video, powering the system, trimming the board and advice on other relevant matters about modding the system.
Had to break the guide into multiple parts as otherwise the .PDF didn’t work. ;)
PAL SNES modding guide – part 1
PAL SNES modding guide – part 2
PAL SNES modding guide – part 3
There is a very good section on this site for doing an RGB cable, region and lockout modding (to play NTSC) and replacing the fuse if you mod your SNES without turning the system on with power off, to discharge the capacitors.