So I was happy with that, I packed everything up and brought it to my own place. I have a similar TV, a 32" LG LCD (32LG6000) which is just slightly older, but it doesn't work half as good as my mother's! The biggest issue is that it only works when I set the video at 60 Hz and it's terribly wobbly (horizontally). When I switch to 50 Hz the screen turns black, but the audio keeps playing, so the game is fine. This is pretty much absurd, as I live in PAL land, so 50 Hz should be more than fine, and beside that, I used to play fine with this very SNES on this very TV before the mod (using this very retrogamingcables.co.uk RGB cable too)!
I thought something might have disconnected during the moving, but I brought the SNES back to my mother's and it's working fine there! Any idea about what could be wrong?