I'm using an old Sony CRT, Super Famicom with GameCube RGB Scart cable, Megadrive power adaptor! + PAL SNES controller
I've just tested my entire colleciton, and it only happens on the following games:
Street Fighter II Turbo
Super Ghouls N Ghosts
Castlevania Vampire Kiss
Mickey's Magical Quest 3.
And weirdly, I have two bizarre problems with the following games:
1. Super Mario Kart - the title screen options are all messed up - 'start' doesn't work, up and down are the wrong way round and select makes me go back. I physically cannot get off the title screen...it's just an endless loop of options.
2. Pilotwings - the icons on the title screen don't work at all, so again, I can't get off it.
3. Starfox - graphics are completely messed up and I can't see the screen properly, although the sound is perfect!
Surely it cannot be the Famicom as most games work ok? But it's weird that with each game, it's a small problem within the game itself!
I might try to buy some loose carts of the above games to see if the same problems exist, then I know it's the SFC!