I'm trying to connect my Master system Model 1 to the XRGB Mini Framemeister. I can get it to detect the game fine, but I have a ton of flickering white dots that shouldn't be there, almost as if there's an interference.
However, when I plug directly into the TV, I'm not getting this issue.
I'm using C-sync Scart Cables from retrogamingcables.co.uk and you can see how the flickering lights look here:
Is there a way to fix this? Maybe a Framemeister setting I'm missing?
I'm afraid I don't have a Framemeister so can't really advise. What I can see from your screen though is you have pretty bad case of the Jailbars. I too get this issue with various severity depending on what SMS I use. Interestingly, when I use a Megadrive with Master System convertor I don't get the Jailbars, so I've taken to using MD for my SMS games. Same cable from same company.