Hi all, I'm done with modding a TWIN Famicom and I have an issue I can't get to troubleshoot. I'm using the the original RF modulator port. The issue is I have small interferences particularly visible on the blacks (I can't see them on any color). Like tiny white dots all over the place. Where it gets strange is that I can remove those interferences by plugging either of the original composite port (image or sound) to any composite port on my tv. I've ruled out sync issue because the issue is exactly the same whatever sync I use. I even isolated the video composite port by removing r214, but still, interferences are here and disappear when plugging a jack. To be specific the jack needs to be plugged both ways. If it's plugged to the Famicom but not to the TV the interferences are back. I just don't understand how those ports I'm not even using could have that effect. Do you have any idea?