In my project I am utilizing a CM2009 IC between precise VGA controller and VGA output connector. It is described inside the datasheet for this IC which i can use EMI filters on HSYNC, VSYNC and DDC channels proper right after IC and just before VGA connector. Although there are https://remingtonlucjr.slypage.com/31761376/the-greatest-guide-to-emc-emi-filter-wikipedia