Ever since I began to use composite sync from my SNES mini, there are certain points where there is a strange white bar on top of the screen, usually whenever there is a brief completely black screen. Has anyone seen this before? My first guess would be an issue with the strength of the sync signal. I have an example here, you can see it twice within the first 10 seconds of the video: http://akiteru.altervista.org/
Thanks for the help.