I have 2 SNES mobo's one's the RGB-02 from 1995 and the other is the one with the sound daughterboard from 1990. The 1995 mobo displays s-video in color. The 1990 mobo displays s-video in black and white. I've tried looking but haven't been able to find any documentation on if the chroma signal is output on the original SNES or is there a mod that needs to be done.
Composite is in color. The resolution is very blurry. At first I thought it was the cable as one of the multi-system cables I have only displays PS2 and XBOX in S-Video. But then I found a Nintendo S-video cable and it only works on the one mobo. I'll check out the you tube vid. Thanks.