SNES Generation 1 Video Problems, 50+ Units with same defect. RF Works Fine, RCA Output BAD

[neojapan]

Thanks everyone for the replies, I tapped into the video encoder directly, Red and Blue, I got green from pin 7 as in this picture:



But it didnt display anything so i just got green from the encoder directly, unfortunately colors show almost black and white, but its showing picture



I'm yet to try and replace Q10, ill try that later, but what you guys think? why are colors showing like this? thanks again