Originally Posted by
Niku-Sama
well I am at a loss on this one as I cant find any thing that suggests this problem, plus the layout of the board isn't something I am quite used to.
my guess is the video encoder either has a weak connection on the blue output pin or the blue output decided to go out on it all together.
you said you checked for broken lines but its obvious blue isn't getting to where it needs to be, almost as if its before the conversion to A/V and RF outputs. could be a cap, could be a broken solder joint or the blue on that chip is toasted too.
the only way I can think of checking it would be either to replace the encoder chip.
its possible that the little chip that's parallel to the cart connector might be the encoder chip for it, only way to tell would be to do the component mod as long as that's an encoder chip like the S-ENC or BA6594AF but odds are, being a European system, its different. it'd be a lot of work but that's the direction you'd have to go to narrow it down