I've been trying to fix a Neo Geo Aes for while but I haven't succed. The audio is OK, but the video shows some issues, it's like a scanlines effect (at least that's what it looks like on CRT but looks different on a LED TV) that only affects one graphic layer, the one that manages the moving sprites and backgrounds; the lifebars (in fighting games for example), credit signs and other fixed graphics display flawlessly. There is also a rainbow banding effect with composite connection which goes away when using an RGB cable. I don't think it's a cut trace or via because I've checked almost everything.

Here are some videos so everybody can see what I'm talking about:

On a CRT with composite:

On a LED TV with RGB:

A closer look

So if someone can give me a hand with this I'll be very gratefull.