The video cable can be the weak link that greatly contributes to the jail bars. I was battling a similar issue just recently on a prototype system I'm working on, until I decided to take apart the DIN-5 end of my 8-Bit Classics Atari to s-video cable.     To my dismay I discovered that the s-video signals are sharing a common shielded cable with both the luma and chroma lines being in direct contact (insulation to insulation). This allows the chroma to bleed into the luma, a
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