I recently got a SNS-CPU-RGB-01 SNES. To my surprise, the video is not as good as with my old SNS-CPU-GPM-01 over S-VIDEO. There are some faint but noticeable diagonal lines. Please see the pictures for which I tried highlighting some diagonal lines:
![Image](https://i.ibb.co/XzfC6bC/diagonal1.webp)
![Image](https://i.ibb.co/SdCfsPX/diagonal2.webp)
![Image](https://i.ibb.co/S3NDVRt/diagonal3.webp)
I have only seen some workarounds for the APU board revision which imply lifting a PPU2 pin. I am not sure if that is going to work in my case since I am using S-VIDEO and lifting this pin seems to affect the composite output, not sure if the S-video output as well but I am not taking any chances until I am certain it won't affect.
I am using an official Nintendo AC adapter which has never given me any noise issues with my previous GPM-01 model and an S-video cable from amazon which I was also using on my GPM model without noticeable diagonal lines. This is one of the good ones that have the chroma and luma signals properly aligned instead of picking up the composite pins.
Any ideas?
Edit: This only happens with S-VIDEO and not Composite. Cannot confirm if it happens too with RGB since I do not have an RGB-capable TV or any RGB cables even.