I'm guessing there's probably how many sets of values do I need to write down? 16 or so? I've seen a video about accessing the service menu, and it's been urged you write down all the current values.
No pressure, right? At this point, I'm pretty certain it's overscan, like you said, Ziggy. I've tested and found consistent issues on the margins for:
- * Super Nintendo
* PS1
* Sega Saturn
* N64