[old_tv_nut]

"Also, I want to reiterate that this bars issue only shows up in the image of a certain brightness value (and therefore, I would assume voltage value). It's somewhere around 50 IRE I think. If the image is brighter than that, it won't show up, and if the image has bright areas and dark areas, it's only visible in the medium dark areas, and general only really visible in solid colors like you see in most video games."

If the cap is the problem, doubling the value should halve the contrast of the bars. Sounds like that's not happening.

Peculiar that it only shows up at medium gray level. How does it vary when you turn the brightness up and down with a blank screen? Worse at low brightness, medium at medium brightness, goes away at high brightness?