I have the exact same issue with my 7800, but it's a lot less visible with my console than on the screeshots posted by A-T-A-R-I. It's a PAL-B version and it has composite video out. The effect is the same using the real cart or the rom loaded in the Harmony. I can't say if the issue was there before the A/V mod, because the rf modulator didn't work when I bought the console.
Does it on all tvs in the house, but only using this console, so I am sure it is something with this console. Here are some pics, not that great.
Really strange. When you turn the paddles, you can see movement within the darker area going up and down.
- Atarian7 likes this