Wavyness on bottom of JVC I'Art TV screen. (Includes video)

[Paranoid_Andy]

Hey everyone.

I have a JVC I'Art AV27F802 TV that is displaying this weird wavy effect on the bottom of the screen. It's very subtle on the video but very noticeable in person.

I have another very similar 27" JVC I'Art AV27WF35 that I plugged in the same outlet to the same game console and it doesn't do this. If I turn on the OSD the wavy lines seem to have no effect on the OSD. So I'm thinking maybe there is some kind of noise on the line before the OSD input causing interference. It also happens when using the front and back inputs of the TV.

So I'm wondering what could be causing this. I also wonder, could an RGB mod maybe bypass this issue since the OSD seems unaffected?

Any ideas?

Thank you for any help at all!

Here is a video to demonstrate:
https://www.youtube.com/watch?v=z2XZ6w1FTNk