A short video of it with an xbox360 480i: https://youtu.be/D4EhXJjPVBg
And a couple shots from the NES at 240p of course. https://imgur.com/a/x8C0iqJ
Picked up this set last week, a bit of a white whale for me, only to find that the component input is intermittently losing white. Nothing I do on screen seems to make it happen, it's pretty much just random.
The OSD is perfectly fine and displays as it should, and the composite input is also fine.
Any ideas where to start to fix this? The service manual is readily available with a quick search.