Macintosh SE Video Issue (Single Vertical Line)

[DistantStar001]

I'm having an issue with my Mac SE where the video goes to a single vertical line (1 pixel thick) after about 20 minutes of use. If I turn it off, and wait about 5 seconds, it comes back, but I really don't like switching it off like that (as it's really not good for the power supply). The analog board looks good, but I don't have the proper equipment to check the capacitors. Does anyone know what's going on? Is it the capacitors? And if so, does anyone have a list of the replacements I'm going to need?

 

[PotatoFi]

This was a couple of months ago... any luck?

 

[Digdugpacman]

Hello, I know this is an old post but I'd thought I'd see if you still needed help with this, I am by no means an expert, but I did just manage to fix my SE with the same problem.