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?