A quick off/on usually gets it going again, at least for a little while. Sometimes it’ll go hours without incident. I have no clue what brand of TV was used to make this contraption, but it’s at least 10 years old, and the manufacturer is out of business.
Given that I can usually get it going again with a power cycle, do you think it might be the power supply? I’m guessing that I should probably take a look at the caps when I have it open and see how they’re holding up.