If you had a scope or maybe a DMM could see it, a lot of the chips in the PSU section will have some power-good or power-ok pin, or some reset or enable pin, that will change digital state, when a problem is detected, and trigger the reset of some chip closer to the mains input.
This reminds me I have a TV to fix, but I think it's the LED strip, and IDK if it's worth it to buy some replacement. I've taken screens completely apart too scrap them, but had to break them to do it.