I fix (flatpanel) TVs as a side hustle, but I wouldnt call that technical since 90% of the time, its just a blown capacitor on the backlight power rail. 6% of the time, its a blown backlight itself, and the remaining 4% of the time its something else that usually requires in my personal experience, for me and my limited skills (Which is mostly just common sense and internet searching, no actual practical skill besides knowing how to solder), to either pass or part shotgun it, depending.
well, i've gotten a few broken screens, but those arent fixable, so i dont really count those.
mostly I'm just a gamer, and any technical skill I learn is because i'm forced to to unfuck something with my linux install, heh.