Such can be connectors and contacts as well. You as a TV tech would run into that. There are YouTubes about connections like this one. https://www.youtube.com/watch?v=WuwG5wqxTpE

That shows solarization but you can get lines too.

As to component many get upset there are few to no board level repairs today. You swap boards, cables and such to fix the units. The hourly rate is why. For so much money you get a board. If it takes you half a hour to find a bum chip, then another half hour to find the chip, the shop charge is less for a board so you change boards.

There are no TV techs here so you find the service manual or buy it (www.samsungparts.com) as well as google "how to fix lines on my HDTV" and more like https://www.shopjimmy.com/tv-repair-tips

32 inch models are rarely fixed in shops given the min shop counter charge today.