I pulled a LED one apart, it had a several long thin flouro tubes inside it to provide light & several sheets of plastic to help it get about.
There were 3 IC boards & a long thin boards down two sides of the screen.
The 3 boards had a little gold on them & the 2 long thin ones had a full length row of small gold contacts on its edge, this connects to the sides of the glass LED screen.
There IS gold, not much as I expect modern TV manufactures to really skimp on gold because of the price.
You think the layer of gold is thin, see whats on the side of a plastic chip packet, itsa layer of Ali, you can hardly see thru it but its still a layer of Ali.
If they can plate plastic with a layer this thin, expect them to do the same with Gold....