It's not even some difficult technical task like people think. The back of a TV is kind of like a PC but much simpler.

There is the power board (AC to DC conversion for electronics and leds), video input board (where you plug in HDMI etc) and a t-con board, which takes a single video signal in from the input board and drives the LCD screen.

Then there are a few ancillary components like speakers, maybe a roku module etc. There are easy to find and everything is modular. You can take the speakers out and use them somewhere else if you want. You can just disconnect the wifi antennae on the smart tv board and be done with it. You can also find the IR led connection that the remote sends signals to.