TVs used to come with circuit diagrams so that people could repair it themselves at home using standard parts. I've not seen anything like that in many years, even for far simpler appliances.
> TVs used to come with circuit diagrams so that people could repair it themselves at home using standard parts.
Nowadays a brand new high end +2000€ Samsung TV comes with ads (!) in the menu and the apps feel like they'd be running on a potato. With that kind of Smart TVs, the hardware won't be the issue since it'll be the software that will be obsole way before the hardware. Smart TV is not a promise, its a thread.
I feel like that's a disingenuous comparison, given how complex the electronics of appliances must be nowadays (disclaimer: I have absolutely no idea, my experience is strictly at the software level) - but the general principle should still apply to be able to use products that you own in a (non-harmful) way that you choose.
Still there are components were a schematic would be useful. For example a schematic of the power supply, since 90% of the faults that TVs have are related to that. A power supply is not that complex and having a schematic would mean that repairs would be simpler.
Also nowadays it would be useful to have some sort of debug port, for example a serial port to connect and have a CLI to do diagnostic, upload a new firmware, etc. They have these interfaces in the TVs but most of the time are either disabled or protected so the end user cannot use them.
That would mean you could fix it yourself and cut out their authorized repair program. Better to just not put release the schematics, but also not go after anyone that creates the schematics either.
See dishwashers, microwaves, Apple iPhones, and washing machines. Car manufacturers still publish schematics for their circuitry (for a fee)