Very fascinating! I wondered about this and went to search around a bit, and found this bit[1] (though this is more about CRT TV)
> When we used to manufacture TVs, we'd produce them for customers in the southern hemisphere too. When building these, we had to run them through our production lines upside down.
> When the old cathode ray tube TVs were built, the earth's magnetic field was taken into account during the production process. This ensured the current flowed the right way through the TV and so the TV was able to function normally.
[1]: https://twitter.com/SonyUKTEC/status/1228239522166501376