It turns out that electronics 'items' these days are made in batches, say you LG TV, are made in batches, e.g. first Run of 20,000 units.
If it turns out to be popular, "they" will order another 50,000 or 100,000 unit (usually with slight changes or 'improvements' from retailer feedback).
If it really popular or one of the big chain shop commission the 'next' version, 250,000 maybe order up front and provide their own 'in house' support,
which usually consists of a replacement or refund or to the customer (which is then charged back to the manufacturer).
As Parts / boards are mostly made in specialist factories, i.e. Silicon chips made in one factory, transistors somewhere else, capacitor, cables, circuit
boards, flat screen, plastic housings, plugs, remotes, screws, stands etc.etc all made by the cheapest bidder. Each are only paid for the supplied
'working' or correct spec. parts so no spares unless they are paid for up front. As retailers have a 'win-win' payment between customer and
manufacturer they have no interest in purchasing and stocking thousands of pounds of spares for something that only has a few years of life built in.
Welcome to Edison & Ford's world!