And as I said, it's not guaranteed that they're scrapping the broken hardware. I know for a fact that Apple, for example, does at least some component-level repairs, which is why they require their stores and service providers to return most broken parts. (Things like batteries, keyboards and displays are scrapped, but motherboards, power supplies, etc. all go back). They're repaired and then become a spare part for future repairs. It's just that the component-level repairs aren't done at the stores and service providers. Those replace modules or entire machines for the customer. Some repair depot reworks the failed modules and machines.