>” This is also why literally every company ever says that repairing anything they sell will void the warranty unless you also buy all the parts from them unless the law expressly forbids them from doing so.”
No, manufacturers do that because they don’t want to have to fix products that you’ve hacked up, then guarantee the item’s safety and regulatory compliance.
This is also why literally every company ever says that repairing anything they sell will void the warranty unless you also buy all the parts from them unless the law expressly forbids them from doing so.