Repair technicians who show up at peoples' homes aren't highly skilled electronics technicians. If they were, they wouldn't be working as appliance repair peop

Repair technicians who show up at peoples' homes aren't highly skilled electronics technicians. If they were, they wouldn't be working as appliance repair people and driving to peoples' homes. So those repairs just entail swapping out entire circuit boards or assemblies, because that's all those repair people can handle (and all the repair companies or manufacturers are willing to warranty). The guy on Ebay is someone with electronics skills who discovered that that particular machine had a very common problem with that board, and offered a service to fix that one thing. It's too bad that can't be done more. It is done some: smartphone makers frequently will repair their devices, usually by having you ship the phone to a repair center. But an appliance is harder since you still have to have the on-site technician take the machine apart and get the board out for shipping, since you can't rely on consumers to do that. It's too bad consumers aren't smart enough to use a screwdriver and take simple things apart, but that's just how it is.