Microwaves are going that way too. I don't even take jobs on them. The reason, cheaper to replace the repair. Other than Dyson, Oreck and then the super-premium machines there isn't much money made on small appliance repair, so most don't learn it.
Though if you post in a general category you may get some help. I would look for vacuum cleaner centric repair boards.
THE issue with the shark the second poster has may get help, the first issue is a retrofit and that is very specialized.