Built-in Microwave/Oven Combo Maintenance

Couple problems with this unit (1) Sounds like the vent blower above the microwave (vents into the kitchen) is getting noisy and probably starting to go and (2) The oven door latch solenoid (used during cleaning) won’t pull-in but will hold-in once set manually (by reaching in with a screwdriver blade). No major problems yet, but I’m trying to get prepared!

I’d appreciate some know-how on how to take things apart to access the vent blower, and also the door latch solenoid.

Also would like to know if there’s such a thing as a maintenance manual for this unit in existence somewhere.

Any advice will be appreciated! Thanks,

Jim