Whirlpool WOC54EC0ASOO errors

[GreenhornDabbler]

Trying to figure out how to fix our broken Whirlpool Microwave/Oven combo Model WOC54EC0ASOO Serial # D24908088. 

The oven works fine but the microwave doesn’t heat and gives error codes F6 E0 and F1E5. 

I have run diagnostics and hired technicians. They suspect it could be the microwave magnetron or the inverter PCB. The inverter PCB is not available at this time. I would hate to see an otherwise good appliance go to landfill. 

Is the inverter PCB schematic available to diagnose and repair? If not, is there a shop somewhere that can do that?