Microwave fans/turntable have stopped working?

I have a Panasonic NN-A574SBBPQ, which suddenly failed with a small pop sound that triggered NCD device in fusebox and killed power to my house temporarily. Device is out of warranty, so opened it up and checked fuses ...found 2, both OK. Switched back on and tried a few things ... turntable* doesn't rotate and fans don't work, but grill comes on OK andon microwave setting will warm up a cup of water.
*I disconnected the turntable motor, wired up separately and it did seem to be working.
Any ideas?