Bulbs blew, now no turntable or fan

The bulbs underneath unit blew (now replaced) but the microwave fan, turntable, bulbs underneath don’t work. The bulb inside unit works only if the door is opened, stays off if trying to m/w something. I found a fuse with wire connectors made right onto it and checked for continuity, seems O.K. Now what? Everything had worked fine until I tried to turn on the light!!