Hello Steve, my name is George,
What is the model of your Smeg Oven?.. It should be on a label at the oven opening.
Ok, that model has a fan function and a function were you can use the top & bottom element to cook...
Ok.. It depends on the setup..
Let me get a wiring diagram tomorrow and come back to you.
Is the Timer/Display fully functional and the oven set to manual?
The oven should work without the bulb, but have you replaced the bulb to see if the circuit is still there?
It wont make a difference but it will let me know if the circuit is there