I used a volt/amp meter and read the secondary winding
I have no idea on the output voltage, I just know I had none and no amp draw with unit operating.
Okay, the output voltage is about 2000 volts with an amp draw for a 1000 watt microwave to be about 550mamps just for future reference. Now if you are getting 120vac in to the transformer but nothing out when the microwave is running then you need to replace the transformer. Not very hard to replace as it is held in by 4 screws. If you replace it yourself you are looking at about $130 for the part. I am sending you a link to a diagram and the HVTransformer is 1433 on the diagram. I am here for further assistance and thank you for your time and patience, Randy.