Do you own a meter that you can use to do some electrical testing?

[COLOR="Red"]First, disconnect the power and discharge the capacitor by shorting across the terminals[/COLOR].You'll need to see if the main circuit board is sending 120VAC to the power transformer. To do this, first disconnect the output from the transformer to the capacitor. Select a cooking cycle and start it. If you don't get 120VAC to the transformer, the problem is in the control board. Be very careful: You're sticking hands and instruments in the proximity of lethal voltage!If you DO find the correct voltage; since you have already replaced the other major high-voltage components, the transformer is the next logical replacement.