There are two lines of power into your oven. L1 and L2. Both lines need to make their way to the element for it to function. What you need to do is determine where you are losing power. The easiest place to start is the control board. Open it up, disconnect the broiler wire from the relay (yellow I believe) and put the unit into broil. Probe the relay where the wire was disconnected and ground. You should have 120vac coming out of the relay. If you do not, but bake still works, you need a new board. Be careful when doing this test as the wiring is powered. Disconnect power before taking it apart and only power on for the voltage test, then disconnect again. Repost and let us know what you come up with please. Thanks!