Hi I'm John I will help you with the problem.
can you hear clicking from the oven control ?
If its clicking the relays in the control are burnt out .
If you have a meter you can check the L1 and Line 2 to bake and broil if you get 220 volt's between L1 and L2 but not at bake and broil replace the control.
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You will require a meter to check the oven control its the only way to check the control , theirs no other relay or cut off thermostat .