Siemens Hb73aa.50e oven No power to display

I will try and help with this problem Siemens HB73AA550E/01

This was the closest model number I could find to your Appliance,  if you have no power going to the display then I suggest you may have a fault with either the circuit board or display  module  please see the diagrams below

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Siemens HB73AA550E/01 full list of spare parts for this model below