I am afraid that as I am about to set off to drive to France on hols, & have no smart phone or know where I will be able to get wifi, that I have taken you as far as I can with this problem. If you are getting no supply to the elements in the previous suggestion, then it would appear that either the input to the control board from the ntc sensors is missing or the board is faulty. You could try the following procedure to reset the board in diagnostic mode, but that is about all I can offer. Hopefully someone else will be along to continue guiding you or you could repost with a link to this thread. Good luck.
Turn the dial to off.
Turn the dial to 6 o'clock.
Push the start button 3 times.
Turn the dial 1 click clockwise.
Push the start button 3 times.
.
You have to complete this within 10 seconds to reset the control board
Turn the dial to off.
Turn the dial to 6 o'clock.
Push the start button 3 times.
Turn the dial 1 click clockwise.
Push the start button 3 times.
.
You have to complete this within 10 seconds to reset the control board