2 left burner ignitors not working

This is a 5 burner Gallery Model. The 2 left burners NOW need a match to light. One day they worked the next they did not.

I removed (all) the black discs then the alum. color burner (2 screws in each) and cleaned so that light showed through from the igniter.

Perhaps the problem lies in the igniter module. Is this likely to be behind the rear panel? To test voltage to the igniters I wold think I need to raise the cook top. The cook top does not raise up, perhaps it has spring clips on the sides?

Thanks in advance for any assistance!