The Right front dual burner will only burn on the outter ring. The center burner stopped working. Is this the burner or the control? How easy is it to change the defective item?
The issue with the inner ring not working would be caused by a faulty burner. You would need to lift the cooktop out of the counter and remove the screws around the perimeter, and the burner knobs and lift the main top off. This will give access to the elements to replace.