Question 73Electricity & Electronics - 1st Asst/Chief

The correct answer is B) no illumination. A burned-out LED will not emit any light, resulting in no illumination. This is because the LED has essentially failed and can no longer convert electrical current into light. The other options are incorrect - excessive illumination (A) would indicate a problem with the power supply or circuit, excessive output (C) is not a symptom of a burned-out LED, and a slight glow in the crystal (D) is not a typical indication of a failed LED.