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The correct answer is C.

OBJ-5.4: The inverter (also known as inverter board, screen inverter, or LCD inverter) is a part of the laptop’s display assembly. The inverter is a small green board attached to the base of the LCD panel. In a laptop computer, the LCD screen relies on a backlight source to uniformly light up the screen, and the inverter acts as the power supply for this lighting source. If the inverter is faulty, the display will be too dim to easily see without an external light source like a flashlight. The digitizer is a touch-sensitive glass panel covering the LCD in a touchscreen assembly. The digitizer is used to convert touch events to digital signals that can be interpreted as different types of input. A liquid crystal display (LCD) panel is a type of display technology where the image is made up of liquid crystal cells controlled using electrical charges. The LCD panel is backlight by a cold cathode fluorescent (CCFL) bulb. A graphics processing unit (GPU) is a microprocessor used on dedicated video adapter cards or within a CPU with integrated graphics capability to handle the mathematical calculations required to create immersive and 3D graphics.

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