A laptop boots up but the screen appears dark even during the power-on self test (POST) except when viewed from an angle. Adjusting the brightness and contrast has not resolved the problem. Which of the following is MOST likely the cause?

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A laptop boots up but the screen appears dark even during the power-on self test (POST) except when viewed from an angle. Adjusting the brightness and contrast has not resolved the problem. Which of the following is MOST likely the cause?