The correct answer is: A. Defect in the computers video circuitry
The monitor power LED is ‘on’ but the monitor screen is completely dark. This means that the monitor is receiving power, but the video signal is not being transmitted to the monitor. The most likely cause of this problem is a disconnected video cable. Other possible causes include a defective monitor, a system RAM problem, or a defect in the computer’s video circuitry. However, the least likely cause is a defect in the computer’s video circuitry. This is because the monitor power LED is on, which indicates that the computer is powering the monitor. If the computer’s video circuitry were defective, the monitor would not receive power and the monitor power LED would be off.
Here is a brief explanation of each option:
- A. Defect in the computers video circuitry
A defect in the computer’s video circuitry is the least likely cause of the problem because the monitor power LED is on. This indicates that the computer is powering the monitor. If the computer’s video circuitry were defective, the monitor would not receive power and the monitor power LED would be off.
- B. Disconnected video cable
A disconnected video cable is the most likely cause of the problem. This is because the monitor power LED is on, which indicates that the computer is powering the monitor. However, the monitor screen is completely dark, which indicates that the video signal is not being transmitted to the monitor. The most likely reason for this is that the video cable is disconnected.
- C. Defective monitor
A defective monitor is a possible cause of the problem. However, it is less likely than a disconnected video cable because the monitor power LED is on. This indicates that the monitor is receiving power. If the monitor were defective, the monitor power LED would be off.
- D. System RAM problem
A system RAM problem is a possible cause of the problem. However, it is less likely than a disconnected video cable or a defective monitor because the monitor power LED is on. This indicates that the computer is powering the monitor. If the computer had a system RAM problem, the monitor would not receive power and the monitor power LED would be off.
- E. None of the above
The answer is not “None of the above” because a disconnected video cable is the most likely cause of the problem.