The correct answer is: E. low AC outlet power.
A defective RAM (bank zero) is the most likely cause of a PC with no video. If the RAM is not working properly, the computer will not be able to access the information it needs to display on the screen. A defective microprocessor is also a possibility, but it is less likely than a defective RAM. A crashed hard drive will not cause a PC to have no video, but it will prevent the computer from accessing any files that are stored on the hard drive. A loose video card is another possibility, but it is less likely than a defective RAM or microprocessor. Low AC outlet power is the least likely cause of a PC with no video. If the AC outlet is not providing enough power, the computer may not turn on at all, but it is unlikely that it would cause the computer to have no video.
Here is a more detailed explanation of each option:
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