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:
- Defective RAM (bank zero): RAM is a type of memory that stores information that the computer needs to access quickly. If the RAM is not working properly, the computer will not be able to access the information it needs to display on the screen. This can cause the computer to have no video.
- Defective microprocessor: The microprocessor is the “brain” of the computer. It is responsible for carrying out instructions and processing data. If the microprocessor is not working properly, the computer will not be able to function properly. This can cause the computer to have no video.
- Crashed hard drive: The hard drive is where the computer stores its files. If the hard drive crashes, the computer will not be able to access any of its files. This can cause the computer to have no video.
- Loose video card: The video card is responsible for displaying images on the screen. If the video card is not properly connected to the computer, it may not be able to display images. This can cause the computer to have no video.
- Low AC outlet power: The AC outlet is where the computer plugs into the wall. If the AC outlet is not providing enough power, the computer may not turn on at all. However, it is unlikely that low AC outlet power would cause the computer to have no video.