The correct answer is E. speaker.
Most PCs give a single beep on bootup to indicate they are ok hardware wise. If you boot your PC and don’t get a beep, the first thing you should check is the speaker. The speaker is a small, usually black, device that is usually located near the front of the PC. It is used to produce beeps and other sounds. If the speaker is not working, the PC will not beep when it boots up.
To check the speaker, you can try to unplug it and plug it back in. If that doesn’t work, you can try to replace it. If you are not comfortable working with electronics, you can take the PC to a technician.
The other options are also possible causes of the problem, but they are less likely. The system board is the main circuit board in the PC. The RAM is the memory in the PC. The microprocessor is the brain of the PC. The power supply provides power to the PC. If any of these components are not working, the PC may not boot up or it may not beep. However, it is more likely that the speaker is the problem.