Before buying a computer, you can use this website to test its sound, keyboard, microphone, and camera
It is undeniable that when you want to buy a computer, you always search for a used one because it is much less expensive than new ones. However, because it is used, it usually has some flaws, and the owner may have sold it because he saw one. The microphone and camera are the most crucial components of the computer, and if either fails, the result will be catastrophic. Pay close attention to the entire explanation if you are planning to purchase a used computer.
You must first visit the onlinemictest website, which you can access by clicking the link at the bottom of this post. It will ask you to grant it access to the microphone if you enter it directly. If you let it, you will need to talk or make a sound. Then a line will show up. In the event that it is straight, the microphone is malfunctioning. A continuously moving line indicates that the microphone is operating as intended.
To check your camera, sound, keyboard, and flash, go to Tools and select Cam Test. This will quickly check your computer's camera. This also holds true for the other items that were mentioned.
Website link: onlinemictest