Keyboards
This happened to me when I was using my old computer. Now there are several ways on how to make a quick-fix if your keyboard is not working. Check the plug if it’s connected securely. Unplug and plug just to be sure. Re-boot your computer and if while doing so, the machine makes a beeping noise, then the keyboard is still not working. Check the indicator on the keyboard if it’s lit up, try to press the locks (number lock, caps lock etc.), if it doesn’t work, then the keyboard itself may be the problem and have to be replaced.