How to fix any Laptop Keyboard that stops Working

I faced keyboard not Working issue on my laptop today and I was able to fix that by following the steps below.

1. Turn off the laptop 
2. Remove AC power if plugged. 
3. Press and Hold the Power button for more than 60 seconds. 
4. Then, Start the Laptop as Usual. Hope this will help you.

Then you don't want to replace your keyboard. As my point of view, this is a common issue and not a hardware fault.