Solved: keyboard key NOT working

The easy way to solve this problem is to use hotkey e.g. if your key "n" is broken, you may use Ctrl+m to simulate lower "n" and Ctrl+shift+m to assume capital "N".

To make this done, you can use a tool called "AutoHotkey" where you can download by downloading it from the link below.
https://www.autohotkey.com/download/

After installed, you can follow the documentation.