If your keyboard keys stop working, it doesn't necessarily mean they're broken or need replacement. From checking keyboard ...

If your laptop has a non-removable battery ... reinstall your keyboard or mouse driver Rolling back the keyboard or mouse driver will install the previous driver version. This can fix the issue ...

If you are planning to use this with the Burmese keyboard on your computer, make sure you know how to use it properly. Follow the steps to install Windows 10 Burmese keyboard. Open Settings ...

you'll be able to see which app you need to control the lighting and download it. It's straightforward to change keyboard color settings from here. Open the downloaded control app for your laptop ...