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

Repeat delay: Controls the time delay before a keystroke repeats when held down. Repeat rate: Determines the speed of repeated keystrokes. Press the Windows key, type Device Manager, and hit Enter.

If you are among the many users experiencing issues with the keyboard on your Surface Pro 9, there are several steps and methods you can follow to troubleshoot and potentially resolve the problem. One ...