Answer:
The "caps lock " key is the key sandy should press on the keyboard to check for proper connection.
Step-by-step explanation:
The "caps lock" has a display light on the keyboard and this light is displayed whenever you press the key. the reason for the caps lock key is to enable the user to input capital letters into the document he or she is typing.
If the light doesn't come on it signals that there is either a wrong connection between the keyboard and the CPU which is usually a hardware issue or it could be that the keyboard buttons are bad.
It could also be caused by a wrong software installation procedure while setting up the keyboard to work with the computer. or that the keyboard is not suitable for the system. these are the possible causes of a keyboard not inputting data into the computer.