Some keys on the keyboard are not working

Probable CausePossible Solution
The keyboard cable is not connected.

Connect the cable to the keyboard, and then connect the keyboard cable to the keyboard port of the POS terminal.

The keyboard is configured incorrectly.Reconfigure the keyboard through the configuration software.
The keyboard is “hot–plugged” into the POS terminal while the POS terminal is powered on.Reboot the system.
The keyboard is defective.

Call for service.