Lenovo 51J0155 User Manual page 16

Problem: The keyboard does not function properly.
Solution: Check if the keyboard cable is firmly connected to the USB port, or reconnect the keyboard
cable to another USB port on your computer.
To reconnect the keyboard cable to another USB port on the computer, do the following:
1. Unplug the keyboard cable from the USB port.
2. Insert the keyboard cable into another USB port on the computer.
3. The operating system will identify the keyboard and the smart card reader.
Note: Contact your Lenovo service representative if the problem persists.
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Lenovo USB Smartcard Keyboard User Guide