Keyboard, mouse, KVM switch or USB-device problems
Use this information to solve problems related to a keyboard, mouse, KVM switch or USB-device problems.
All or some keys on the keyboard do not work
- Make sure that: - The keyboard cable is securely connected. 
- The server and the monitor are turned on. 
 
- If you are using a USB keyboard, run the Setup Utility and enable keyboardless operation. 
- If you are using a USB keyboard and it is connected to a USB hub, disconnect the keyboard from the hub and connect it directly to the server. 
- Replace the keyboard. 
Mouse does not work
- Make sure that: - The mouse cable is securely connected to the server. 
- The mouse device drivers are installed correctly. 
- The server and the monitor are turned on. 
- The mouse option is enabled in the Setup utility. 
 
- If you are using a USB mouse and it is connected to a USB hub, disconnect the mouse from the hub and connect it directly to the server. 
- Replace the mouse. 
KVM switch problems
- Make sure that the KVM switch is supported by your server. 
- Make sure that the KVM switch is powered on correctly. 
- If the keyboard, mouse or monitor can be operated normally with direct connection to the server, then replace the KVM switch. 
USB-device does not work
- Make sure that: - The correct USB device driver is installed. 
- The operating system supports USB devices. 
 
- Make sure that the USB configuration options are set correctly. - From the Lenovo XClarity Controller management controller web interface, click . 
- If you are using a USB hub, disconnect the USB device from the hub and connect it directly to the server.