Getting Started Guide
Page 15
Try moving the keyboard and mouse closer to the Unifying receiver, or plug the Unifying receiver into the receiver extender cable to bring it closer to turn on the ... power of each device. (See Battery management for more information.) On the mouse bottom, slide the On/Off switch right to the keyboard and mouse. Check battery installation. Logitech® Wireless Combo MK520 Troubleshooting Keyboard and mouse are not working Check the USB connection. The Battery LED on the mouse. Also, try changing USB ports.
Try moving the keyboard and mouse closer to the Unifying receiver, or plug the Unifying receiver into the receiver extender cable to bring it closer to turn on the ... power of each device. (See Battery management for more information.) On the mouse bottom, slide the On/Off switch right to the keyboard and mouse. Check battery installation. Logitech® Wireless Combo MK520 Troubleshooting Keyboard and mouse are not working Check the USB connection. The Battery LED on the mouse. Also, try changing USB ports.