Troubleshooting

Keyboard and mouse are not working

Check the USB connection. Also, try changing USB ports.
Move closer? Try moving the keyboard and mouse closer to the Unifying receiver.
Check battery installation. Also check the battery power of each device.
(See Battery management for more information.)
On the mouse bottom, slide the On/O switch right to turn on
the mouse. The Battery LED on the mouse top case should light green
for 10 seconds. (See Battery management for more information.)
8 8
M620
M620
Mouse bottom
On/O switch
Logitech Wireless Combo MK620
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