• K350 Keyboard
• M510 Mouse

If your keyboard isn't working, the problem is likely to be a lost connection. The connection between the keyboard and the USB receiver can be lost for several reasons, including:

• Low battery charge
• Moving the USB receiver from one USB port to another
• Moving the USB receiver to another computer
• Plugging the USB receiver into a USB hub, KVM switch or other unsupported device. (NOTE: Your USB receiver must be plugged directly into your computer.)
• Using your wireless keyboard on metal surfaces
• Radio frequency (RF) interference from other sources, such as:
  • Wireless speakers
  • Computer power supplies
  • Monitors
  • Cellular telephones
  • Garage door openers

Try to rule out any of these problem sources that might be affecting your keyboard.

Before reconnecting your MK550 Keyboard

Before you connect your keyboard again:

1. Make sure you have fresh batteries in your keyboard. For battery replacement instructions, see Knowledge Base article 360023218854.
2. Make sure your keyboard is turned on. For instructions on turning your keyboard on and off, see Knowledge Base article 360023218854.
3. Make sure the USB receiver is securely plugged directly into a working USB port on your computer.
4. Turn your computer on.

Follow the process below to reconnect your keyboard.

Reconnecting your MK550 Keyboard

To reconnect your keyboard:

1. Download the correct version of Logitech SetPoint Mouse and Keyboard Software from the MK550 Downloads Page.
2. Launch the Logitech Unifying Software.Start > Programs > Logitech > Unifying > Logitech Unifying Software
3. When the Logitech Unifying Software welcome screen displays (shown below), click Next to continue.

   

4. Follow the on-screen instructions to turn your keyboard off and then back on.

   

   When your keyboard is detected, you'll see this confirmation message:

   

   NOTE: The mouse version number shown above is correct. Your MK550 Desktop comes with a K350 Keyboard and an M510 Mouse.

5. Type a test message in the text field to verify the keyboard is working.
6. Once you've confirmed the keyboard is working, choose "Yes" then click Next to continue.
7. Click Finish to exit the Logitech Unifying Software. Your keyboard should now be connected.

Additional information

If you're still having the same issue, see Knowledge Base article 18194 for how to contact Logitech Technical Support about this product.