• Keyboard isn't working

• Mouse isn't working

• Mouse or keyboard frequently stops working

Keyboard isn't working

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

• Low battery level
• Moving the receiver from one USB port to another
• Moving the receiver to another computer
• Plugging the receiver into a USB hub or other unsupported device such as a KVM switch (NOTE: Your 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
  • Cell phones
  • Garage door openers

Before connecting your keyboard

1. Fix or rule out the possible issues listed above.

2. Make sure your keyboard is turned on and the battery level is good.

3. Plug the receiver directly and securely into a working USB port on your computer.

4. Turn your computer on.

Reconnecting your keyboard

1. Install the latest software from the MX800 Downloads page.

2. Launch the Logitech Unifying Software:
   

   Windows: Start > Programs > Logitech > Unifying > Logitech Unifying Software

   Windows 8: Start screen > Logitech Unifying Software

3. Click Next at the bottom of the Welcome screen.

   

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

   

5. When your keyboard is detected, you'll see a confirmation message. If you can type in the testing box, select Yes and then click Next. Otherwise, repeat from step #4.

   

6. Click Finish to exit the Logitech Unifying Software. Your keyboard should now be connected.

NOTE: The K800 keyboard is included in the Wireless Performance Combo MX800.

Mouse isn't working

If your mouse isn't working, the problem is likely a lost connection. The connection between the mouse and Unifying receiver can be lost for several reasons, such as:

• Low battery level
• Moving the receiver from one USB port to another
• Moving the receiver to another computer
• Plugging the receiver into a USB hub or other unsupported device such as a KVM switch (NOTE: Your Unifying receiver must be plugged directly into your computer.)
• Using your wireless mouse on metal surfaces
• Radio frequency (RF) interference from more powerful devices such as:
  • Wireless speakers
  • Computer power supplies
  • Monitors
  • Cell phones
  • Garage door openers

Before reconnecting your mouse

1. Fix or rule out the possible issues listed above.

2. Make sure your mouse is turned on and the battery level is good.

   

3. Plug the receiver directly and securely into a working USB port on your computer.

4. Turn your computer on.

Reconnecting your mouse

1. Install the latest software from the MK800 Downloads page.

2. Launch the Logitech Unifying Software:

   Windows: Start > Programs > Logitech > Unifying > Logitech Unifying Software

   Windows 8: Start screen > Logitech Unifying Software

3. Click Next at the bottom of the Welcome screen.

   

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

   

5. When your mouse is detected, you'll see the confirmation message below. Click Yes and then Next. Otherwise, repeat from step #4.

   

6. Click Finish to exit the Logitech Unifying Software. Your mouse should now be connected.

NOTE: The Performance Mouse MX is included in the Wireless Performance Combo MX800.

Mouse or keyboard frequently stops working

• Keep other electrical devices at least 8 inches (20 cm) away from the Unifying receiver
• Move the mouse or keyboard closer to the Unifying receiver
• Move the receiver to a different USB port on your computer