This problem is likely to be a lost connection. The connection between the mouse and the USB receiver or the keyboard and the USB receiver can be lost due to several reasons such as:

• Low batteries
• 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 or other unsupported device such as a KVM switch (your USB receiver must be plugged directly into your computer)
• Using your cordless mouse/keyboard on metal surfaces
• Radio frequency (RF) interference of more powerful wireless devices such as:
  • Wireless speakers
  • Computer power supplies
  • Monitors
  • Cellular telephones
  • Garage door openers

Eliminate any problem sources mentioned above that might be affecting your devices.

Before connecting your S 510:

1. Make sure you have fresh batteries in both your mouse and keyboard.

2. Make sure the mouse is turned on. The power indicator on the bottom of the mouse should be green. If the power indicator is not lit, press and hold the black power button on the bottom of the mouse until the power indicator is green.

   Power Indicator

   
   

3. Make sure you have properly connected the S 510 receiver to your computer.

   • One cable is used for computers with a USB port,
   • Both cables are used for computers with PS/2 ports.

   Note: When connecting to a computer with a USB port, the Green cable is unused and should not be connected. See also Knowledge Base article 360023212054.

4. Turn your computer on.

5. Follow the procedures below to reconnect your keyboard or mouse.

   • Connecting the Mouse.
   • Connecting the Keyboard.

Connecting the Mouse

1. Press and release the black connect button on the top of the receiver. The green LEDs on the receiver will blink one after the other. This will broadcast a signal to your mouse. This broadcast will last only a few seconds, so you must perform the next step quickly.

2. Quickly press the red connect button on the bottom of the mouse for 1 second, then release it. The power indicator will flash briefly and then turn green. The mouse is now connected to the receiver.

3. Verify the mouse is functioning correctly. If it is not working repeat the above steps.

Connecting the Keyboard

1. Press and release the black connect button on the top of the receiver. The green LEDs on the receiver will blink one after the other. This will broadcast a signal to your keyboard. This broadcast will last only a few seconds, so you must perform the next step quickly.

2. Quickly press the red connect button on the bottom of the keyboard for 1 second, then release it. The keyboard is now connected to the receiver.

3. Verify the keyboard is functioning correctly. If it is not working repeat the above steps.