This problem is likely to be a lost connection. The connection between the N305 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 wireless number pad 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 number pad.

Before Connecting your N305:

1. Make sure you have fresh batteries in your N305. For battery replacement instructions, please see Knowledge Base article 360023390453.

2. Make sure your number pad is turned on. For instructions on turning your number pad on and off, please see Knowledge Base article 360023390453.

3. Make sure the USB receiver is directly and securely plugged into a working USB port on your computer.

4. Turn your computer on.

5. Follow the process below to re-connect your number pad.

Re-connecting your N305:

To re-connect your N305, do the following:

1. Download the correct version of Mouse and Keyboard software (SetPoint) from the N305 Downloads Page.

2. Launch the Logitech Unifying Software (Start > Programs > Logitech > Unifying > Logitech Unifying Software).

3. The Logitech Unifying Software Welcome screen will appear (shown below). Click Next to continue.

   

4. Follow the on-screen instructions to turn your N305 off then on:

   

5. When your N305 is detected, you will see a confirmation message as shown below. Type a test message in the provided field to verify the number pad is working.

   

6. Once you have confirmed the number pad is working, check Yes, then click Next to continue.

7. Click Finish to exit the Logitech Unifying Software. Your N305 should now be connected.

Additional Information:

If the above solutions do not resolve your problem, consult Knowledge Base article 14151 for instructions on contacting Logitech Technical Support.