This problem is likely to be a lost connection. The connection between the mouse and the USB nano-receiver can be lost due to several reasons, including:

• Low batteries
• Moving the USB nano-receiver from one USB port to another
• Moving the USB nano-receiver to another computer
• Plugging the USB nano-receiver into a USB hub or other unsupported device such as a KVM switch (your USB nano-receiver must be plugged directly into your computer)
• Using your cordless mouse 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 M305:

1. Turn your computer on.

2. Insert a fresh battery in your mouse. For instructions on changing your mouse battery, see Knowledge Base article 360023220014.

3. Make sure the mouse is turned on. Move the power switch on the bottom of the mouse to ON position so the power indicator turns green.

   

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

5. To re-connect your M305 mouse, please choose your operating system from the options below:

   • Windows
   • Macintosh

Windows:

To reconnect your M305 to a Windows computer, do the following:

1. Download the correct version of Mouse and Keyboard software (SetPoint) from the M305 Downloads Page.

2. Using the keyboard, press the Windows key and arrow up to Run, then press Enter.

       

3. Type C:\Program Files\Logitech\SetPoint\Connect.exe

4. Press Enter.

5. Follow the instructions displayed in the following window:

   

6. The mouse should be re-connected within a few seconds. If the connection is not confirmed within 30 seconds, the utility will ask you to perform the procedure again.

   

7. If the mouse works, click on Done to exit the Re-connection Utility window.

8. If the mouse still fails to connect after several tries, reboot the system and try the process again.

9. If the above solutions do not resolve your problem, consult Knowledge Base article 12127 for instructions on contacting Logitech Technical Support.

Macintosh:

To re-connect your M305 to a Macintosh computer, do the following:

1. Download the correct version of Logitech Control Center software (LCC) from the M305 Downloads Page.

2. Open a new Finder window (Command + N).

3. Use arrows to go to Applications > Utilities > LCC Connection Utility.

4. Highlight the LCC Connection Utility and press Command + O.

5. Follow the instructions displayed in the following window:

   

6. The mouse should be re-connected within a few seconds. If the connection is not confirmed within 30 seconds, the utility will ask you to perform the procedure again.

   

7. If the mouse works, click on Done to exit the LCC Connection Utility window.

8. If the mouse still fails to connect after several tries, reboot the system and try the process again.

9. If the above solutions do not resolve your problem, consult Knowledge Base article 12127 for instructions on contacting Logitech Technical Support.