- Potential hardware issue
- Operating system or Logitech software settings
- Logitech Options was installed or updated on macOS Mojave 10.14 or later and user permissions have not been set. See Logitech Options permission prompts on macOS Mojave for more information.
- Manual or mode shift function does not work
- Ratched or hyper-fast mode does not work
- Check if the setting in Logitech Options for Manual shift button (Mode shift) are correctly assigned following the steps here.
- Assign a different function to the button. If it works, the problem is probably an application-specific issue. If it doesn’t work, then the problem may be due to a hardware issue.
- Verify the device or receiver is connected directly to the computer and not to a hub, extender, switch or something similar.
- Unpair/repair or disconnect/reconnect hardware.
- Upgrade the firmware if one is available.
- Windows only — try a different USB port. If it makes a difference, try updating the motherboard USB chipset driver.
- Try on a different computer.
- Windows only — if it works on a different computer, then the issue might be related to a USB chipset driver.
NOTE: If you have macOS Mojave 10.14 or later and the scroll wheel stopped working after you installed or updated Logitech Control Center update, please set the user permissions following these steps.