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Try the following: - Make sure your CX6400 is turned on and securely connected to your computer or USB hub.
- If your your CX6400 is connected to a USB hub, make sure it’s connected to a first tier hub. The first tier hub is the hub closest to the host computer when more than one hub is connected to the computer.
- Check to make sure no lights are flashing on the device. You cannot scan when any light is flashing.
- Try restarting your computer.
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