T.5.9 USB transfer cable is not recognized

Is the USB transfer cable connected?

Cause

The USB transfer cable may not have been correctly connected.

Solution

Reconnect the USB transfer cable or reboot the PC. Connect the USB transfer cable directly to the USB port, not to a USB hub.

Is a USB hub used?

Cause

Electric power from the USB hub may not have been sufficient.

Solution

Use a powered USB hub. Or connect the USB transfer cable directly to the USB port. Also, check if the powered USB hub complies with Universal Serial Bus 1.1 or later.

Does the Device Manager show a question mark "?" Exclamation mark "!"

Cause

The USB driver may not have been installed properly.

Solution

Uninstall and then reinstall the USB driver.

Refer to the following section for the installation method.

T.2.3.2 Is the driver for the USB cable installed?