The computer does not recognize your “WALKMAN” even if connected by USB cable.

The USB cable is not connected to a USB connector on your computer properly.

• Disconnect the USB cable, and then reconnect it.

• Use the supplied USB cable.

USB debugging is enabled.

• Some devices or software may not recognize your “WALKMAN” when USB debugging is enabled. Tap the (Menu) button, then tap [ Settings] - [ Applications] - [Development] - [USB debugging] and uncheck the box.

A USB hub is being used.

• Your “WALKMAN” may not be recognized by the computer if using a USB hub. Connect your “WALKMAN” directly to the computer’s USB port.

The USB connector on your computer may have a problem.

• Connect your “WALKMAN” to another USB connector on your computer.

When you use your “WALKMAN” for the first time, or when the battery is low, the battery mark may display and you may not be able to use your “WALKMAN.” This is not a malfunction. Wait for about 10 minutes before attempting operations.

Software authentication may take some time. Wait for a while.

Software installation failed.

• Reinstall the software using the installer. Imported data will remain unchanged.

If the problem still persists after performing the remedies above, press the RESET button to reset your “WALKMAN.” [Details]