• You may have lost connection with the USB interface. This can occur if you have exceeded the range of the TranzPort, or if the TranzPort is too close to the USB interface. Try moving closer or relocating the USB Interface. Be careful not to have large metal objects between you and the USB interface.
• The TranzPort remote has gone into sleep mode. Press any button to wake it up.
• Batteries are low. Install a fresh set of batteries.