: A hidden screen will appear. Select the only active button to display a 16-digit ERC code. Generate Unlock Code : This code can be entered into an ERC Calculator to receive a password that permanently unlocks the unit. Hardware Reset Options Nddn-w57 Reset - Google Groups
This method reinstalls the base operating software, essentially performing a factory reset. It is required when the unit is completely locked on an error screen and won't respond. nddn-w57 reset