Greetings and thank you for your message. We recommend trying the following button sequence to attempt to Cold Reset the unit back to clear certain data without initializing personal information and some operation data to allow access to the factory reset and Initialize the system through the menu:
Make sure that the unit is ON
Touch the [POWER] touch key and [VOL –] touch key on the main unit simultaneously for 5 seconds.
The message “WAIT” appears and then “RESET” appears on the fluorescent indicator tube and then it should go to standby.
Test the unit for functionality
If you are able to access the menu reset the unit back to factory default settings and initialize personal information:
Select RESET TO FACTORY DEFAULT SETTINGS and then ALL SETTINGS.
Go back to menu and select INITILIZE PERSONAL INFORMATION.
After following the previous suggested options, if the unit is still not responding it will be necessary to check the service options available on your area by following the next link: