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I can get you the security code from honda if you want to enter it and see if it will unlock. It might have an internal problem if it showed up randomly, but it's worth a try. To get the unlock code I will need the serial number from the navigation unit. The navigation system serial number label is located on the control unit. This is where the removable DVD is stored. I will then need the complete VIN.
No, it should be on the front of the unit near the DVD slot, if it's not then your only option is to run it to the dealer to have them hook up a scan tool and pull the code directly from the navigation unit's computer.