Right i have managed to sort it now by forcing it into update mode so i am all good now. I even took the head unit back out and rotated it to see if i could press a button that i could see just below the screen but that didnt help.
It was fine before i installed endpoint on it, some part of the setup went wrong on my part . but it is all good now. It would be useful if the lock had a longer timer on it with an option to press to press a button to unlock it on the actual device as that would have saved me a whole bunch of hassle .