If its a V1, it will be stuck on the load a map screen if its unmarried.
you didn't fully read the manual.
"The AccessPORT has to be installed (married) before the Main Menu will be
displayed. To bypass this requirement, you will need to hold the UP and DOWN
arrow buttons at the same time while powering the AccessPORT on. After a few
seconds, the “Sync to PC” message will appear on the screen. Once you have
received that screen, you can stop holding the UP and DOWN buttons. "
Hold the buttons then plug in the power cord. then swap/add some maps. then flash your car.