@RDesikan
I have two 765s. One shows the map immediately on booting, the other takes some minutes like yours does but otherwise works fine. Loading maps occurs as the unit boots and it will then default to your last known position on the map screen before a sat lock is made. Placing the unit in simulation mode works to force my tardy unit to immediately display the detail map properly and then by immediately turning the simulator back off the map's still shown regardless of a sat lock.
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