I think the manual is wrong. I move the selectors to align, then after they are ready I put them into Nav at which time the three start to blink. Then I open the CDU to the position page, enter the airport and gate #, then put the gate position into the empty present location field. That stops the nav lights from blinking and all is well. After that I select the flight plan etc. I really like 4.3. Seems to have addressed many of the little problems I had.

Dennis