Did you try disabling BD Live like someone suggested on AVS Forum? Mike-tee gave you the directions on how to do it over there.
In your setup menu, go to Network and where it says BD-Live connection, select prohibit. The disks may be looking for a BD-Live connection and that may be why you keep hearing the player scanning. Keep in mind that the 1590 requires an external USB drive to access BD-Live, so if you don't have one in the player, that will cause problems with some movies. That's why I suggested disabling BD-Live, BD-Live sucks anyway.
Nothing to lose, so give it a shot. Otherwise, just see if you can exchange out the Pacific for a new set of disks. Good luck.