i have a new 2002 tour w/nav only one week and 450 miles just noticed the other day i lost my arrow for north direction and have an icon pointing up with an letter n in it. doesn't move anymore stays stable. at same time noticed i can't map and previos addresses it will show a non-moving screen of location but no directions or voice commands. it will map a new address and talk and map with visual directions, but once it maps the first time when i go into previous address it will not map a second time. it automatically takes a new address and makes it a previous once mapped. can't remap on previous wherever my location is. is there a way to reboot the system or re-set the system. i think also my location is a little off from prior to this problem any idea's or did anyone with 2001 model have this problem? any input appreciated