my TomTom Mazda Navigation System NB1 system "freezes up" and has the message "Looking for a GPS signal" I took it to the deal I bought the car. They first told me that I would have to pay $115.00 diagnostic fee. They looked at the car and then told me that it needed to be rebouted and told me how to do it myself. I used the car to go home and the system worked. Then went to a store, where it did the same thing again. I called the dealer and I have to wait until Monday to come in again. I updated the card with all of the updates, and put the card back into the car, started it up. The system updated the maps, etc but then, when it the map came up, the same message appeared. Is there anything I can do before I go back to the dealer?