Kenwood KNA-G510 GPS Receiver "kvt reset" Questions

...kvt-819dvd allso with the kna-g510 and my navigation will not come on it says navigation on the screen but its blank screen i took the unit back to the shop that installed it...they disconnected all ...

...KVT-717DVD,WHEN YOUR UNIT ASK FOR THE CODE,GET THE REMOTE CONTROL AND POIN IT TO THE SCREEN AND PRESS THE FOLLOWING NUMBERS THE FASTER YOU CAN: 552222777 (KCAR) IF YOU MAKE A MISTAKE PRESS ANY OTHER ...

...KVT-815DVD for over two years and no problems. Until last Friday 10/6/06 the navigation went crazy. All of a sudden the gps could not keep track of the current position, or if I was stopped at an ...