i bought this unit from a friend,worked finr when he had it.
had it installed in my truck and now it wont navigate,the gps doesnt seem to respond.
he had the bypass mod done.when i hd it installed the bypass was undone.
any ideas,when i go to the gps screen i get three blinking bars at the bottom,the antenna is installed on the roof of my f-150.
any help is appreciated.