Hello & Welcome to Just Answer,
Sorry to hear of any issue you are having with your device.
To help you with this issue, may I ask:
1) Have you checked the Map Info screen - in the device? If so, can you tell me EXACTLY what you see on that screen?
2) WHERE is the address you are trying to enter - relative to your current location?
3) WHERE is your current location (city & state is fine), and do you see DETAILED maps of your current location - when you go directly to the View Map screen?