How to Fault find GPS

1. Make sure that the SMA connections is not too tight. This is a common occurrence.

2. Make sure you are not in an undercover area and that the GPS dongle is not being interfered with metal.

3. Swipe down and select "Reboot" to see if it clears the fault

4. Make sure you are running the latest firmware

5. Use a multimeter to measure the voltage value at the center point of the GPS antenna interface. If there is 3.3V, it proves that there is no problem with the navigation host hardware