Hi, my Go Premium continuously shuts down and restarts. This is whether or not a journey is entered. Frankly it is not much use but wonder if there is a firmware or other issue that can rectify this. I have rebooted it (holding down the start button until it goes to the device details screen and then restarts) several times but that hasn't fixed it. Has it reached the end of its toime or can it be fixed? Hoping for the latter and many thanks in advance for your helpful suggestions.