Carminat -TomTom screen only shows time and temp after start up?

gilmour182 Registered Users Posts: 4
Neophyte Traveler
edited January 2019 in Built in car navigation
After not driving the car for one week my Laguna Coupe's Sat Nav has decided not to work.
If The SD is removed and reinstalled the screen shows an hour glass and progress bar then a background picture but then fails to show the navigation screen. The only things shows on the screen are the Time and outside temperature, hands free calls and radio still work but have lost all displays for these items.
Please Help.