Here is how to fix contact dealer showing on your TNS510 usually seen after picking your car up from a service where the dealer has disconnected the battery whilst doing the service.
Also seen when trying to start your car with a virtually flat battery.
When the battery is disconnected the TNS510 looses its operating system in memory, it can be reinstalled with a SD map card currently £136 in the UK
If you never had a map card in the unit or it was lost/stolen then you can get your radio etc working with this method
1, You will need a blank 4gb SD card
2, Copy the "loading.kwi" file the the card
3, Insert the card into the TNS510 and turn the ignition on first stage only (do not start the engine)
4, You will see a yellow progress bar on the screen
5, wait until its finished and your radio will spring to life again
6, If your Map SD card has become corrupt due to you trying to start the car with a flat battery, then you can use the card you made to get the TNS510 working then swap it for your original Map SD card
7, You can overwrite the Loading.kwi file in your Map SD card with the file on here to fix the Map card
David (Tarquin) from iQ forum)
