Transferring maps between old and new devices

blackhatphil Registered Users Posts: 7
Apprentice Traveler
edited January 2019 in RIDER
Have a broken Rider 400 with maps on it which naturally I have paid for.
The device is not repairable and I can't afford a new one, so I am looking for another 2nd hand 400.

Assuming I find one, how can I get the maps on to it?

It is probably worth stating that when I connect my old 400 to my computer, nothing happens. Neither on the TomTom or the Mac! There is no way to factory reset the TomTom as the screen is totally unresponsive.