Is your GPS screwed? Is the map on an SD card? Do you have a copy of the map/card?
You could backup the device/card and then try formatting if you think the copy is ok. You can also download the base files required for an 800/810 and then put your own stuff back in manually.
Is your GPS screwed? Is the map on an SD card? Do you have a copy of the map/card?
You could backup the device/card and then try formatting if you think the copy is ok. You can also download the base files required for an 800/810 and then put your own stuff back in manually.