I have a Nuvi 1300, where I changed the firmware (5.80) back in 2012 to include junction view and lane assist and updated with the North American NT 2012.20 maps. All has been working fine for the past 2 years.

I unlocked and loaded the new North American NT 2014.40 maps and upgraded the firmware to 6.20, based on the sticky saying it was OK to do so.

Now, the maps can be seen in the sys info page, but will not load. I verified both the mapset and the img are both unlocked, but the nuvi still will not read them.

Can someone please help before I go to the last resort of loading a cure and putting back to 5.80?

I'm not sure if something changed in the maps, or if there is something new in the 6.20 firmware thats blocking the maps from loading