Download FW for your nuvi from here:
[Only registered and activated users can see links. Click Here To Register...]
Then run garmun cure tool and create file for repair - Completed
click on updater.exe on cure tool window - Completed
put your finger in top left corner on your nuvi screen and hold finger on this place - Completed
with other hand connect nuci to PC - Completed
Now in updater.exe window you see nuvi 1310 and your ID - Completed
Click on USB beside 1310 and ID and click OK - Completed
And updater.exe start working. - Completed
When procedure end your nuvi will conect to PC like before error. - Completed
Now format your nuvi to FAT32 - Now how is this done???
When your done create original FW with cure tool and flash again in preboot mode.
if you need backup file for 13xx i can send it to you.