This seems to take a long time (60 seconds at least). Once the pre boot mode message disappears release the power button and your device will perform some activities to recover from the above problem.
Apparently this sequence will only work with the above error.
You buy a micro/SD card preloaded with the Ireland/UK maps, you insert it into the side of your device and off you go.
Hello All, I recently downloaded the Nuvi 660 firmware upgrade from the Garmin site to upgrade to v2.70.
I did this as I read some other comments that the Garmin webupdater application has (in some cases) caused corruption.
Garmin provides the free Web Updater application for updating your GPS.
Web Updater installs software updates on the nuvi 250 that may fix problems or improve the device's functionality. Connect the nuvi 250 to your computer via the supplied USB cable.