I read somewhere in this forum that someone here has problem with map error.
Found this information in another forum that might help to resolve the problem he is facing. Hope it helps.
nuvi has service mode (called PRE BOOT MODE) in which unit stays operable for some functions, such as firmware recovery.
To access this mode hold POWER and do not release it.
g7towin can access unit this mode and read/write some data (almanach, time, versions...)
Mapsource CAN NOT write maps in this mode, cause of nuvi limited capabilities. The main way to access maps - use USB Mass Storage Device Mode.
You can not revert firmware to older version using gupdate.gcd method.
Both files for service firmware 2.60 have right CRC and available to download.
Problems, that service firmware can solve:
1. After I put the world map as gmapsupp under /Garmin folder, the nuvi stocked on loading maps bar. Is there anybody now how to recover it? Now I even can not enter the USB storage mode.
Answer: You have to start your device to have disks. OK.
The main idea - to start the device and delete these gmapsupp.img wrong file. (or another "bad map" file img). How to do it if the unit does not start?
Let's use the updater, PRE-BOOT mode and some modified self-made service firmware.
http://e-trex.info/fw/nuvi/2xx/fw_nuvi2 ... isible.rar
Unpack this file and start the device in the pre-boot mode. (hold the POWER button until the LOADER message appears) Pay attention that PRE-BOOT mode string is not displayed by 2xx nuvi, but other version such as 3xx and 6xx display it.
Attach the device usb.
Run updater and select nuvi.
Click ok and proceed. Agree with updater if any additional messages appeared.
If LOADER appeared on the screen you may release POWER button and wait until unit flashed.
After success flashing unit restarts. (if you used WebUpdater before - gupdate.gcd needs to be deleted too! because of unit automatic firmware update after boot if this file exists, now it is no need in it, we will made it manually)
Now unit should boot! And there is only basemap shown (no gmapsupp, no gmapprom, gmapprom1 visible).
And now you can attach it as a Mass Storage Device and DELETE wrong gmapsupp (or whatever you need).
Then you need to make flash for usual firmware for unit. I prefer usual firmware loaded in PRE-BOOT mode, I hate gupdate.gcd
So, download the file
and use it as I described above.
Now your nuvi is fully operational and have no "bad maps".
2. After days passed my unit writed : SOFTWARE MISSING. How to recover it?
Answer: Use recovery method from the 1 question and the
It recovers your unit and gives access to disks. So, you can use WebUpdater or another manual method to upgrade software version then.
3. How can I revert to an older version of the firmware?
Answer: Use http://e-trex.info/fw/nuvi/2xx/fw_nuvi2xx_en_v260.rar
file and then upgrade to the necessary version. It does not revert GPS Chipset Version, XLOADER version, BootBlock version. If your unit had older version XLOADER than 0.68 it will be upgraded to 0.68, and if BootBlock had older version than 2.90 it will be upgraded too. I can make original versions for then (such as appeared in original 2.60 unit), but I have no time for it, sorry.
Warninig! All your user data will be lost. Maps, files and unlocks should remain unchanged.