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a rebooting unit will most likely not be resolved by a reset. The problem is usually caused by a failed firmware or map upgrade. When the unit boots and can not find certain files or they are corrupted, the unit crashes. The unit must be flashed with a service firmware to gain access to the units flash drive so that the corrupted files can be replaced. Once access to the flash drive is obtained, the favorites can be backed up as well. Once the files are restored, then the unit can be flashed again with the factory standard firmware. More info can be found here:
Unfortunately, there isn't an easy solution for the Nuvi owner as it requires a custom piece of firmware to flash the unit to make it at least boot. This problem is often caused during a failed firmware and/or map update.
It sounds like a file was corrupted. Sometimes it is better to connect the unit
up to a PC, delete the old map and then proceed to install the new one. There
are so many issues with memory space causing failed downloads and corrupted
If the map file is missing, the unit will boot-up OK, it will just
say "Map data unavailable" but if the map file or associated map files are
corrupted, it can cause the unit to crash. Your PC won't recognize the Nuvi
because you have the reach the main screen before the data communication mode
routines are accessed.
We've had some success in restoring some of these
units by flashing a "fix" firmware in "pre-boot mode" that doesn't try to load
the map or map associated files. This should then allow the unit to boot. Once
the unit boots, Windows will recognize it and then you can copy a map over to it
from the PC. Reboot the unit and then flash it with the standard
Your unit most likely has a firmware error, which could be due to a corrupt file. To solve it you yourself can try to update the firmware when connecting to the pc, if the unit cannot stay on enough for this to be performed, your unit will have to be sent in to service.
Fixed. Called Garmin. It seems that version 4.90 FW on the Nuvi 350 (which came shipped on my 350) has a bug where it cannot communicate with the Garmin software either to update maps or update FW. Tech from Garmin e-mailed me a patch that I copied into the Garmin folder on the Nuvi itself, via USB and Windows Explorer. I then rebooted it; the patch installed itself which then allowed the unit to communicate with the map upgrade software and all is well. 2009 map update is now installed and the Nuvi is working fine again. Haven't tried upgrading to newer FW yet; will probably leave well enough alone.
Hello, Here was my problem. I was traveling at 60mph yesterday and my Nuvi 360 dislodged and fell down with a huge impact inside my car. I came home and tried to look for any damage. Unfortunately Nuvi had stopped to continue beyond loading maps screen. I tried rebooting , but the problem persisted. It would take me to reboot screen, but after screen calibration, when it came to loading map screen, again went blank. I tried this and just simple starting by pushing power button several times but to no avail. I called technical support, eho advised me to to just simply connect it to my labtop and leave it that way for 3 to4 hours. Bingo!, in the next 30 mins, I accidentally switched my laptop top off, but Nuvi had started to work all fine.