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Garmin 1340T boot loop issue. The unit

Garmin 1340T boot loop issue. The unit continuously boots and shuts down. i've tried the reset procedures (touching the upper left corner in one case lower right in another case, both without connecting to a usb) and it doesn't help. it continues to loop through the boot process until the battery dies. when i plug it in a usb charger, it starts again. the loop itself lasts about 25-30seconds. the web upgrade software does not see the device, so not possible that way. windows neither. would you have a solution for this? thanks

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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 files.

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 firmware.

- Jim

Posted on Feb 24, 2012

  • 3 more comments 
  • olivier letang Feb 25, 2012

    thanks for the explanation. if i understand it correctly, unless i can get my hands on the fix firmware, there is no solution for the gps. would you be able to provide me with this fix firmware or is the unit lost?

  • olivier letang Feb 27, 2012


    again, thanks for answering, but it seems that you are saying you can't provide me any help on this forum. please confirm if my understanding is correct. thanks

    SHARCNET-USA Feb 27, 2012

    No, what I am saying is that there is no magical button to press to easily fix this issue. I have been repairing Garmin units since 2007. How can I contact you directly other than through this forum? via Email?

  • olivier letang Feb 28, 2012

    i am in no way questioning your credentials/expertise. is there any chance you could fix this remotely? thanks

  • olivier letang Mar 01, 2012

    it has been six days since i first posted my question, and the answers that i received are (1) that it's isn't easily done, (2) that person's has been fixing Garmins since 2007 and (3) an invitation to communicate outside this forum.

    i do not find any of these satisfactory resolutions of my issue and would like to request a refund.


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