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  1. #1
    Member + LittleCassie's Avatar
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    Question Nuvi 7x5T in endless loop reboot: How to fix?

    My family member's Nuvi recently won't boot/load. It reboots almost immediately once it reaches "Loading maps". The reboot cycle is continuous unless I power off the device.

    The below is what I have done so far, but the rebooting still happens:

    1. Hard reset (press right lower side of screen while holding on to the power button) - can't proceed, unit reboots before selecting "erase data"

    2. Entered into pre-boot mode - managed to connect to PC (Win 7) and reloaded original firmware from Garmin's webupdater

    3. Entered into pre-boot mode - reinstalled entire Nuvi original back up and old original firmware (deleted all contents of Nuvi), used original mapset

    Any suggestions on how to kickstart this Nuvi back to normal?

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  3. #2
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    It clearly still has Mass Storage Mode and if it's re-booting on loading maps then a corrupt map img file is probably the cause. Remove all map *.img files including any 3D building maps. If it still won't boot you'll need to reformat: [Only registered and activated users can see links. ]. It doesn't need Cure firmware because it still has MSM to be accessed by PC. You can replace its entitled maps with good copies from GarminExpress or get them from the Map Index here.
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  4. #3
    Member + LittleCassie's Avatar
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    Thank you Neil! The Nuvi was wiped completely before installing the original software. The new maps were removed and then I copied over all the files.

    I will attempt a reformat. The GarminCure3 app didn't work for me because it wouldn't identify the Nuvi via USB even though it shows up in My Computer. I read a few others have this issue too with the app.

  5. #4
    Garmin/GPS Systems GMod.

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    Quote Originally Posted by LittleCassie View Post
    Thank you Neil! The Nuvi was wiped completely before installing the original software. The new maps were removed and then I copied over all the files. I will attempt a reformat.
    By 'wiped' you mean it was just cleaned as in everything deleted from it's visible flash i guess. Regardless, as i said it probably doesn't need a format because it baulks on loading maps and boot-loops. If you load back the map which is corrupt you simply 're-infect' it. Remove all maps as i said and try to boot it without ANY maps. Some nuvi series boot empty but 7xx need at least a Garmin folder created in the root to boot however.

    The GarminCure3 app didn't work for me because it wouldn't identify the Nuvi via USB even though it shows up in My Computer. I read a few others have this issue too with the app.
    There are two entirely different states or modes involved: If it's visible in My Computer [Explorer] then it's in Mass Storage Mode. In preboot mode it is not seen there, but can be seen in Device Manager. Cure firmware is only loaded to enable MSM but you still have that so there is not any benefit in loading cure fw to it at all. Preboot in 7xx is notoriously difficult to obtain and then maintain [it drops out only after about 10 secs if no flash commenced]. Many 7xx [particularly 7x5] go into preboot by the following method rather than holding top LH cnr:
    • Turn off nuvi fully [not in standby]
    • Hold finger or thumb in the MIDDLE of the screen
    • Slide power button left to power on, slide to right to lock, then quickly Insert USB cable.

    That's of academic interest because you don't need preboot mode at present as you don't need to load cure fw anyway, but keep it in mind for future reference.
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  6. #5
    Member + LittleCassie's Avatar
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    Deleting all maps did not help. I had no choice but to reformat using "kunix's cure". It was very tricky to get into preboot mode. I was fortunate enough to have a factory image of Nuvi so all is good now

 

 

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