Thread: How to unbrick a nüvi - step by step guide

Okay - the .rgn file was generated in a new directory - GarminCure3_TEMP, so I copied that .rgn file up one level into the same directory as updater.exe, and it ran okay. Put Nuvi 54 into pre-boot mode, connected USB, and updater recognized my device. when I clicked okay, got error saying Garmin device is not responding. I re-tried several times, and eventually, got a dialogue box saying no updates available, which implies that my .gcd file may be wrong. I got it from here:

Code:

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The correct firmware is this:

Code:

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nuvi 54 is a re-badged 52 [HWID 1613] not a re-badged 50 [HWID 1350]. Right clicking on the above page and selecting 'View Source' or similar from the context menu opens a new window with this in it:

Code:

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Use that to make your cure fw and it will load ok.

Thanks to Smokefree,

Used this tutorial to unbrick nuvi 2460. Took several tries and various .gcd files until one worked. Computer recognized nuvi, I formatted and downloaded new files.

Great site.



Thank you for your kind words. Much appreciated!

Bootlooping units can be tricky to hold in preboot mode. That message means that it's exited preboot, so timing is crucial and that means a bit of luck and a lot of perseverance comes into play. You need to start the flash at the right moment so you may need dozens of attempts, usually best results are achieved by hitting 'OK' or the Enter key immediately you see the unit details appear in Updater.exe's GUI and keeping firm steady pressure on the upper LH cnr of the screen until at least 'Loader' appears on the screen.. Keep trying, if you can see the logo you can achieve flashing in preboot eventually.

Note that there are two HWIDs for 13x0 devices, 0972 and 1104 [MTK chip version] so be sure you have made the cure from the correct fw for yours.

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