Thread: Garmin Nuvi 1200 that gets stuck on Garmin logo

I think the problem is either there has been an inappropriate firmware flashed to that device, or it has partial flash damage. Although it appears to dump region 41 successfully, the resultant 41.bin file is empty when it should be 4096KB. The UID and HWID in update.log both show "0" when that line should read nüvi 12xx Series Software Version 6.30, UID: [10 digit number], HWID: [10 digit number] e.g. 3123456789.

So that means your nuvi has lost it's Unit Identification indicating a very serious error in its non-volatile memory region data at the least, or at worst some flash damage involving the space used by region 41. If it's the latter problem i think it's quite doubtful that 41 will be the only region affected. We can try erasing 41, but not just yet because we don't have a copy. First let's try dumping it's 2 firmware regions. Do this:

In the card's 1106 folder: Remove last_id.bin. You can leave update.log in place. Change update.txt as below then repeat the process to dump regions 14 and 127. They should be about 16,384KB and 32,768KB respectively. Unless they also dump as "0", compress 14.bin and 127.bin into a ZIP or RAR file. It'll be much larger than the maximum allowed of 15.07MB therefore can't be attached here, so upload it to a free external site such as mega.nz then post the link. I want to compare your BINs to healthy fw_all and resources data.

This is the new text to use:

Code:

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It doesn't really matter whether 'reboot' is present as a third line or not because the device is incapable of booting anyway.

Thanks again. The knowledge you have is incredible.

Originally Posted by Butters

or it has partial flash damage.

I think it's the most likely

Originally Posted by Butters

This is the new text to use:

Code:

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It doesn't really matter whether 'reboot' is present as a third line or not because the device is incapable of booting anyway.

Using the new code:

It stays hanging with a green line. After half an hour I turn it off and remove the memory.

Spoiler: green line

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Microsd data:

14.bin with 0KB

Spoiler: 14.bin

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Update.log content, again with error.

Spoiler: update.log

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Unfortunately it keeps failing