Thread: Garmin Fenix 6X PRO Bricked :(

The reason GarminCure3/QuickCure3 cannot process the fw is because of what i mentioned previously regarding the bootloader. To expand, the cure program deals with a fw's "boot.bin", misleading-named because it's actually the ramloader. Regardless, the SOLE purpose of cure fw is to interrupt the boot process at the point of loading the Garmin logo splash screen and so then not load any potentially corrupt files, thus re-enabling MSM. Anyway, in your case the device hasn't been 'soft-bricked' by a corrupt file which needs to be removed. The reason it's not booting is almost certainly because an incorrect fw has been loaded to it.

So in VERY simplistic terms, the ramloader ("boot.bin") is loaded to a virtual region (region 12) in "conventional" devices and then from 12 components are loaded by the device itself to 5 (the bootloader). Your fenix entirely skips that first step with region 12 and loads the bootloader DIRECTLY to region 5. The bootloader (kind of like a computer BIOS/UEFI software - but not really) is responsible for executing the main system software (it's a bit like the kernel of a PC's OS). So, the boot cycle will fail if region 5 has the wrong bootloader which then can't start region 14. Alternatively, even if 5 has the correct bootloader but there's the wrong main system software in 14 which the bootloader can't deal with, it'll still fail. It may even be that both regions have foreign data in them but the physical hardware is incompatible with the fw. Also, regardless that G7ToWin reports the HWID as still being 3291 there may be corrupt data somewhere such as in the non-volatile memory region.

I think from the above you'll now understand how the boot cycle works basically and how flashing an incompatible fw may adversely affect the device in several possible ways.

BTW, GarminExpress only sees devices in MSM whereas Updater only uses preboot and WebUpdater can utilise both modes.

I don't know from where those firmwares in the HiDrive link originated but i suspect they're all unofficial versions which have been modified by somebody for whatever reason.

Now some more questions:

• Did Updater.exe at any time report an error or did it always show a flash as successful?
• Did you at any time attempt to load the OFFICIAL latest Garmin fw which is V20.50?

Info:

Code:

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It's available here as a GCD file:

Code:

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If you haven't tried it then please do so now. You'll need to convert it to an RGN file of course to flash with Updater.exe. Here's the thing though, RGN_Tool may not be able to deal properly with the odd layout of the fenix fw because it's expecting to see a ramloader for region 12 (0x0C) not a bootloader for region 5. You might be better trying kunix's [Only registered and activated users can see links. ] to unpack the GCD to BIN files and then re-pack them as an RGN.

Regarding checking the current contents of region 5, in most Garmin devices the bootloader region is protected but in the fenix's case it's maybe not. Try dumping both rgn5 and rgn14 with [Only registered and activated users can see links. ] (skip to [Only registered and activated users can see links. ]).

Hey so I tried to use the Garmin WebUpdater tool to flash the firmware, got this error:

Spoiler: Image

Using kunix's gfw.exe to unpack the GCD did give me the bin files (02BD--0CDB-0802.bin and 0505--0CDB-0802.bin) but i was unable to repack them to a RGN file.

Code:

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I even tried to dump rgn 5 and 14 but got an error saying they dont exist...

Spoiler: Image