Thread: IMPORTANT! If you want HELP in case of a bricked Garmin device, please follow this

Hi, I've found this forum from Google and read most of the threads related to firmware recovery - very informative!

Unfortunately recently Garmin has delivered new firmware (16.60) to my Fenix 6S Pro and broken the watch.
People have similar or other related issues - [Only registered and activated users can see links. ]

It's not under warranty and there is no qualified service available at my city.

Issue - it's stuck on green triangle and cannot pass pre-boot.
Soft reset (holding Light button 30 sec) does not help - it's just switching it on/off.
Hard reset (holding several buttons per official forums) - does not help as well - there are no signals where they should be.
GarminExpress - does not see the watch, so it's not possible to update it in usual manner. WebUpdater fails as well, probably because watch memory is not visible at OS.

So I guess the only way is to recovery it using RGM tool. However I am worried about to not broke it completely.
Here is my investigation using information from forum.

HWID of my device (I have copied after buy all watch content) according to GarminDevice.xml - 3288

According to [Only registered and activated users can see links. ], my firmware - [Only registered and activated users can see links. ]

Spoiler: pic 1

[Only registered and activated users can see links. ]

GarminCure cannot convert it:

Processing D:\Fenix6SPro_6SProSolar_1660.gcd
This is a GCD file.
No patchable HWIDs detected
Processing FAILED

I suppose it cannot because tool is old and HWIDs are hard-coded...

So I've tried open GCD using RGN_Tool_V094:

Spoiler: pic 2

[Only registered and activated users can see links. ]

However there are no detected HWID and SW version (Question #1 - is it expected?).
When I've tried to convert it as is, I've received this warning:

Spoiler: pic 3

[Only registered and activated users can see links. ]

After opening converted RGN, it looks the same:

Spoiler: pic 4

[Only registered and activated users can see links. ]

Question #2 - is it safe to try and upload it using Updater.exe into device?

I've found one more tool - @github, [Only registered and activated users can see links. ]
Unfortunately there is no GCD to RGN conversion (planned only), however here is parse results for original GCD and converted RGN:

Spoiler: picset

[Only registered and activated users can see links. ]

[Only registered and activated users can see links. ]

Note that HWID and SW Version are not consistent, so it's my main concern.

Question #3 - is there any hope to resolve this headache introduced by Garmin?

Hope somebody will find time to answer...