Ok thanks. Let's carry on trying with software attempts until all options are expended. Extract the ZIP file behind the spoiler directly onto a CLEAN card between 2 and 32GB size (formatted either FAT16 or FAT32), to show Garmin folder and 14.bin. Insert it into the fully OFF device and then power it on, it should show "Loader/Software Loading" or similar message on the screen. Once it finishes (you'll know as it'll either freeze on logo screen or it'll start bootlooping again, hopefully the former), remove the card and post the contents of the newly created update.log file contained in Garmin\Updater\1364 folder.
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The 14.bin is a cure however i'm suspecting that it's already been loaded during previous attempts hence the change in logo screen you've reported.