The Garmin Instinct bug which caused that it was no longer able to boot. And the Master Reset.

The Garmin Instinct watch had a serious bug,
at least in firmware version 12.00 and all previous versions.
In the version 16.41 the bug is already corrected. I did not check versions in between, so I do not know exactly in which version it was corrected.
Garmin Connect web allows naming courses using UTF-8 characters, and the Instinct watch is able to show them, BUT:
Some combinations of the name length and position of 2-byte chars
in the name were FATAL!
Instinct was not able to handle such course file, and what was much worse, after switching off was no more able to boot.
Fortunately Master Reset helps, but it is necessary to wait for circa 3 minutes.
More exactly, Instinct uses 16 bytes for the course name, while Garmin Connect sends course files
where name can be 16 characters long in UTF-8 code. Instinct probably simply cut the name to 16 bytes, but
when there was a 2-byte or 3-byte character over the 16 bytes border, problem arose.
Some examples of names which caused it:
Garmin Instinct®
Špindlerův Mlýn
Česká Třebová
Dunajská Lužná
Ростов-на-Дону
Новая Земля
Düsseldorfstraße
Kempten im Allgäu
Radzyń Chełmiński
Lyon-Saint Exupéry
Taberna La Española
Magyarszentmiklós
Кривий Ріг
Saudade do Iguaçu
Copenhagen Malmö
Αμφι-Θέατρο
בֵּית לֶחֶם
مدينة الكويت

[@ragnaroien1]

This was the answer to my problem. Cheers!

[@InfallibleDogbert]

Legend!
This saved me from the same issue on an Instinct 2X.
Not supposed to still be an issue but uploaded a GPX track on Garmin explore and about 1/2 way through it froze the watch and I assumed it was dead.
Saved me dealing with idiots for warranty.

[@benlondon8467]

Thanks, this type of reset got my watch going again 👍, normal reset would not work.
My watch basically when flat after 8/9 hrs of GPS navigation, when I put it on charge, the watch turned on to Garmin default screen and stayed that way for 3 days until I found this information on RUclips, tried it & and it sorted it .

[@indrabale7884]

U r awesome bro.... This technic fixed my problem thank u👍🏼

[@DNF4U]

Very useful trick indeed, thank you. This is my second time master rebooting my Garmin Instinct Solar 2x. It freezes during course navigation even after updating with new software.

[@migano666]

worked for instinct 2 solar tactical. Got frozen screen while navigate to recorded activity at -12C outdoor. After soft restart no boot - stuck on GARMIN logo. Thanks !

[@robertschonherr3943]

Exact same issue. Solved.
Thanks a lot.

[@abetclemente570]

your video really help a lot. thanks

[@michaelgruver463]

Fixed my problem. Thank You!!!

[@prafful1723]

Thanks a lot!

[@elwin82]

wonderfull...thx u sir....can fix my garmin after freeze for 2 day

[@andrewosullivan8992]

Worked for me where no other solutions worked! Thank you!

[@MrLionheart75]

You are a life saver man! Thanks a lot!

[@swatikarmakar]

This really worked man !!

[@sahid1102]

thanks you sir, it's work for me

[@dumbidiot3650]

Thanks this was life saver

[@akshuu08]

This video saved me!

[@mohdsaifulbahari7024]

The only solution to my freeze Garmin instinct...thanks mate..

[@kraanthivlogs9422]

Perfect Solution 👍🏻.Thank you so much

[@melmihugni]

solved my problem in 2022, thanks a lot!!

[@KND_Army]

Thank you sir

[@DOMINATOR-ou8nz]

Maaan u saved me!!!❤❤❤

[@GM-pr1fd]

Thanks a lot, this method saved me ,great work 👍

[@wiralicik]

My Garmin was freezes. But this master reset not helping me. Any suggestions?

[@abeeshabbas4245]

thanks a lot

[@robinrdale8318]

Thanks

[@abuasabu]

Thank you!! I confirm that the Master reset applies to Instinct Solar as well... Mine was dead for unknown reason.

[@garaudy1]

Thank you, you saved my day.

[@salonibhardwaj1]

You saved my watch! 🤩

[@v1ncz777]

Thankyou.. Its work

[@naminakata182]

working thanks alot

[@GRSM000]

Thanks! this reset rolls back the firmware to the factory version you got it with?

[@mm0063]

No, it does not change the firmware version.

[@ЕгорФирсов-и4е]

thanks!!!

[@yusairi1286]

Thanks

[@jollEEEeee]

Not all heroes wear capes. Thank you.