Question Mi Band 3 dead after upgrade

[boros2222]

Hi!

The 2.0.0.4 custom English Bold firmware was running on my Mi Band 3 with official Mi Fit from Play Store. Then I updated the Mi Fit app which upgraded the band's firmware to the official 2.2.0.14 firmware successfully. After that my band's screen has turned off and there is no life in it since then.
The screen is black and pressing the button doesn't make any difference. My phone can't see it no matter which app I try. I have tried every tips I could find in the FAQ, except discharging because it would take forever since my band is fully charged.

What could go wrong? It was the official firmware and the flashing was successful, flashing went up to 100%.
Is my Band 3 bricked?
Is there something I could try?
Is there something to make discharging faster?
How would I know if it's fully discharged since the screen is black all the time?

Thanks a lot for any help!

 

[Light]

Put the band in the charger. It must to appear how much is charged. If it's broken don't appear anything.

 

[boros2222]

Well, the screen remains black even if I put it on the charger.
I guess, it's dead.
Still unbelievable how it could die from flashing official firmware.

 

[Light]

You should returned to the seller.

 

[spacemedia]

Well, the screen remains black even if I put it on the charger.
I guess, it's dead.
Still unbelievable how it could die from flashing official firmware.

Try with another charger and charging cable

 

[r755]

try to put your mb3 in freezer

 

[tomerr]

try to put your mb3 in freezer

please stop with the freezer bullshit. it's a "battery myth"

 

[r755]

please stop with the freezer bullshit. it's a "battery myth"

but someone said it works and it never hurts to try it

 

[r755]

chill bro. Im just trying to give suggestion

 

[boros2222]

I can't return it to the seller, it's from Banggood.
The charger and charging cable are not the issue.
I have also tried putting it in the freezer for 2 days.
My MB3 is still dead, probably forever.