Question Xiaomi 12s Ultra Black Screen of Death

[KaixerL]

Charged my 12s Ultra to 100% battery. Used it for a few minutes. Put it aside on the table.
Came back an hour later. Phone is black screen. Unable to power on.
Volume + Power button doesn't work.
Charging doesn't work.
Not detected by computer when connected via USB.
24 hours later, still black screen.
No water / physical damage. Phone doesn't show any issues before this.
No warranty as 12s ultra is export set.

Anyone has any idea or face similar situation?

 

[NOSS8]

Send it back as warranty.
Not seen.

 

[GodKingKnight]

Similar issue. Mine had power, and touchscreen works. However completely black screen.

 

[Pindarm]

I had a similar problem with my Mi Mix (1). Have you tried charging it overnight and then hold down power button for a loooong time (30 seconds +)?
That worked for me then.

 

[GodKingKnight]

Yes I've tried leaving it in charge for extended periods of time and cycling restart with vol+power. I've even tried to drain the battery until 0% and tried again. Same the phone works great, but no screen at all.

 

[Pindarm]

Charged my 12s Ultra to 100% battery. Used it for a few minutes. Put it aside on the table.
Came back an hour later. Phone is black screen. Unable to power on.
Volume + Power button doesn't work.
Charging doesn't work.
Not detected by computer when connected via USB.
24 hours later, still black screen.
No water / physical damage. Phone doesn't show any issues before this.
No warranty as 12s ultra is export set.

Anyone has any idea or face similar situation?

See this thread. This is what I did to get my old Mi Mix back to life. Perhaps try to drain the battery completely and then recharge it.

Mix shut off on its own, won't power on.

Got my mix like 1 month ago. Stock miui and recently updated it to 8.5.4.0. No mods or unlocking the bootloader or anything like that. Today, it was at 11% so I plugged it in the charger. 5 minutes in I looked at it and it wasn't charging, so I...

forum.xda-developers.com

Best of luck to you

 

[aegdawson]

Charged my 12s Ultra to 100% battery. Used it for a few minutes. Put it aside on the table.
Came back an hour later. Phone is black screen. Unable to power on.
Volume + Power button doesn't work.
Charging doesn't work.
Not detected by computer when connected via USB.
24 hours later, still black screen.
No water / physical damage. Phone doesn't show any issues before this.
No warranty as 12s ultra is export set.

Anyone has any idea or face similar situation?

Same just happened to mine right now.... totally dead! F@#$%&&... second phone that does this... in 4 years the other one was an ASUS ROGUE :-(

 

[ikuyo]

same happened to me.

I just upgrade ROM 14.1 or 14.2 like newest one.

the ROM installation was peacefully completed. I can get some Camera App improve,,,, but after few days later, when I browsed news on google, suddenly screen blackout. and it's gone,,,

cant charge. cant connect PC. cant boot bootloader,,,wtf