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Mi 9 turned off randomly and progressed to total shutdown

On April 6, my Mi 9 started turning off at random times - I tried but was not able to reproduce it, so could not identify the root cause to any app / battery level / etc. I could turning it on again by just pressing the power button. It would be stable for a couple of hours until it would shut down again.
On April 7, same symptoms shown, but just pressing power would not turn it on again. I had to press volume up and power, get to recovery menu and mark "reboot to system".
On April 8, same symptoms show, but this time, no key combination would turn it back on. If I connect the charging cable to power, no led would blink and there was no battery charging animation. Connecting to the computer, there was no USB device identified. It was dead.
On April 9, in the morning, while trying to turn it back on, it would blink the notification led twice, but that was it. So I sent it to a service repair shop - not a Xiaomi authorized service repair.
On April 13, the service repair shop has provided me a quote for fixing the phone: reformatting the phone. Since for me this was a hardware and not a software problem, I collected the phone back.. and it was working as if nothing happened, no software was updated.
On April 14, it shut down again, twice. Pressing the power up worked fine.
On April 15, I unlocked the bootloader and flashed the software again with MiFlash on fastboot mode.
The phone is now stable, although it's my secondary phone now - so I use it much less frequently. But since I have no idea what triggered the problem, I don't know if the phone is stable enough, or if the issue will repeat at any minute - especially when I most need the phone.
Also, I tried contacting the service shop technician, to check if he reconnected the battery cable or checked for any short circuit on the board, but couldn't because of the lockdown. So I have no idea why phone is back from the dead, and no idea if/when it will turn itself randomly again.
So my question to the experts:
1) What could have caused this issue with the phone? What are the possible ways to monitor / check what could have caused the issue? Is there any way to capture a crash report after fact?
2) How can I ensure that this won't happen again? I already reflashed the phone, but I wonder if I should do something else..
3) What can be done to try to reproduce the issue? If there is a way to learn from the phone crashing, what are the things I can do to improve the odds of the phone crashing again?
Thanks!

Update: I left the phone to be serviced... and they could not find any issue with the phone. It is now working, but I'm pretty sure in 1 or 2 days it will stop entirely again...
.. and have no way to monitor it

tha same problem here. my mi9 suddenly died! what can i do? waiting the service or buy a new one?

the same problem, my phone just suddenly said the system was destroyed

Same problem here. Service said "no warranty - damage due to damp"
I doubt it. But now I have to handle it on my own.
@lusp00ky: Does your phone still work after you re-flashed it?
Still hope the best ;-)

bollacken said:
Same problem here. Service said "no warranty - damage due to damp"
I doubt it. But now I have to handle it on my own.
@lusp00ky: Does your phone still work after you re-flashed it?
Still hope the best ;-)
Click to expand...
Click to collapse
Unlock BL and clean flash did not work for me.
Now it is dead until the battery is drained. After that it can be brought to live again by a charger.
I don't get it. -.-"

X2 PRO Weird Issue

My X2 Pro has been a great buy up until this morning when I went to look at my phone and it was off having been on during the night,
I pressed the power button and the Realme logo was flashing for around five minutes,
(The logo might stay steady for a few seconds then go back to flashing),
It eventually got to the password screen. Not the SIM password screen which would usually come first on a proper boot up,the phone would not accept my password but luckily I was able to power off the device from here and it rebooted normally,
Bit scary though this behaviour,I'm on the EU model running RUI .24 update unrooted,
Thinking of doing a hard reset but wondering what could cause this ?

maybe the battery is bad, was it low when it happened
does it work now?

Derek100 said:
maybe the battery is bad, was it low when it happened
does it work now?
Click to expand...
Click to collapse
There was around 50% left,phone is working fine since though,Am just putting it down to a bug in RUI.If it happens again I will hard reset

Self Restart

I have got my Asus ROG Phone II for about 8 months and I have recently got some problems with the software. The phone suddenly turns off on it's own, when I am using it and stucks at the restarting process with Asus Logo and the loading bar on the lower side but doesn't open, even if I wait for a full whole hour. I have to press volume down + power off button to make it work again. I wanted to ask if any of you guys have got the same problem, or any clues how to solve it?
Well I had rooted my phone after a month of it's use and unrooted it. For about 2 Months before, my charging port stopped working and Asus Service Center fixed it, and I guess they somehow flashed my Phone, as I not don't have to download and install the new firmware. It was good in a way but I feel it is getting some lag during the use of certain apps and the problem which I mentioned earlier. I would be thankful and grateful for your replies.
Wishing all to stay safe and healthy

Fantasticooo said:
I have got my Asus ROG Phone II for about 8 months and I have recently got some problems with the software. The phone suddenly turns off on it's own, when I am using it and stucks at the restarting process with Asus Logo and the loading bar on the lower side but doesn't open, even if I wait for a full whole hour. I have to press volume down + power off button to make it work again. I wanted to ask if any of you guys have got the same problem, or any clues how to solve it?
Well I had rooted my phone after a month of it's use and unrooted it. For about 2 Months before, my charging port stopped working and Asus Service Center fixed it, and I guess they somehow flashed my Phone, as I not don't have to download and install the new firmware. It was good in a way but I feel it is getting some lag during the use of certain apps and the problem which I mentioned earlier. I would be thankful and grateful for your replies.
Wishing all to stay safe and healthy
Click to expand...
Click to collapse
Don't know what the problem is, but you've posted this in the wrong section!

I think I am in a similar situation. My phone's problem is that it kind of crash while booting up (stange lines shows on the screen like some glitch) , it doesnt boot up normally and it loops 3 to 4 times until it's left on a black screen. I am not sure of its status at this point for it is not responsive even to force restart (Vol down + Power) but it does work only once in a couple of minutes and proceeds to bootloop and back again to the black screen. I haven't rooted it but i did flash it from CN to WW which was successful and was using it perfectly for 4 months up until this situation. I dont know what exactly is the problem. Can anyone help me?

Same with me bro... Mines already bricked because of flashing it to the original version

Same here

Samsung Galaxy A71 died after updating to Android 11

Ok, so here is to explain what happened, so you can have a clue what am I talking about.
I bought Galaxy A71 a month ago (give or take), so out of the box it had Android 10. The phone was working flawlessly. Battery life awesome, pictures from camera great, etc. So, few days ago on March 26, 2021, an update to Android 11 came in. I am a tech nerd, I know about phones, rooting, flashing, etc.
So, I saw that I have around 78-80% of the battery so it was enough to download and install Android 11.
Downloading and installing and optimizing apps after went smooth as silk. I usually soft restarting my device after any software update, so I did that after the installation of Android 11 was entirely finished.
But, this is what happen when I restart my phone the normal way. I press and hold the power button, the dialog of Power off, Reset and Airplane mode came out, tapped twice the reset button and phone went restarting and just.... died. I remember that when I soft restarted my phone, the battery was on 72%. So I tried any trick in the books to turn on my phone again like combinations of pressing buttons, then with USB cable, charger, etc, but nothing was responsive. It's like the phone was clinically dead.
My phone is still under warranty and I will probably end up taking it to the T-mobile store, but the point of this thread is to inform others of the situation like mine and see if someone else had the same problem?
Maybe someone will post a solution what to do in situations like this?
If I find any solution, I will update this post with all the details.

You probably done it.But have you plugged it into A computer to see if the computer can detected it?

Essex_Hal said:
You probably done it.But have you plugged it into A computer to see if the computer can detected it?
Click to expand...
Click to collapse
Yes i did, nothing shows in Device Manager. As I said, I tried every possible trick to wake the phone up, but it was unsuccessful.
I end up taking it to the carrier store cuz it is still under warranty. They told me if they can't fix it, they'll probably give me a new one or to wait for Galaxy A72 To arrive in 2 weeks. We'll see what happens.

BorisMKD said:
Yes i did, nothing shows in Device Manager. As I said, I tried every possible trick to wake the phone up, but it was unsuccessful.
I end up taking it to the carrier store cuz it is still under warranty. They told me if they can't fix it, they'll probably give me a new one or to wait for Galaxy A72 To arrive in 2 weeks. We'll see what happens.
Click to expand...
Click to collapse
Least you still have A warranty to help you.
Good luck with it.Hope you don't lose your data if it's still on the phone.

Essex_Hal said:
Least you still have A warranty to help you.
Good luck with it.Hope you don't lose your data if it's still on the phone.
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Click to collapse
They fix it, it said it was software problem, got stuck on rebooting. I get it today (2 weeks later) and it worked. They managed to turn it on but without a factory reset, every app was there, every picture, video, contacts, call history, etc. I don't know how they did it, but they did. So when I got my phone back I tried to restart it normal way, long press of the power button, then tap Restart and again restart. The phone restart it without a problem. I was happy. Then later that day (2 hours ago when I'm writing this, I notice that always on display when i touch the phone screen will show up but doesn't switch off after 10 seconds (I set it up like that), instead it started to blink in intervals like i was touching the screen continuously. Then I did a deep soft reset. You know, when you press Volume down and Power button at the same time and.... got the same problem again. Phone is non functional, none combination of pressing buttons worked, just like i describe it in the OP. Just for information, I did the same on my previous phone Galaxy A7 2018 and never had this problem. I did it on this phone too, never had a problem. Then I remember it that on both phones when i do that and not having problems were running on Android 10. this phone now update it to Android 11 and that buttons combination is probably bricking the phone. It's just a thing I notice. So I am planning to call the official service that fixed the phone how did they do it, so maybe I can do it myself too. I don't want to wait for another 2 and a half weeks.

I am facing the same issue. And I think my warranty is out. Did you get to ask them how can you turn it on yourself!!
I would really appreciate some help here!

BorisMKD said:
Ok, so here is to explain what happened, so you can have a clue what am I talking about.
I bought Galaxy A71 a month ago (give or take), so out of the box it had Android 10. The phone was working flawlessly. Battery life awesome, pictures from camera great, etc. So, few days ago on March 26, 2021, an update to Android 11 came in. I am a tech nerd, I know about phones, rooting, flashing, etc.
So, I saw that I have around 78-80% of the battery so it was enough to download and install Android 11.
Downloading and installing and optimizing apps after went smooth as silk. I usually soft restarting my device after any software update, so I did that after the installation of Android 11 was entirely finished.
But, this is what happen when I restart my phone the normal way. I press and hold the power button, the dialog of Power off, Reset and Airplane mode came out, tapped twice the reset button and phone went restarting and just.... died. I remember that when I soft restarted my phone, the battery was on 72%. So I tried any trick in the books to turn on my phone again like combinations of pressing buttons, then with USB cable, charger, etc, but nothing was responsive. It's like the phone was clinically dead.
My phone is still under warranty and I will probably end up taking it to the T-mobile store, but the point of this thread is to inform others of the situation like mine and see if someone else had the same problem?
Maybe someone will post a solution what to do in situations like this?
If I find any solution, I will update this post with all the details.
Click to expand...
Click to collapse
have same issue too anyways to fix it?

Need help rectifying my phone !!!

So here the deal guys , my mi 9t pro is about a 18 months old and recently started to have issues with battery life (long story and since I wasn't personally using it I can't explain the issues very clearly but it was all over the place doesn't charge at times verified the charger was indeed charging another phone , sometimes the phone turn off when the charger is connected so quite a lot of erratic faults and no consistent issue to point out )
I have been trying to look into it for a week now and this is my observations.
So first and foremost the phones does not turn on ,meaning that when just the power button is pressed it is stuck on the boot screen with just mi displayed on the screens and does not change at all even after hours.
I did find a way around it when I send the phone to recovery mode by pressing the volume+ and the power button and then selecting reboot and reboot to system. This way the phone always turns on . How long it remains on is a different matter some times it a few secs while at other times it could up to 10 mins and most of the time if its plugged to a charger and I disconnect the charger it immediately turns off.
Things that I have tried
Firstly, I had suspected the battery but on opening the rear cover realized that the previous battery looks in extremely good shape additionally I connected the new battery but connect the cable and realised that the fault persisted.
Thinking it was a software issue I also tried to flash the latest MIUI version from its official website with no help.
Now I am certain the issue is with the circuit or with the motherboard.
Any previous experiences and how it was fixed could be helpful .I don't mind doing some troubleshooting myself and can arrange for advance tools if required.
In short would appreciate advance level help as I enjoy fixing these things myself.
TL;Dr my phone is behaving quite erratically and having tried the battery and software need help repairing it.

Did it flash without issues? And how did you flash it, which tool? What variant of phone? And what rom version did you flash?

Turbine1991 said:
Did it flash without issues? And how did you flash it, which tool? What variant of phone? And what rom version did you flash?
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Click to collapse
So yes flashing was done without any problems i used the fastboot method of flashing following this guide in its entirety
https://c.mi.com/oc/miuidownload/detail?guide=2
flashing it with the latest rom latest miui rom from the same website