yashsingh1/xdaforums huggingface dataset:
[POCO M3 Questions & Answers] Eiion:
Unfortunately that is exactly what happened to one of our phones. Unplugging the battery didn't do anything. Firmware is 12.5.5. Update 12.5.6.0 is available but of course, after downloading and tapping restart the phone never turns on again. (What a piece of crap.... but well, it was cheap at just under 90€ back then.)

Yesterday we've opened an RMA case for it and are supposed to send it back. Since the display has scratches though and a very attentive technician might notice that the phone was previously opened (I didn't remove the screw with the water damage sticker and was extremely careful to leave everything as never opened) and they'll try to charge something (like a new display or such) although the only problem is that damned firmware.

I'm considering a custom room to save us all the trouble (and likely money) but I wonder how to install it if the phone can't be turned on after turning it off/restarting it (unless you let the battery deplete first).

Edit: This is what urks me... If a custom ROM is said (elsewhere) to fix the issue then how can it be the short mentioned in this thread that's causing the problem?
[POCO M3 Questions & Answers] Kremalac:
How can i drain my battery fast

I turned it off 13/7 and now its 20/7 and still not opening

should i hold power button every 2-3 minutes or it will just drain by itself
[POCO M3 Questions & Answers] Eiion:
If it was fully charged and drains about 10% per day, you know how much longer you'll have to wait 😉
[POCO M3 Questions & Answers] Kremalac:
yeah it drains by itself or i should try everyday to open it?
[POCO M3 Questions & Answers] Eiion:
If what is discussed in this thread is even your issue in the first place (and not another hardware detect) then yes, it will drain itself.
[POCO M3 Questions & Answers] Copro:
During a hot day the Poco M3 phone had problems with WIFI reception and I thought a reboot might fix it.

So I tried rebooting it but it never came back on and stayed black - no reaction to the charger. But when connected to a Windows PC it shows "Qualcomm HS-USB QDLoader 9008" with e.g. port COM20.

So I am currently trying to drain the battery faster while holding the POWER button but I think it might take a few more days because I might have been at 65% charge.

If I read correctly the other chance I have is to open the device and remove the shield as @sarabbafrani suggested.

Ideally I wanted to get the phone back up again, take a backup and then get it replaced ... or maybe try to remove the shield myself.
[POCO M3 Questions & Answers] Sus_i:
(y)

You may do the drain method to boot (worked only once for me), take the backup and then remove the shield carefully. My phone works just fine without the shield...
[POCO M3 Questions & Answers] hrrhacker:
After that did you rebooted your device is that fix solved your problem i think by removing the shield through heat which heated up the IC and the device get out of edl mode... Sorry for bad English
[POCO M3 Questions & Answers] hrrhacker:
Did the problem occurred again or that's a permanent fix i am in the same situation i removed the shield but nothing happened waiting from 3 days once a charging icon appeared i removed the charger because it was slow to change it to fast one but the charging icon disappeared
[POCO M3 Questions & Answers] Ivan1967:
It's working OK, my wife is kicking it's ass as usual ;-) Try to charge it on laptop or in a train (yes, I know...) Avoid fast chargers, even it's own, at this point. When it did last update, it stayed black, but I holded power button for couple of seconds and it turned on again. If it's charging now anyway, just try to turn it on, hold the power button 10 or more second. It should boot up. And leave it alone to charge...
[POCO M3 Questions & Answers] Kremalac:
before 3 days i booted up my poco m3 and last night it started lagging so bad like i wanted to see stories on instagram and they didnt load because of lag so today when i woke up it just turned off...

What should i do when i drain the battery?
[POCO M3 Questions & Answers] Sus_i:
Take a backup of your data as soon as the phone boots again...

Then take it to a repair store or remove the 'shield' (you find some pictures in this thread).
[POCO M3 Questions & Answers] Kremalac:
so i cant do anything any more update to android 11 or something idk?
[POCO M3 Questions & Answers] Sus_i:
Of course. It's your phone, you can try that too if you like... Good luck. :)
[POCO M3 Questions & Answers] Copro:
The drain method worked awesomely. I adopted some tips that suggested to hold down the power key with some rubber band ... and 10 - 20% battery per days seem like a reasonable drain amount.

The battery was drained after two days which can be easily checked by shortly connecting the phone via USB to a PC and as long as still the Qualcom device "qualcomm hs-usb qdloader 9008" which indicates the EDL mode shows up, disconnect and let drain some more.

Then when it finally just displays the empty battery symbol again, try and charge a little and then press VOL- and POWER to force it from EDL to normal start mode and voila ... phone boots again and currently I made all the backups and removed my data.

Since it is under warranty I can directly send it in for repairs ... but before that I try to bring it back into the EDL mode ... will note down IMEI, other serials and the current MIUI 12.0.11 Stable based on Android 10 to see what the repair will change ...
[POCO M3 Questions & Answers] Eiion:
Just a heads up regarding our Poco M3:

Since it has still half a year left of the two years warranty I've decided to send it in to see what happens after having a call with their support.

Although not asked for anything like it at all I still thought giving the repairman some information on what's going on with the phone, written directly on the copy of the bill (doesn't turn on anymore after turning off unless the battery has been drained; deadboot), today the phone came back. Exactly 14 days ago we brought the package to the post office.

On the delivery notice they said they had checked the phone according to my description and replaced the Mainboard.

I did a little test (turning it on, the off) and was able to turn it back on again. So I consider the phone being fixed. And we indeed got the phone back that we had sent in though it was factory reset by them again (it was before already) and due to the new Mainboard it now has a new imei. I'm not sure but somehow I have a feeling that the new Mainboard was a used part they took from another phone. (I might take it apart again to have a look myself.)

So to anyone having the phone still under warranty, I can only recommend to send it in for repair. It was fixed free of charge for us.
[POCO M3 Questions & Answers] conduisant:
Hello,

also for me, my POCO M3 don't reboot : i have no warranty valid (i buy it used).

I remove the back cover, and the screws to access to main board : i can unplug the battery.

After plug again the battery the phone boot (i'm on MIUI 12.5.6).

But each next boot the phone will stay in QDL mode (lsusb output = Bus 001 Device 005: ID 05c6:9008 Qualcomm, Inc. Gobi Wireless Modem (QDL mode))

=> what can i do now ?
[POCO M3 Questions & Answers] Eiion:
Read the thread.

There's a shield to be removed from the Mainboard that's causing a short.
[POCO M3 Questions & Answers] conduisant:
thanks for your help, i've removed the shield according to the video (

). My phone won't boot, power button do nothing.

When i plug charger, POCO logo appears and battery shows 40%.

And when i plug to PC : lsusb output = Bus 001 Device 012: ID 2717:ff20 Xiaomi Inc. POCO M3

=> what can i do now ?
[POCO M3 Questions & Answers] Sus_i:
Maybe strip it down again (take some detailed pictures from the board) and assemble it back, make sure that all screws are in before you power the phone on...
[POCO M3 Questions & Answers] Chazy12:
I was thinking: it's not better to remove the shield, cut the topper part, and solder it again?! Couse will isolating other parts like antennas, etc.. or just drill some ventilation holes..
[POCO M3 Questions & Answers] Sus_i:
I guess drilling holes is almost the same as removing the shield in terms of isolating ;)

Do you need to meet EMC guidelines? I can't see any difference without the shield, except that it boots fine now.
[POCO M3 Questions & Answers] Chazy12:
Little update: after removing the shield my phone completely dead.

Before I was manager to flash ROM and let work again in EDL, now no life signs.

Them "sparkles" is the light reflecting on the flux paste..

I think something is permanently broken.

As you see in the vid, charging amps it's not good.
[POCO M3 Questions & Answers] Chazy12:
Any solution or just trash it?
[POCO M3 Questions & Answers] Sus_i:
All screws in place?

Give @sarabbafrani a pm, there is also his whatsapp number somewhere in this thread...
[POCO M3 Questions & Answers] Chazy12:
Yep. All screw are in place.

I covered all them component while heating the shell..
[POCO M3 Questions & Answers] danbeko:
5 days ago from now, I have restarted my poco m3 but I couldn't able to turn it on again. I kept pressing power+vol up last few days and then today I have pressed the power button. Now it's functioning as it was before. But I'm afraid what would happen if I restart again.

Current MIUI version: MIUI Global 12.0.9 Stable

What should I do next. Update? Please guide me.

Thank you.
[POCO M3 Questions & Answers] Sus_i:
Take a backup of all important data...

You can use it until it happen again, sooner or later.

Since it's a hardware issue, an update won't help.
[POCO M3 Questions & Answers] missaelili:
Same issue here did you happened to find any solution?
[POCO M3 Questions & Answers] door_jam:
sarabbafrani, I followed your method to take out the shield using a heat gun. It works & it has been running for several hours now. It used to run for less than 30 min (after the battery drain method) & then went dead again.​

Thank you.
[POCO M3 Questions & Answers] conduisant:
finaly i've repaired my poco M3 whith following tutorial (removing the shield don't resolve anything on my POCO M3)
[POCO M3 Questions & Answers] Lingatsu:
Hi, I send my Poco M3 to repair and it seem to work now. They changed the motherboard/mainboard. Do you think it can solve the issue in the long term ?

Does it still work nowadays ?
[POCO M3 Questions & Answers] Idriss BENDAOUD:
Hi everybody,

I'm writing this comment just to thank Mr @sarabbafrani for the solution he gave to solve this poco m3 issue.

When I first suddenly had the problem I began looking for a solution online. The first one I came across was to unsolder some capacitors that help the fast charging function (as described in the solution). I wasn't really convinced because the phone was working just fine before. I preferred not to do so and I followed searching and analyzing solutions. The common problem with all the solutions I found is that they lack the logic. The actual solution I found in this thread was the most logical one for me because the eventual short between one side of the capacitor and the shield would obviously change the electrical characteristics of the circuit and provokes the EDL mode condition. I hesitated a little bit before trying this solution because of some comments saying that it didn't work and the phone is still dead and so on. It.s been about 4 month now since I removed the shield and my phone works fine, restarts, updates ...

The only issue I'm experiencing now is that the phone takes a relatively long time stuck in the yellow "poco" logo before it reaches the home screen. I can't say it is related to the solution because immediately after the shield removal I didn't have this problem.

Thanks again Mr @sarabbafrani for your help
[POCO M3 Questions & Answers] h4lik:
Thank you @sarabbafrani. I used your method.
[POCO M3 Questions & Answers] boluwarin:
Remove the back and unplug the 2 battery connectors. Hold down the power button WHILE connecting them back.
[POCO M3 Questions & Answers] ANerdyNub:
can you send picture of which points?
[POCO M3 Questions & Answers] chaos1922:
Thank you @conduisant thanks to your tutorial I got the phone back on. Is there a way to restart the phone without problems
[POCO M3 Questions & Answers] jo8656:
Bro is draining battery is must to flash the firmware??
[POCO M3 Questions & Answers] Skoll43:
This solved it for me, LOVE IT
[POCO M3 Questions & Answers] sarabbafrani:
I hope this doesn't happen again...
[POCO M3 Questions & Answers] FTPFreezer:
Thank you for this thread and your solution @sarabbafrani. I just restarted my Poco M3 and it didn't turn on anymore - found this thread. I tried to open the case but got stuck at the first corner, just waited a while to try it again later and then the phone happend to start by itself again.

Fun fact: I am using the M3 as a replacement, because my F3 is currently on the way back from the service center as the F3 has severe signal losses. Needless to say, that the service center claims that there is no issue with the phone.

The M3 on the other hand has issues with the touchscreen right bottom corner, but only in specific situations which I have documented in a video for the service center. Again, they claimed, there is no issue.

Verdict: I won't buy this piece of Xiaomi crap anymore. The good prices obviously come at a cost. Short lasting phones and non-existing customer service.
[POCO M3 Questions & Answers] Nani nuar:
First, you need charge your phone.. Than, press power button 10 second.. Than, unplug your charge.. Phone will turn on.. After I'm doing that.. My phone dont have same problem again.
[POCO M3 Questions & Answers] Mord0rr:
ONe more story....my mother phone after a reboot refuses to turn on.....nothing works.

Yesterday i remove the protection of the chips as susgested here.

Seems it did work.......however it responds to buttons very slowly

Charging was also very slow.

Today i arrive at hone to see how was the phone (i left it just ON), and it was dead again........

So far no lucky to wake this piece of crap.

Battery last time was 97%.......so im without more options.

NO recovery....fastboot........battery...nothing.

Xiaomi was ok.....now is SHIIIIII

Seems remove cable battery, does reset something......but im loosing patient here.....
[POCO M3 Questions & Answers] FTPFreezer:
I can confirm: removing that metal cover didn't work for me either.

The behaviour was like following:

Phone didn't turn on, but consumed some energy (which I could see using the FLIR camera on my Cat S60 phone). In this state, there was no possibility to charge the phone (which I could validate by using a power meter). So the phone didn't take any charge.

As soon as the battery was dead, the phone started to charge again and showed the abovementioned behavior: the screen first turned on to show it's charging, then after a few minutes the phone started automatically.

This is somewhat a replicable way to bring this phone to life again - but not entirely.

I have then factory reset the phone to see, if it still can be brought back to life using the same method, but unfortunately it's not working. I still get the charging screen and can monitor the battery charging normaly (5W 2A) but it won't turn on automatically after a few minutes anymore.

There must be more to this problem than the metal cap.

I have read in another forum of someone who got the phone repaired three times and every time the problem occured again after a while. So Xiaomi doesn't even bother fixing this issue for their replacement parts.
[POCO M3 Questions & Answers] Mord0rr:
This sucks.

There was some photos of my deceased father, and i stupidly didnt backup them....

Thanks Xiaomi.....never more!
[POCO M3 Questions & Answers] ogy_j:
Is there a way to update the phone when the phone turn to black screen each reboot ?

When i start the firmware update and try to restart the phone won't restart

So i'm plugin charger when there are no more battery and the phone turn on but skip the update...
[POCO M3 Questions & Answers] Skoll43:
this solved it for me, draining the battery with a rubber band does part of the trick if the phone loses power
[POCO M3 Questions & Answers] lutfulahsan:
after updating to miui 13 for the first time. i rebooted but it is still dead. no message of waiting for upgrading ur phone dont turn off. even after draining battery process it is not opening to upgrade process screen.
[POCO M3 Questions & Answers] Alucard:
Hello when does this issue happens so i can avoid it, is it by wrong flashing recovery or firmware or is it just a hardware issue and luck issue?
[POCO M3 Questions & Answers] baxir:
I would recommed you that try to flash the recovery ROM using ADB, thats the possible way I can think of.
[POCO M3 Questions & Answers] Dheerajvirgo:
which MIUI update are you on?
[POCO M3 Questions & Answers] Dheerajvirgo:
were you able to get your phone working or boot properly?
[POCO M3 Questions & Answers] xaadilhx:
Can't believe this thread has continued this much. I encountered this error on my m3 crash black screen. Always needed to avoid turning off, running out of battery etc or goes to black screen.

Previously messed with software, Edl stuff and eventually today decided either trash the device or try removing the shield as didn't use device properly for a year.

Used a heat gun, heated and removed the shield perfectly, with the heat, I thought it'll break but I'm surprised worked perfectly when connected. Finally can use the device again. Updated mui 13 then 14, rebooted, powered off, all back to normal so stupid issue but that issue was such a pain.
[POCO M3 Questions & Answers] piccolo132:
@sarabbafrani

Can I fix the no 3g/4g issue caused by bad ic solder doing a reflow?

If so, what temperature should I use and for how much time? (air soldering gun)
[POCO M3 Questions & Answers] sarabbafrani:
power envelope tracker ic

that small ic under shield

misaligned or damaged

should rebal or swap ic
[POCO M3 Questions & Answers] piccolo132:
@sarabbafrani

i'll expalin to you what happened exactly:

i did remove the shield and the 2 capacitors, because only removing shield wasn't working for me, then i reassembled the phone and it worked for 3/4 months, then 3g/4g stopped working ( i can still scan for 3g and 4g networks and see them listed, but it won't connect to them) it's stuck in 2g.

so i was wondering if a reflow of that ic would fix it or i need to replace that ic?
[POCO M3 Questions & Answers] rotoko:
If you're already in this area, the only thing left to do is throw away the phone and buy a new one.
[POCO M3 Questions & Answers] roborob999:
Hi.

I had the blank screen problem, then solved it in an unexpected way. No time to read through the forum here, so it may happen this solution already exist. Just my two cents.

Problem.

Poco M3 suddenly would not turn on, just vibrates, total black screen. I had already sent it back once under warranty about a year ago, as it had the post-update problem, I assume they change a part back then, but it had been working fine since then.

Tried:

Holding power, holding power and up or down volume, all I would ever get was a half second vibrate. Also I opened it up and disconnected both battery connectors, still did not work (although, I was thinking I could have left it disconnected for longer than the thirty seconds I did, in case there were some capacitors to discharge). All for nothing. Over about a week I would randomly try holding various power button combinations, always same hlaf second vibrate. I did not try a total discharge.

Solution:

I was thinking maybe if the digitizer is broken, I can connect through a usb-c dock to a monitor and mouse, and see what I can recover that way. So I plugged phone in a Lenovo travel dock, (article 4X90S92381), HDMI into a monitor, and also a 65w power supply into the dock. Tried powering on, nothing came on the computer monitor, but after about a short while the phone just started up like normal. Crazy times. Also, I noticed after that the 65w power supply was not actually switched on at the wall. Phone battery was at 80% when I turned on. Since then the phone has worked like normal.

I hope that helps someone.
[POCO M3 Questions & Answers] roliviu:
I removed the shield, but when I put it to charge it vibrates and lights up continuously, it doesn't turn on or charge.
[POCO M3 Questions & Answers] qunguwueguewue:
Hey! I also have this problem, what's the general consensus on how to fix this? Right now I can access it since I sent it to the repair shop so I could use it again, but I don't know how much longer it can last.
[POCO M3 Questions & Answers] tvhex:
I'm facing a strange issue with my Poco M3 today. The lock screen had characters and numbers. Yesterday, I noticed that the characters are not appearing, so I can't enter the password. The most important thing is that there are numbers from 1 to 9 on the screen, but 0 is missing.

Now, how can I unlock the lock? And there's no "Forgot Password" option below. If it were there, I could unlock the lock using my account.

There's a mobile death problem on Poco M3. When I turn off the mobile power, the phone doesn't turn on. Although I've found a temporary solution for it. But it doesn't go to mobile recovery mode. And once the phone is turned off, it doesn't connect to the laptop either.
[POCO M3 Questions & Answers] Sissou83:
Hi,

and your POCO M3 still works?

I don't have an air gun for desoldering, but I have a soldering iron, do you think I can desolder with it?
[POCO M3 Questions & Answers] Dael16:
@sarabbafrani thank you so much for your contribution. I fixed all of my defective poco m3 thanks to you.

Please let me know where can I send you a little monetary gratification (via PayPal if possible, because I'm from México). I did the procedure some time ago (at the end of 2022) , and I almost forget to come back here and say thank you.
[POCO M3 Questions & Answers] AlphaBravo:
What did you do to recover the phones?
[POCO M3 Questions & Answers] Dael16:
I did as @sarabbafrani said in his post:

I fixed about 16 poco m3 devices using that method. That's why my previous image attached shows so many shields removed.
[POCO M3 Questions & Answers] Guybrush.d:
Hi, everybody i have a similar problem with my poco it charges showing the battery icon, but when is full i got a black screen, if i connect to my pc the phone is recognized as "Qualcomm USB modem converter detected", but i cannot enter recovery or fastboot mode, i didn't unlocked the bootloader, i removed the shield as suggested in an youtube video, but it's the same. I would like to flash a new rom but is there a way to access the phone trought adb if the phone is dead? I haven't an air solldering machine so i cannot flow any hot air on it, do you have some suggestion to fix my phone? At least to recover the pictures inside....Thanks!
[POCO M3 Questions & Answers] Guybrush.d:
I made a lot of search but i'm still stucked, once i have been able to power up the phone but it stucked on the poco logo, after that i haven't been able to reproduce it and i had tried several time to access the phone but without bootloader unlocked i don't think it's possible, nobody can give me some suggestion? i'm tring with mtkclient but the phone is recognized as Qualcomm USB modem converter and mtkclient just sys "Preloader - [LIB]: Status: Handshake failed, retrying...", please help me i need to recover datas from this phone, thanks