poco m3 does not turn on anymore

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door_jam

Member
Jan 27, 2013
18
4

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.
 
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conduisant

Senior Member
Jun 14, 2014
98
9
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 ?
finaly i've repaired my poco M3 whith following tutorial (removing the shield don't resolve anything on my POCO M3)
 

Lingatsu

Member
Aug 29, 2022
33
7
OnePlus Nord CE 2
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 ?

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.

The phone is back, they have swapped/replaced the motherboard (new IMEI number). It came with 12.0.9.0 I've updated it straight away to 12.5.7.0 and now I hope for the best that it keeps working.

Does it still work nowadays ?
 
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Idriss BENDAOUD

New member
Jun 15, 2017
3
2
Casablanca
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
 

boluwarin

New member
Oct 23, 2022
1
0
Remove the back and unplug the 2 battery connectors. Hold down the power button WHILE connecting them back.
 

ANerdyNub

Member
Apr 16, 2022
16
0
I encountered this same problem, what I did was unplug the battery but still the phone won't turn on, so I drained the motherboard by placing the multi tester point on those 2 contact point just above the battery connector on the mainboard, wait till it is fully drained, 0.001v
this made it turn on after placing back the battery.

seems like a caps or power IC issue
another issue was earphone sensor
can you send picture of which points?
 

Skoll43

New member
Nov 25, 2017
2
0
Hello everyone! Thanks a bunch! This is the only method that worked. However, I did it slightly differently. Since it wouldn't boot in fastboot mode while was connected to my laptop, when it started charging I connected it to the charger and let it charge 2%. After I pushed down power and volume down and it triggered fast boot mode. Then I connected it to the laptop and used "fastboot continue command". Ther is also a small software tool that's called XiaomiADBFastbootTools, it's more user-friendly than cmd from platform-tools..

You saved me! Now I can retrieve all my personal files, charge it 100% and return it to the store after I forcibly induce a deadboot and use the warranty to fix it.

What a waste of time. My trust in Poco has left to never come back, since the phone is from a May 2021 batch, and they still made it and sold it knowing it has this fatal flaw.

Thanks again for this post and my special thanks to @Alecxs.
This solved it for me, LOVE IT
 

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  • 10
    permanent and ultimate fix. just remove shield
    then reassemble phone

    * There is no isolation ( inner side of shield)
    To prevent contact between capacitor and shield then we can isolate it or just removing that shield

    Just do it with edl (Qualcomm 9008) condition (your pc will detect it when installing that driver in device manager ports)

    After that all if any problem persistent connect with my WhatsApp i will answer
    +989131074612

    youtube:
    any questions? connect with my WhatsApp
    i will tell details
    5
    - CONFIRMED! -

    I was little suspicious about @sarabbafrani advice, but it actually worked!

    My Poco M3 went nuts after shutting down the alarm clock, only few symbols visible on the screen but otherwise totally unusable. I was able to power up the screen or shut it down but couldn't access the phone software. Only option was to reboot or shutdown with power button.

    After reboot, the phone went totally dead. Couldn't boot up, not with long press power or power + volume up (or down). Plugging in the charger didn't do anything, no vibrations, nothing.

    I did that phone disassembly, remove battery connector, push power button and plug battery again = normal boot. After this happened about 3 times within a month, I decided to try sarabbafrani solution.

    Tear down the phone, remove plastic main board cover, took all 3 cameras away, disconnected antenna and took the main board away.

    I had only hot air gun and decided to cover other parts with aluminium foil. First, I tried speed 1, but no success. Then full power, 5-10 sec blowing 10cm distance, firm grip with pliers and heat shield was out. It almost fell down. Do not use excessive force!

    After cooling down I put motherboard back in and tried that same procedure with power button + battery cable in = nothing :( I thought I fried the whole thing. But when I plugged in the charger it showed the Poco logo and battery level - that's new. Decided to put everything back together.

    It required a long press for power button and the phone started normally! I even did a software restart and it started normally. Charging works also normally.

    I've been using it now only for few hours but hopefully the fix is permanent.

    2.jpg


    1.jpg
    3
    I am sorry if my comment gave you the wrong idea at some point but as you can see I have no reason to accuse you of lying:



    All I'm looking for is OP to clarify my doubt (if possible) and post solid proof that his method works.
    Isn't it odd that at this point no one has tried, recorded and uploaded to YouTube?
    There are hundreds of reballing/reflow videos but I have only seen two pointing out this fix in short videos.

    I just want the OP to give us more than just pictures


    it shouldn't be hard for someone who claims to have repaired to date over 500 units, right?
    You can test it bro
    I am sorry if my comment gave you the wrong idea at some point but as you can see I have no reason to accuse you of lying:



    All I'm looking for is OP to clarify my doubt (if possible) and post solid proof that his method works.
    Isn't it odd that at this point no one has tried, recorded and uploaded to YouTube?
    There are hundreds of reballing/reflow videos but I have only seen two pointing out this fix in short videos.

    I just want the OP to give us more than just pictures


    it shouldn't be hard for someone who claims to have repaired to date over 500 units, right?
    I work for importer company , that We provide after sale services instead of the manufacturer because of sanctions in iran, for free.
    Other companies in my country also sending their phones for me to fix

    That was Cause of this quantity
    I can not take video and fix @ same time
    Ok bro i will record new video soon
    3
    permanent and ultimate fix. just remove shield
    then reassemble phone
    youtube:
    any questions? connect with my WhatsApp
    i will tell details
    Thnx my Poco M3 is now able to restart even shutdown. It always Boot.
    3
    FIX , FIX, FIX. My poco m3 stopped booting up/recovery/bootloader. Tried disconnecting battery connector, display connector, reheating but nothing worked permanent. Only solution was to wait for the battery to drain after which charge it enough to boot it. That worked but i couldn`t use recovery or bootloader until battery discharged and then booted it to recovery/bootloader as first boot. I contacted my friend from whom i bought the device from. He said its possibly due to some short circuit and all i had to do was clean the charging port (where the charger is connected) and the ear phone plug port with a tooth brush (bristles of tooth brush should be straight) dipped in 3-4 drops of petrol. At the time my phone was dead and was waiting for the battery to drain. However i followed my friends instructions and cleaned the charging and ear phone ports. After allowing the ports to dry i tried to boot the phone. It didn`t boot remaining dead. I had to wait a day+ for the battery to drain. I then charged it until it booted. I then tried to reboot it into bootloader and it WORKED. I treid recovery and it WORKED. Now AlhamdoLILLAH my phone is good as new except the marks on the cover made when i removed the cover. Try your luck Gentlemen.