poco m3 does not turn on anymore

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Ivan1967

Member
Oct 12, 2019
16
1
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...
 

Kremalac

New member
Jul 20, 2022
4
0
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?
 

Sus_i

Senior Member
Apr 9, 2013
1,691
724
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?
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).
 
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Copro

Member
Jul 28, 2009
48
12
(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...
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 ...
 
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Eiion

Senior Member
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.
 

conduisant

Senior Member
Jun 14, 2014
92
8
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 ?
 

Eiion

Senior Member
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 ?
Read the thread.
There's a shield to be removed from the Mainboard that's causing a short.
 

conduisant

Senior Member
Jun 14, 2014
92
8
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 ?
 

Chazy12

Senior Member
Nov 6, 2013
167
44
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..
 
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Sus_i

Senior Member
Apr 9, 2013
1,691
724
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..
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.
 

Chazy12

Senior Member
Nov 6, 2013
167
44
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.

IMG_20220806_214527.jpg


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.

 
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danbeko

Member
Feb 5, 2018
10
0
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.
 

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  • 8
    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
    4
    - 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
    If the draining battery method worked for you, you should do the mentioned fix...
    Otherwise the deadboot can happen anytime again. Worst case, in between an update or something like that.
    It depends on distance between shield and capacitor
    In some cases these two contacted all times
    In other cases if main board gets warm then capacitor connects to shield it will gets warmer and more battery usage
    I didn't have a soldering station or a heat gun available and since the alternative was to throw everything in the garbage, I removed the shield in a somewhat barbaric way. I took a fixed screwdriver with a wide tip and inserted it in the middle and with a little pressure the shield came off
    🤦🤦🤦 Do not attack in this way
    I should tell it for all owners
    1.Take off all cameras 2. Be careful about plastic parts 3. Cover all other parts from heating 4. Carefully heat that ic shield about 380-400°C 5. Carefully picking up vertically with Tweezers (be careful for shaking , pcb is hot with parts under shield ic and caps)
    Heat untill shield base solder gets weaker
    Pick it up without force because pcb ways may broken and affects on mobile network amplifier
    You can test mobile network with this code
    *#*#4636#*#* gsm only lte only and wcdma only
    Image attached, pcb damage after removing shield cold
    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.