Has anyone succeeded in repairing a bricked Poco M3?

[Koyje]

Guys this is my procedure to turn on the phone:

I can make it turn on Android after messing with the battery and sub-board cables but this is just a workahound, trying to turn it on normally through the power button always makes it turn on in edl mode

But opening the device voids the warranty, so anyone who has access to a repair center is better off asking for the warranty

What to do:
1. Disconnect the battery cable and the secondary board cable.
2. Connect charger.
3. Hold the power button.
4. Connect the secondary board cable and quickly connect the battery cable.
5. Release the power button when the device vibrates.

It doesn't always work the first time, you may need several tries to get it

VID_20210514_152510.mp4

drive.google.com

You save my ****ing life

 

[dkrausejr]

My M3 was working perfectly. I put it to restart and then it didn't turn on anymore. It is now only recognized as "Qualcomm HS-USB QDLoader 9008" on Windows. I opened the phone and with some magical combination (remove/connect flat cables from the battery and display, connect the USB cable, press volume keys and short the test points) it started in fastboot. So I was able to flash the "fastboot ROM". Unfortunately, on the next boot it still does not turn on normally. Has anyone succeeded in repairing the Poco M3? In Mi Flash is requested an authenticated account to flash through it, is it worth paying someone to provide the account? Does anyone have the contact of someone who makes cheap? Any help is welcome, thank you!

it worked for me

 

[normal guy in this world]

This happened to me then i just called from other phone it worked for me. It sounds dumb but just try

 

[normal guy in this world]

This happened to me then i just called from other phone it worked for me. It sounds dumb but just

 

[mabinodkhadka]

if anyone still facing this problem i have a easy solution for turning device on.

 

[of.tigler]

if anyone still facing this problem i have a easy solution for turning device on.

what is it?

 

[AlphaBravo]

if anyone still facing this problem i have a easy solution for turning device on.

Share buddy

 

[Emf9195]

if anyone still facing this problem i have a easy solution for turning device on.

i have two phones with this same problem...please share.

 

[mabinodkhadka]

i have two phones with this same problem...please share.

If our problem is same then try this. First check your phone is detecting on computer or not. If computer is detecting device press power key and volume down button at once. Your PC will give disconnecting notification. Please note that timing when your PC gives disconnecting notification. Now disconnect your set, prepair your charger and press power key and volume down at same and at the noted disconnecting timing connect your charger with phone. If you get succeed, your phone will show charging animation. You have to try several to get succeed in this method. Thanks. sorry for my broken English.

 

[AlphaBravo]

If our problem is same then try this. First check your phone is detecting on computer or not. If computer is detecting device press power key and volume down button at once. Your PC will give disconnecting notification. Please note that timing when your PC gives disconnecting notification. Now disconnect your set, prepair your charger and press power key and volume down at same and at the noted disconnecting timing connect your charger with phone. If you get succeed, your phone will show charging animation. You have to try several to get succeed in this method. Thanks. sorry for my broken English.

Hit and Trial. Not an easy method as you said earlier.

 

[mabinodkhadka]

Hit and Trial. Not an easy method as you said earlier.

Do you succeed or not?

 

[AlphaBravo]

Do you succeed or not?

I got it repaired at a mobile repairing workshop, it worked well. After that it I use to restart it after every 6-7 days, because its my understanding that if you run this phone non stop without restarting for a month, it becomes hot hung and switches off automatically. So before reaching that point restart it manually yourself to keep it cool.

 

[cfxavier]

My M3 was working perfectly. I put it to restart and then it didn't turn on anymore. It is now only recognized as "Qualcomm HS-USB QDLoader 9008" on Windows. I opened the phone and with some magical combination (remove/connect flat cables from the battery and display, connect the USB cable, press volume keys and short the test points) it started in fastboot. So I was able to flash the "fastboot ROM". Unfortunately, on the next boot it still does not turn on normally. Has anyone succeeded in repairing the Poco M3? In Mi Flash is requested an authenticated account to flash through it, is it worth paying someone to provide the account? Does anyone have the contact of someone who makes cheap? Any help is welcome, thank you!

Yes I have succeeded in fixing a Poco M3.
It is a hardware problem but easy to fix.
I have seen several possble fixing, but most of tem just hide the problem heating the Motherboard.
The video where I found the solution is the following:

I did it miself, it requires just a litle knoledge of soldering and a component easy to colect in most of the junk motherboards.
Or, perhaps, show this video to a techinitian.
Any average technitian can do it for you.
I am typing this message from my POCO M3
Which was with the same problem.
Good luck.

 

[AlphaBravo]

Yes I have succeeded in fixing a Poco M3.
It is a hardware problem but easy to fix.
I have seen several possble fixing, but most of tem just hide the problem heating the Motherboard.
The video where I found the solution is the following:

I did it miself, it requires just a litle knoledge of soldering and a component easy to colect in most of the junk motherboards.
Or, perhaps, show this video to a techinitian.
Any average technitian can do it for you.
I am typing this message from my POCO M3
Which was with the same problem.
Good luck.

Which component he moved?

 

[cfxavier]

Which component he moved?

It is a coil 1uH 3.2A +-20%.
However, this solution did not last long!
Sorry.
But, I am trying different approaches, I will post the permanent solution.
Now I have 4 different POCO M3.
Please give me a couple of weeks.
One of the POCOs worked with removing 2 capacitors, however, the other 3 lost carrier when I do the same.
For now, just disconnect the battery and the screen/changing cable before each power on.
I will find a solution.
I have 3 cell phones to fix!

 

[cfxavier]

It is a coil 1uH 3.2A +-20%.
However, this solution did not last long!
Sorry.
But, I am trying different approaches, I will post the permanent solution.
Now I have 4 different POCO M3.
Please give me a couple of weeks.
One of the POCOs worked with removing 2 capacitors, however, the other 3 lost carrier when I do the same.
For now, just disconnect the battery and the screen/changing cable before each power on.
I will find a solution.
I have 3 cell phones to fix!

Ok!
I have tried removing the big capacitor in the top of the circuit and the one in thr botom. It works. My wife is with this phone for 3 weeks it is good! However, if you have replaced the coil for anything different of 1.0 Henry. The phone will loose the carrier.
I am trying the fix as shown in the following video:

Note that, this circuit is a LC oscilator, which uses 3 of the 5 capacitors. The fixing shown in the video looks very promissing. Placing a bigger (10 uF instead of 4.7 uF).
I will try this solution with different coils.

Thing that not work (permanently):
1-just remove the cap
2-heat the coil
3-replace the coil
4-remove the top capacitor (the bigger one)

Thing that worked (so far):
1-remove both capacitors (without changind the coil)

In one of my devices I damagef the IC
and I had to remove everything and short circut the vbatt with the output of the coil it works, but the phone lost the carrier.
Therefore, be extra carefull!

Please give me another 3 werks.
I will try to fix the phone with the lost carrier.

 

[joekerr00]

I'm having this issue and I can;t figure out how it happened or what the cause is I thought it was magisk or youtube vanced but I'm daubting it now.
after a reboot the phone rebooted in edl mode, if I let the eatery completely drain could boot in fastboot and then in recovery and or system,as I was having camera issues I took it to the local mi service centre the guy said it was software and it was cause I had the phone rooted, two days after that it stopped rebooting. I was playing with different recoveries and in twrp I got an error enablefilecrypto_failed and that I should erase data I did so, the phone lived for a reboot and then it died in edl.
both the pc and mi flash see the phone in edl mode but it wont boot, I've been trying to drain the battery to get into fastboot mode without success for the past three days.
my thinking is the service guys didn't activate fingerprint or password encryptiion and the phone worked until I added fingerprint lock it could be something with the current rom and encryption if I manage to boot it again and if removing encryption helps I'll comment if not I'm gonna take it to the xiaomi service and probobly get a new board as I'm sure it's not an inductor or condenser combination but if somebody figures it out please writte as this was a good phone while it worked :/

 

[joekerr00]

after a few weeks being locked in edl my phone woke up and I managed to flash it with mi tool but now I get an error nv data is corupt, sadly I didn't notice and locked the phone during flash and now fastboot is useless.
my point being this might be a symptom of multiple causes most of which are hardware related.
I don't know if nv data error is fixable or the mother board might need replacing but...
I just wanted to share my experience.

 

[AlphaBravo]

I attached my POCO M3 to the laptop after 4-5 months of it being dead, and it showed sign of being charged. After about 20 minutes of charging by the laptop I tried to turn it On and it turned On. Now running fine.

 

[Devil_of_CRY]

My M3 was working perfectly. I put it to restart and then it didn't turn on anymore. It is now only recognized as "Qualcomm HS-USB QDLoader 9008" on Windows. I opened the phone and with some magical combination (remove/connect flat cables from the battery and display, connect the USB cable, press volume keys and short the test points) it started in fastboot. So I was able to flash the "fastboot ROM". Unfortunately, on the next boot it still does not turn on normally. Has anyone succeeded in repairing the Poco M3? In Mi Flash is requested an authenticated account to flash through it, is it worth paying someone to provide the account? Does anyone have the contact of someone who makes cheap? Any help is welcome, thank you!

I had same issue, its mechanical problem for all poco m3, take to service they will fix it. It can be fix with two way one with battery indicator not changing stick on 50% , they take off two resistor from mother board its cheap the second way is repair the motherboard it will be expensive but work normally.