(Guide) How to fix a hard bricked Redmi Note 9 (Merlin) (Hard Brick)

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vagelis199

Senior Member
Jun 5, 2014
68
73
guide_img.jpg


A how-to guide of restoring a completely bricked Redmi Note 9​


Hi, In this guide, I will teach you how to fix a hard-bricked Redmi Note 9 (merlin) and bring it back to its original state.
How does a hard-bricked Redmi Note 9 look like? it's stuck in an infinite boot loop showing only the Redmi logo,
Can't access recovery with power+vol down, can't enter fastboot, can't connect it to a computer either.

If this is your phone here's how you can solve it without the need for service.

Following this guide keep in mind that everything would be erased from your phone including custom Recovery or ROM obviously. Also the bootloader would get locked again.
(I mean at this point you either have a useless brick or a working phone, you are choosing).


This is tested by me, and it works as long as you follow the steps carefully and you don't skip anything.
(I did this on Windows 10 btw)


  1. You gonna need to download, Python and the official Xiaomi fastboot image for Redmi Note 9. Also the zip file I'm attaching bellow. the zip file contains the MTK Drivers, SP Flash Tool, and some additional scripts like MI auth bypass etc,
  2. Get thefastboot image from here select your version (I picked the latest global) click download scroll down where it says "type:fastboot" and click "download: full Rom" the file name should look like this "merlin_images....tgz" or "merlin_global_images....tgz", etc, NOT miui_Merlin.zip,
  3. Get python from the official website site, I tested it with 3.9.7 but the latest version should work fine. Now, you have all the necessary files to start.
  4. Let the phone's battery die so the boot looping completely ends. (else you'll get error STATUS_EXT_RAM_EXCEPTION (0xC0050005) when using SP Flash Tool). ( I also tried it with a full battery and still worked so idk for sure how necessary this step is).
  5. Install Python select the "add to PATH" option, you can test if it was installed correctly by opening cmd and writing "python" or "py" it should output the python version.
  6. Extract the attached zip file and the fastboot image each into their folders.
  7. Enter the MTK Driver folder Install the MTK Driver for MTK SP flash tool.MTK_Driver_Auto_Installer_SP_Drivers_20160804.exe, Reboot your computer.
  8. Enter the python folder, run the "install pyusb pyserial json5.bat" when it's done close the terminal.
  9. Enter the driver folder, this folder contains a USB to COM driver for MTK Devices, right-click the "cdc-acm.inf" click install.
  10. Enter the libusb folder, run the libusb-win32-devel-filter-1.2.6.0.exe file, click next,next...install, when it's done it would prompt you to launch "filter installer wizard" click finish, when the wizard shows up, select "Install a device filter" it would show you your connected USB devices,
  11. Get your phone and a USB cable, connect the USB cable to your computer,while holding the volume up button on your phone connect your phone to the computer (Based on community feedback you might need to hold both up and down volume buttons AND power button!) once your phone turns on you would see your phone listed as "MediaTek USB Port" at the libusb filter installer before your phone reboots click at the "MediaTek USB Port" and then click install if you don't do it on time, your phone will get disconnected because of rebooting, try again re-plugging your phone. once you click install, You should get a pop-up message saying "...device filter successfully installed for MediaTek USB port..." click ok and exit, then remove your phone from the computer.
  12. Enter the bypass folder (This folder contains scripts to bypasses the Mi auth) double click the "1ST RUN THIS.bat" when it says "waiting for device" hold volume up and plug your phone into the computer (btw: You can let the button when it's recognized by the script). now most likely it would say "RuntimeError: unexpected output, expected 0xfd got 0xfe", if it does close the script and disconnect your phone, Try the "2ND RUN THIS.bat" when it shows "Waiting for device" hold volume up and connect your phone to the computer, wait till the console recognizes your phone, (At this part it might take few tries to make it work, try reconnecting your phone without holding any buttons or try holding volume down while reconnecting your phone) Once it gets recognized it would output "Found port = COM3" and Protection disabled. At this part your phone has stopped boot looping which is good but, DO NOT TOUCH YOUR PHONE, DO NOT DISCONNECT IT FROM THE COMPUTER, set your phone aside, and continue with the guide.
  13. Enter the SP Flash Tool folder run the flash_tool.exe at the Download-Agent click choose and select the DA_6765_6785_6768_6873_6885_6853.bin file which is included in the SP flash tool folder.
  14. At the Authentication File, click choose and select the auth_sv5.auth included in the SP flash tool folder.
  15. At the Scatter-loading File, click choose, go to the fastboot image extraction folder (Step 4) then enter the images folder and select the MT6768_Android_scatter.txt file (Fastbootimage/images/MT6768_Android_scatter.txt)
  16. On the drop-downbox below the "Authentication File" label change the option from Download Only to Firmware Upgrade.
  17. At the toolbar above click Options -> Option... go to Connection check the UART option and set the Baud rate to 921600, make sure the com port option is set to com 3, then close the window.
  18. Click Download with the green arrow, now wait till it finished flashing your phone this would take quite of time, at this part DO NOT TOUCH ANYTHING LET IT FINISH TO AVOID ANY CURROPTION ON YOUR PHONE. (If you get "Error : STATUS_STOR_LIFE_EXHAUST" go to options-> general and uncheck Storage life cycle check).
  19. When it's done it would show you a pop-up window "Download Ok" with a green background and a checkmark, click the X to close, and now you can also close the SP Flash tool app.
  20. Disconnect your device from your computer and press the power buttonto start your phone, connect it to a charger or back to the computer since there was no charge so it won't die suddenly now.
  21. Your phone now should boot normally showing the MIUI logo, because its first boot it would take few minutes for the phone to boot, wait patiently and you would see the "first setup" screen.
  22. That's it! You successfully brought back to life a hard-bricked Redmi Note 9 (merlin). A huge weight now has lifted from you :) hf.

Credits:
Bypass script and payload included in the attachment file is provided by (chaosmaster, xyzz) github
 

Attachments

  • unbrickredminote9xda.zip
    99.9 MB · Views: 7,126
Last edited:

aries.1482

Senior Member
Aug 6, 2012
57
6
My device was brick yesterday, OTA update pixel plus ui rom and get boot loop at redmi logo. I do exactly your tutor but in step 11 my device is not recognized. Any solution for me? Thanks.
 

vagelis199

Senior Member
Jun 5, 2014
68
73
My device was brick yesterday, OTA update pixel plus ui rom and get boot loop at redmi logo. I do exactly your tutor but in step 11 my device is not recognized. Any solution for me? Thanks.
If you did step 9 it should recognize it, try to reboot your computer if you didn't already. Also your phone would be visible only for a second before it gets disconnected so you have to act fast.
 

aries.1482

Senior Member
Aug 6, 2012
57
6
Finally, done it. I found this:
- Hold both vol up and down when plug in so the device recognize.
- You must choose right fastboot image (origin stock rom), if not devices can't boot in to miui rom cause bootloader locked after sp flash
And at last, thank you very much, you saved my day.
 
Last edited:
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vagelis199

Senior Member
Jun 5, 2014
68
73
Finally, done it. I found this:
- Hold both vol up and down when plug in so the device recognize.
- You must choose right fastboot image (origin stock rom), if not devices can't boot in to miui rom cause bootloader locked after sp flash
And at last, thank you very much, you saved my day.
Cool ill update the guide!
 

lionfishes

New member
Oct 30, 2021
2
0
Hi, My device is recognized as "Qualcom HS-USB QDLoader 9008" not the "MediaTek USB Port" on step 11 and it seems not recognized on step 12. Do you have any solutions for me. Thanks!
 

nikosefs

Member
Oct 13, 2019
5
2
i made a mistake,when i clicked to download the fastboot at the xiaomi site,i clicked the fastboot link to download,but i didnt see that it brings you to a page where it has all the downloads again,so i stopped the operation and restarted it with the correct scatter this time.

Now im waiting to see what will happen,how long does it usually take for the spflash to finish?
Also at the bottom of spflash where it says 0b/s,emmc etc. should it stay at 0 when you start the download?

edit:
managed to make it work,one important thing for me was at the option/option,had to select com port com 3
 
Last edited:
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Reactions: vagelis199

vagelis199

Senior Member
Jun 5, 2014
68
73
i made a mistake,when i clicked to download the fastboot at the xiaomi site,i clicked the fastboot link to download,but i didnt see that it brings you to a page where it has all the downloads again,so i stopped the operation and restarted it with the correct scatter this time.

Now im waiting to see what will happen,how long does it usually take for the spflash to finish?
Also at the bottom of spflash where it says 0b/s,emmc etc. should it stay at 0 when you start the download?

edit:
managed to make it work,one important thing for me was at the option/option,had to select com port com 3
Thanks i updated the guide including this
 

mrgbuzz

Senior Member
May 27, 2015
194
68
43
Nokia 7 Plus
Redmi Note 9
Looking for some info/help if possible: apologies i'm not trying to derail your thread.
I had bricked my RN9 but managed to unbrick and have it working ok now however I am wanting to restore it/lock the bootloader to allow for using banking apps. But I am encountering an issue. I had tried using MiFlash Tool but during the flash, I get a mismatch error and it doesn't succeed in flashing the Fastboot rom.
If i was to follow your guide from step 13, would this work for me? Or which steps do I need to skip in your list?
Thank you for any advice/help :)
** I finally managed to get it sorted ** used the EDL flash guide and then flashed in SPFT.





 
Last edited:

Aezius26

Member
Nov 29, 2021
7
0
Hi, In this guide, I will teach you how to fix a hard-bricked Redmi Note 9 (merlin) and bring it back to its original state.
How does a hard-bricked Redmi Note 9 look like? it's stuck in an infinite boot loop showing only the Redmi logo,
Can't access recovery with power+vol down, can't enter fastboot, can't connect it to a computer either.

If this is your phone here's how you can solve it without the need for service.

Following this guide keep in mind that everything would be erased from your phone including custom Recovery or ROM obviously. Also the bootloader would get locked again.
(I mean at this point you either have a unless brick or a working phone, you are choosing).


This is tested by me, and it works as long as you follow the steps carefully and you don't skip anything.
(I did this on Windows 10 btw)


  1. You gonna need to download, Python and the official Xiaomi fastboot image for Redmi Note 9. Also the zip file I'm attaching bellow. the zip file contains the MTK Drivers, SP Flash Tool, and some additional scripts like MI auth bypass etc,
  2. Get the fastboot image from here select your version (I picked the latest global) click download scroll down where it says "type:fastboot" and click "download: full Rom" the file name should look like this "merlin_images....tgz" or "merlin_global_images....tgz", etc, NOT miui_Merlin.zip,
  3. Get python from the official website site, I tested it with 3.9.7 but the latest version should work fine. Now, you have all the necessary files to start.
  4. Let the phone's battery die so the boot looping completely ends. (I'm not sure if this is completely necessary but that's how I did it).
  5. Install Python select the "add to PATH" option, you can test if it was installed correctly by opening cmd and writing "python" or "py" it should output the python version.
  6. Extract the attached zip file and the fastboot image each into their folders.
  7. Enter the MTK Driver folder Install the MTK Driver for MTK SP flash tool. MTK_Driver_Auto_Installer_SP_Drivers_20160804.exe, Reboot your computer.
  8. Enter the python folder, run the "install pyusb pyserial json5.bat" when it's done close the terminal.
  9. Enter the driver folder, this folder contains a USB to COM driver for MTK Devices, right-click the "cdc-acm.inf" click install.
  10. Enter the libusb folder, run the libusb-win32-devel-filter-1.2.6.0.exe file, click next,next...install, when it's done it would prompt you to launch "filter installer wizard" click finish, when the wizard shows up, select "Install a device filter" it would show you your connected USB devices,
  11. Get your phone and a USB cable, connect the USB cable to your computer, while holding the volume up button on your phone connect your phone to the computer (Based on community feedback you might need to hold both up and down volume buttons) once your phone turns on you would see your phone listed as "MediaTek USB Port" at the libusb filter installer before your phone reboots click at the "MediaTek USB Port" and then click install if you don't do it on time, your phone will get disconnected because of rebooting, try again re-plugging your phone. once you click install, You should get a pop-up message saying "...device filter successfully installed for MediaTek USB port..." click ok and exit, then remove your phone from the computer.
  12. Enter the bypass folder (This folder contains scripts to bypasses the Mi auth) double click the "1ST RUN THIS.bat" when it says "waiting for device" hold volume up and plug your phone into the computer (btw: You can let the button when it's recognized by the script). now most likely it would say "RuntimeError: unexpected output, expected 0xfd got 0xfe", if it does close the script and disconnect your phone, Try the "2ND RUN THIS.bat" when it shows "Waiting for device" hold volume up and connect your phone to the computer, wait till the console recognizes your phone, (At this part it might take few tries to make it work, try reconnecting your phone without holding any buttons or try holding volume down while reconnecting your phone) Once it gets recognized it would output "Found port = COM3" and Protection disabled. At this part your phone has stopped boot looping which is good but, DO NOT TOUCH YOUR PHONE, DO NOT DISCONNECT IT FROM THE COMPUTER, set your phone aside, and continue with the guide.
  13. Enter the SP Flash Tool folder run the flash_tool.exe at the Download-Agent click choose and select the DA_6765_6785_6768_6873_6885_6853.bin file which is included in the SP flash tool folder.
  14. At the Authentication File, click choose and select the auth_sv5.auth included in the SP flash tool folder.
  15. At the Scatter-loading File, click choose, go to the fastboot image extraction folder (Step 4) then enter the images folder and select the MT6768_Android_scatter.txt file (Fastbootimage/images/MT6768_Android_scatter.txt)
  16. On the drop-down box below the "Authentication File" label change the option from Download Only to Firmware Upgrade.
  17. At the toolbar above click Options -> Option... go to Connection check the UART option and set the Baud rate to 921600, make sure the com port option is set to com 3, then close the window.
  18. Click Download with the green arrow, now wait till it finished flashing your phone this would take quite of time, at this part DO NOT TOUCH ANYTHING LET IT FINISH TO AVOID ANY CURROPTION ON YOUR PHONE.
  19. When it's done it would show you a pop-up window "Download Ok" with a green background and a checkmark, click the X to close, and now you can also close the SP Flash tool app.
  20. Disconnect your device from your computer and press the power button to start your phone, connect it to a charger or back to the computer since there was no charge so it won't die suddenly now.
  21. Your phone now should boot normally showing the MIUI logo, because its first boot it would take few minutes for the phone to boot, wait patiently and you would see the "first setup" screen.
  22. That's it! You successfully brought back to life a hard-bricked Redmi Note 9 (merlin). A huge weight now has lifted from you :) hf.

Credits:
Bypass script and payload included in the attachment file is provided by (chaosmaster, xyzz) github
Hi thanks a lot for your help. I accidentally flashed a redmi 10x miui 11, wanted to downgrade my Redmi 9 from 12.5, bad perfomance, resulting in your hard-bricked version. Flashing last fastboot version doesn't help, do i have a chance to fix it?
 

Coroneln

Member
Dec 7, 2021
6
4
  1. Get the fastboot image from here select your version (I picked the latest global) click download scroll down where it says "type:fastboot" and click "download: full Rom" the file name should look like this "merlin_images....tgz" or "merlin_global_images....tgz", etc, NOT miui_Merlin.zip,


Hi and thanks for this detailed guide.

I bricked my merlin trying to root it (long history trying to get TWRP to stick)

I am now in the redmi logo loop and i am trying to follow this with great care.

however in the step above, no matter what I choose in "Yshasalger" page, i end up with a Recovery ROM and the file name contains the miui prefix as opposed to what you clearly state.

see image:


1638867227946.png




I am asking because i am scared of making more mistakes.


So i guess my question is if someone can check it happens to them (maybe the page changed since the writting of this guide)

If i should try with that ROM zip file or if there is another place i can get the proper one


I want to if possible to flash an older MIUI / Android than the latest 12 xxx / Android 11 as i find the phone to be really slow since the last OTA update.
 

vagelis199

Senior Member
Jun 5, 2014
68
73
Hi and thanks for this detailed guide.

I bricked my merlin trying to root it (long history trying to get TWRP to stick)

I am now in the redmi logo loop and i am trying to follow this with great care.

however in the step above, no matter what I choose in "Yshasalger" page, i end up with a Recovery ROM and the file name contains the miui prefix as opposed to what you clearly state.

see image:


View attachment 5476667



I am asking because i am scared of making more mistakes.


So i guess my question is if someone can check it happens to them (maybe the page changed since the writting of this guide)

If i should try with that ROM zip file or if there is another place i can get the proper one


I want to if possible to flash an older MIUI / Android than the latest 12 xxx / Android 11 as i find the phone to be really slow since the last OTA update.
That's because you are choosing recovery and not fastboot, choose fastboot as type scroll down it has two links for recovery and for fastboot image. Check the file name
 

Coroneln

Member
Dec 7, 2021
6
4
That's because you are choosing recovery and not fastboot, choose fastboot as type scroll down it has two links for recovery and for fastboot image. Check the file name
i promise i am choosing fastboot but it ends up in the recovery i have tried several different versions in case it was a file wrongly indexed.
 

Coroneln

Member
Dec 7, 2021
6
4
TL|DR

Python errors, step 8 and 12 on Windows 10


  1. Go to -> "start" and type "Manage App Execution Aliases". Go to it and turn off "Python"
=========================

Now read....


Just in case someone has trouble with step: 8

Escenario: the BAT file calls `python` and in some windows 10 this will result in a message about the windows store (Even if the path is added)

Python was not found; run without arguments to install from the Microsoft Store, or disable this shortcut from Settings

but `py` works, so just edit the BAT file and replace the call for `python` with `py` it will install all the python modules with no errors.

EDIT:
This also affects step: 12

Found a solution here: https://stackoverflow.com/questions...arguments-to-install-from-the-microsoft-store

  1. Go to -> "start" and type "Manage App Execution Aliases". Go to it and turn off "Python"

The error:
1638873314158.png


After editing the BAT file replacing `python` with `py`
1638873241436.png
 
Last edited:

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  • 1
    Did you try playing around with the buttons? Try pushing the three buttons at the same time before running "2nd run this.bat" (just a moment before insertion of cable) because pushing unorthodoxly worked for me. Try also pushing only some of the buttons
    Hey, thanks for the awesome guide! I also have this problem:


    and this



    Like user Kain105 I tryed deleting and reinstalling the device filter but it had no effect. Same output and problem again when I run the "2ND RUN THIS.bat" script. The result is that i can not choose COM 3 in the connection options in the flash tool!

    When i run the "1ST RUN THIS.bat" I always get the output which user KemZam postet.

    Please help!
    1
    prima di tutto, assicurati che la 'path' di python ci sia e oltretutto sia corretta ...
    > vai icona 'QUESTO PC' / tasto dx / proprieta' / impostazioni di sistema avanzato / variabili d'ambiente /
    bene ora qui abbiamo 2 sezioni :
    'variabili dell'utente per 'QUESTO PC'
    'variabili di sistema'
    In entrambi ce' la riga : 'path'
    ora dai 'modifica' in entrambe le righe path (sezioni sia sopra che sotto)
    dentro devi trovare 2 path riguardanti python, se non le trovi le devi creare a nuovo, l'importante e' che la path sia corretta, questa e' quella che normalmente viene creata :
    c:\users\QUESTO PC\appdata\programs\python\python311\
    c:\users\QUESTO PC\appdata\programs\python\python311\scripts\
    per ultima riga sposta con i pulsanti a lato su/giu la riga che riguarda lo store-app di /microsoftApp , mettila in ultima posizione altrimenti se lanci il comando python ti si apre la app dello store microsoft
    Controlla e se necessario aggiungi queste 2 path in entrambe le sezioni 'variabili dell'utente per 'QUESTO PC' ed anche 'variabili di sistema'
    riavvia
    ora se apri il terminale/prompt dei comandi e lanci il comando python ti dovrebbe risultare 'python 3.11.1 (tags.... etc.' , stessa cosa lanciando il comando py
    questo significa che python funziona correttamente, ora se il file.bat che vuoi lanciare da' problemi, che ti frega, lancia il comando manualmente, se lo apri con block-note dentro dovrebbero esserci questi comandi, lanciali cosi da prompt dei comandi :
    pip3 install pyusb
    pip3 install pyserial
    pip3 install json5
    and then u r good to go ...
    1
    Did you try playing around with the buttons? Try pushing the three buttons at the same time before running "2nd run this.bat" (just a moment before insertion of cable) because pushing unorthodoxly worked for me. Try also pushing only some of the buttons
    Awesome, thank you! Pushing Volume up + Volume Down together before inserting the cable and using the second script worked for me now!
    1
    Prima di fare cio, devi avere completato l'accoppiamento con LIBUSB-WIN32 e fatto il wizard accoppiando il cell a MEDIATEK USB VCOM PORT (per fare cio' DISATTIVA WINDOWS VIRUS PROTECTION POI ESEGUI IL WIZARD PER INSTALLARE IL FILTRO!!!!)
    A volte capita che al primo colpo non funzia, io di solito me la cavavo iniziando con cell spento, oppure mettendo il cell in modalita' fastboot con cavo usb staccato, lanciavo il 2ND RUN THIS.bat, poi mantenevo premuto tasto power+volume-giu, e appena la figura di android scompariva attaccavo il cavo usb e lasciavo power e subito dopo volume-giu, questa e' la prova del 9, se cosi non ti funziona, chiedi a loro che sono piu' bravi ma haime anche molto difficile che rispondano, sempre e solo in inglese !!
    1
    Hello! Everything is working expect step 12
    Its not about recongizing
    1673372829495.png

    There are some error going on
    ModuleNotFoundError: No module named 'serial'
    Someone help?

    EDIT: I fixed it, i just had to uninstall python and install python 3.8, cause i had 3.11 installed
    THANK YOU SO MUCH FOR MAKING THIS GUIDE
    You saved me around 1000 ZŁ for service ( Polish Złoty )
    I love you!
    Dziękuję jeszcze raz!
  • 51
    guide_img.jpg


    A how-to guide of restoring a completely bricked Redmi Note 9​


    Hi, In this guide, I will teach you how to fix a hard-bricked Redmi Note 9 (merlin) and bring it back to its original state.
    How does a hard-bricked Redmi Note 9 look like? it's stuck in an infinite boot loop showing only the Redmi logo,
    Can't access recovery with power+vol down, can't enter fastboot, can't connect it to a computer either.

    If this is your phone here's how you can solve it without the need for service.

    Following this guide keep in mind that everything would be erased from your phone including custom Recovery or ROM obviously. Also the bootloader would get locked again.
    (I mean at this point you either have a useless brick or a working phone, you are choosing).


    This is tested by me, and it works as long as you follow the steps carefully and you don't skip anything.
    (I did this on Windows 10 btw)


    1. You gonna need to download, Python and the official Xiaomi fastboot image for Redmi Note 9. Also the zip file I'm attaching bellow. the zip file contains the MTK Drivers, SP Flash Tool, and some additional scripts like MI auth bypass etc,
    2. Get thefastboot image from here select your version (I picked the latest global) click download scroll down where it says "type:fastboot" and click "download: full Rom" the file name should look like this "merlin_images....tgz" or "merlin_global_images....tgz", etc, NOT miui_Merlin.zip,
    3. Get python from the official website site, I tested it with 3.9.7 but the latest version should work fine. Now, you have all the necessary files to start.
    4. Let the phone's battery die so the boot looping completely ends. (else you'll get error STATUS_EXT_RAM_EXCEPTION (0xC0050005) when using SP Flash Tool). ( I also tried it with a full battery and still worked so idk for sure how necessary this step is).
    5. Install Python select the "add to PATH" option, you can test if it was installed correctly by opening cmd and writing "python" or "py" it should output the python version.
    6. Extract the attached zip file and the fastboot image each into their folders.
    7. Enter the MTK Driver folder Install the MTK Driver for MTK SP flash tool.MTK_Driver_Auto_Installer_SP_Drivers_20160804.exe, Reboot your computer.
    8. Enter the python folder, run the "install pyusb pyserial json5.bat" when it's done close the terminal.
    9. Enter the driver folder, this folder contains a USB to COM driver for MTK Devices, right-click the "cdc-acm.inf" click install.
    10. Enter the libusb folder, run the libusb-win32-devel-filter-1.2.6.0.exe file, click next,next...install, when it's done it would prompt you to launch "filter installer wizard" click finish, when the wizard shows up, select "Install a device filter" it would show you your connected USB devices,
    11. Get your phone and a USB cable, connect the USB cable to your computer,while holding the volume up button on your phone connect your phone to the computer (Based on community feedback you might need to hold both up and down volume buttons AND power button!) once your phone turns on you would see your phone listed as "MediaTek USB Port" at the libusb filter installer before your phone reboots click at the "MediaTek USB Port" and then click install if you don't do it on time, your phone will get disconnected because of rebooting, try again re-plugging your phone. once you click install, You should get a pop-up message saying "...device filter successfully installed for MediaTek USB port..." click ok and exit, then remove your phone from the computer.
    12. Enter the bypass folder (This folder contains scripts to bypasses the Mi auth) double click the "1ST RUN THIS.bat" when it says "waiting for device" hold volume up and plug your phone into the computer (btw: You can let the button when it's recognized by the script). now most likely it would say "RuntimeError: unexpected output, expected 0xfd got 0xfe", if it does close the script and disconnect your phone, Try the "2ND RUN THIS.bat" when it shows "Waiting for device" hold volume up and connect your phone to the computer, wait till the console recognizes your phone, (At this part it might take few tries to make it work, try reconnecting your phone without holding any buttons or try holding volume down while reconnecting your phone) Once it gets recognized it would output "Found port = COM3" and Protection disabled. At this part your phone has stopped boot looping which is good but, DO NOT TOUCH YOUR PHONE, DO NOT DISCONNECT IT FROM THE COMPUTER, set your phone aside, and continue with the guide.
    13. Enter the SP Flash Tool folder run the flash_tool.exe at the Download-Agent click choose and select the DA_6765_6785_6768_6873_6885_6853.bin file which is included in the SP flash tool folder.
    14. At the Authentication File, click choose and select the auth_sv5.auth included in the SP flash tool folder.
    15. At the Scatter-loading File, click choose, go to the fastboot image extraction folder (Step 4) then enter the images folder and select the MT6768_Android_scatter.txt file (Fastbootimage/images/MT6768_Android_scatter.txt)
    16. On the drop-downbox below the "Authentication File" label change the option from Download Only to Firmware Upgrade.
    17. At the toolbar above click Options -> Option... go to Connection check the UART option and set the Baud rate to 921600, make sure the com port option is set to com 3, then close the window.
    18. Click Download with the green arrow, now wait till it finished flashing your phone this would take quite of time, at this part DO NOT TOUCH ANYTHING LET IT FINISH TO AVOID ANY CURROPTION ON YOUR PHONE. (If you get "Error : STATUS_STOR_LIFE_EXHAUST" go to options-> general and uncheck Storage life cycle check).
    19. When it's done it would show you a pop-up window "Download Ok" with a green background and a checkmark, click the X to close, and now you can also close the SP Flash tool app.
    20. Disconnect your device from your computer and press the power buttonto start your phone, connect it to a charger or back to the computer since there was no charge so it won't die suddenly now.
    21. Your phone now should boot normally showing the MIUI logo, because its first boot it would take few minutes for the phone to boot, wait patiently and you would see the "first setup" screen.
    22. That's it! You successfully brought back to life a hard-bricked Redmi Note 9 (merlin). A huge weight now has lifted from you :) hf.

    Credits:
    Bypass script and payload included in the attachment file is provided by (chaosmaster, xyzz) github
    2
    View attachment 5563587

    A how-to guide of restoring a completely bricked Redmi Note 9​


    Hi, In this guide, I will teach you how to fix a hard-bricked Redmi Note 9 (merlin) and bring it back to its original state.
    How does a hard-bricked Redmi Note 9 look like? it's stuck in an infinite boot loop showing only the Redmi logo,
    Can't access recovery with power+vol down, can't enter fastboot, can't connect it to a computer either.

    If this is your phone here's how you can solve it without the need for service.

    Following this guide keep in mind that everything would be erased from your phone including custom Recovery or ROM obviously. Also the bootloader would get locked again.
    (I mean at this point you either have a useless brick or a working phone, you are choosing).


    This is tested by me, and it works as long as you follow the steps carefully and you don't skip anything.
    (I did this on Windows 10 btw)


    1. You gonna need to download, Python and the official Xiaomi fastboot image for Redmi Note 9. Also the zip file I'm attaching bellow. the zip file contains the MTK Drivers, SP Flash Tool, and some additional scripts like MI auth bypass etc,
    2. Get thefastboot image from here select your version (I picked the latest global) click download scroll down where it says "type:fastboot" and click "download: full Rom" the file name should look like this "merlin_images....tgz" or "merlin_global_images....tgz", etc, NOT miui_Merlin.zip,
    3. Get python from the official website site, I tested it with 3.9.7 but the latest version should work fine. Now, you have all the necessary files to start.
    4. Let the phone's battery die so the boot looping completely ends. (else you'll get error STATUS_EXT_RAM_EXCEPTION (0xC0050005) when using SP Flash Tool). ( I also tried it with a full battery and still worked so idk for sure how necessary this step is).
    5. Install Python select the "add to PATH" option, you can test if it was installed correctly by opening cmd and writing "python" or "py" it should output the python version.
    6. Extract the attached zip file and the fastboot image each into their folders.
    7. Enter the MTK Driver folder Install the MTK Driver for MTK SP flash tool.MTK_Driver_Auto_Installer_SP_Drivers_20160804.exe, Reboot your computer.
    8. Enter the python folder, run the "install pyusb pyserial json5.bat" when it's done close the terminal.
    9. Enter the driver folder, this folder contains a USB to COM driver for MTK Devices, right-click the "cdc-acm.inf" click install.
    10. Enter the libusb folder, run the libusb-win32-devel-filter-1.2.6.0.exe file, click next,next...install, when it's done it would prompt you to launch "filter installer wizard" click finish, when the wizard shows up, select "Install a device filter" it would show you your connected USB devices,
    11. Get your phone and a USB cable, connect the USB cable to your computer,while holding the volume up button on your phone connect your phone to the computer (Based on community feedback you might need to hold both up and down volume buttons AND power button!) once your phone turns on you would see your phone listed as "MediaTek USB Port" at the libusb filter installer before your phone reboots click at the "MediaTek USB Port" and then click install if you don't do it on time, your phone will get disconnected because of rebooting, try again re-plugging your phone. once you click install, You should get a pop-up message saying "...device filter successfully installed for MediaTek USB port..." click ok and exit, then remove your phone from the computer.
    12. Enter the bypass folder (This folder contains scripts to bypasses the Mi auth) double click the "1ST RUN THIS.bat" when it says "waiting for device" hold volume up and plug your phone into the computer (btw: You can let the button when it's recognized by the script). now most likely it would say "RuntimeError: unexpected output, expected 0xfd got 0xfe", if it does close the script and disconnect your phone, Try the "2ND RUN THIS.bat" when it shows "Waiting for device" hold volume up and connect your phone to the computer, wait till the console recognizes your phone, (At this part it might take few tries to make it work, try reconnecting your phone without holding any buttons or try holding volume down while reconnecting your phone) Once it gets recognized it would output "Found port = COM3" and Protection disabled. At this part your phone has stopped boot looping which is good but, DO NOT TOUCH YOUR PHONE, DO NOT DISCONNECT IT FROM THE COMPUTER, set your phone aside, and continue with the guide.
    13. Enter the SP Flash Tool folder run the flash_tool.exe at the Download-Agent click choose and select the DA_6765_6785_6768_6873_6885_6853.bin file which is included in the SP flash tool folder.
    14. At the Authentication File, click choose and select the auth_sv5.auth included in the SP flash tool folder.
    15. At the Scatter-loading File, click choose, go to the fastboot image extraction folder (Step 4) then enter the images folder and select the MT6768_Android_scatter.txt file (Fastbootimage/images/MT6768_Android_scatter.txt)
    16. On the drop-downbox below the "Authentication File" label change the option from Download Only to Firmware Upgrade.
    17. At the toolbar above click Options -> Option... go to Connection check the UART option and set the Baud rate to 921600, make sure the com port option is set to com 3, then close the window.
    18. Click Download with the green arrow, now wait till it finished flashing your phone this would take quite of time, at this part DO NOT TOUCH ANYTHING LET IT FINISH TO AVOID ANY CURROPTION ON YOUR PHONE. (If you get "Error : STATUS_STOR_LIFE_EXHAUST" go to options-> general and uncheck Storage life cycle check).
    19. When it's done it would show you a pop-up window "Download Ok" with a green background and a checkmark, click the X to close, and now you can also close the SP Flash tool app.
    20. Disconnect your device from your computer and press the power buttonto start your phone, connect it to a charger or back to the computer since there was no charge so it won't die suddenly now.
    21. Your phone now should boot normally showing the MIUI logo, because its first boot it would take few minutes for the phone to boot, wait patiently and you would see the "first setup" screen.
    22. That's it! You successfully brought back to life a hard-bricked Redmi Note 9 (merlin). A huge weight now has lifted from you :) hf.

    Credits:
    Bypass script and payload included in the attachment file is provided by (chaosmaster, xyzz) github
    thank you so much it worked with redmi 9
    some differences :
    - i use windows 11
    - no need to wait to drain the battery just hold volume down and power key for redmi 9
    - python latest version 3.11 didn't work but windows store version 3.10 worked
    - and of course i downloaded the fastboot for redmi 9
    2
    Had to create an account just to thank the OP

    I bricked my Redmi note 9 by trying to install twrp using an outdated tutorial , had access to nothing , was already planning on spending money I shouldn't getting another phone at the moment. Then I stumbled upon this thread.

    You are a god mate! Really appreciate the help.
    2
    i'm having an ERROR notification : STATUS_EXT_RAM_EXCEPTION (0xC0050005) help me
    2
    When you are choosing fastboot it shows you both recovery and fastboot as options, one is above the other, fastboot is bellow recovery , if you scroll down you'll see the link for the fastboot image
    Thanks, that is what i was missing.


    Edit:

    Thanks @vagelis199 this detailed guide and your input earlier saved my bricked Merlin.


    Following the guide, I downgraded it to Android 10 MIUI 11 in hopes of now rooting the darn thing and remove the Xiaomi bloat and ads