Hard Bricked oneplus 8t not starting EDL mode

[Reo0o]

Hi everybody,

I've Oneplus 8t kb2003 updated to the last ota firmware 13.1.
I tried to downgrade it to 13 by flashing full OTA payload.bin using fastboot enhance app but unfortunately the device is bricked.

Usually when such thing happen I boot the EDL mode and use msm tool to unbrick it which worked for me couple years before but for some reason the device is not detected at all on EDL mode!

The device manager not showing any thing called qualcomm even the msm tool not detecting any thing.

I tried to redownload the qualcomm driver and followed all instructions in this link , used 3rd party cables and the original cable and changed ports but nothing happens

It's like the phone is completely dead

any ideas how to get out of this mess ?

 

[Rootk1t]

Hi everybody,

I've Oneplus 8t kb2003 updated to the last ota firmware 13.1.
I tried to downgrade it to 13 by flashing full OTA payload.bin using fastboot enhance app but unfortunately the device is bricked.

Usually when such thing happen I boot the EDL mode and use msm tool to unbrick it which worked for me couple years before but for some reason the device is not detected at all on EDL mode!

The device manager not showing any thing called qualcomm even the msm tool not detecting any thing.

I tried to redownload the qualcomm driver and followed all instructions in this link , used 3rd party cables and the original cable and changed ports but nothing happens

It's like the phone is completely dead

any ideas how to get out of this mess ?

Install all the necessary drivers and use MSM tool to restore your phone.

[OP8T][OOS KB05AA/BA/DA] Unbrick tool to restore your device to OxygenOS

Disclaimer: By attempting any of the processes listed in this thread you accept full responsibility for your actions. I will not be held responsible if your device stops working, catches fire, or turns into a hipster and claims to have been...

forum.xda-developers.com

P.S: Don't use fastboot enhance app, as it wasn't updated for quite some time and was reason of bricking several phones after flashing.

 

[TheNewHEROBRINE]

If you used Fastboot Enhance it could have flashed the wrong xbl file for your RAM type. If is it so, the only thing you can try is a deep flash cable or shorting the test pins on the motherboard.