[LeEco Le Pro3 Questions & Answers] tsongming:
Lineage didn't cause the brick something else did, mostly something like a xposed module corrupted the bootloader.

The reason that it isn't working is because of the timing of connecting the phone to the computer and possibly do to Windows itself. So unplug anything that is not needed, such as external hard drives. Plug your phone USB cable into the back of your desktop ( those ports usually have more power)

GATHER YOUR FILES

Download the correct Qfil: le_zl1_qfil_ufs_fix (1) ( Its in the thread)

Flash 2.0

Update android Drivers on PC, and turn on test signing.

PREPARING YOUR COMPUTER

* Temporarily disable your internet connection, and unplug your phone from computer.

* Install the latest*.net Framework*: https://www.microsoft.com/en-us/download/details.aspx?id=30653

After installing Net Framework,

* Start with a fresh

* Uninstall*android drivers, and Qualcomm drivers

* First uninstall from Control Panel>System> Device Manager*

* Next uninstall from Program Manager.

*TEST SIGNING Boot Configuration Option ( Paraphrased from From Here : https://docs.microsoft.com/en-us/wi...all/the-testsigning-boot-configuration-option

The port issue could stem from a driver fail or because of a "signing error" so follow steps below to enter test signing mode

Open the Windows command prompt as “Run as Administrator”.

Run “bcdedit -set loadoptions “DISABLE_INTEGRITY_CHECKS” (without the “”).

To finalize the process run “bcdedit -set “TESTSIGNING ON” (without the “”).

Reboot and reinstall all required drivers, previously mentioned.

Next

After installation, connect Phone to PC using USB cable.

While connecting to PC, phone should be switched off and press volume up & down and power simultaneously.

If it makes Qualcomm port, then driver has been successfully installed. ( Here: control panel/system/device manager)

If the right Qualcomm driver is installed on your computer, you should see the phone listed as a Qualcomm HS-USB QLoader 9008 or incorrectly listed as Qualcomm HS-USB Diagnostics 900E both within settings and device manager. )

If your device is showing Qualcomm HS-USB diagnostics 900E(COM4) , then you are not in the correct Qualcomm mode.

When device shows Qualcomm HS USB 9008 then use flash 2.0 to flash your ROM

1) To enter Qualcomm Recovery mode, first turn off the phone and go to step 2

2) Keep pressed Vol Up (+) and Vol Down (-) together and connect the phone by USB cable to the computer.

3) You will see that the computer will install drivers for "Qualcomm HS-USB QDLoader 9008".

4) Unzip FlashOne and start "main.exe". Once you've opened the flash-tool you'll see "Flash Type". Here select "Qualcomm - flash dead phone".

5) Select your phone - "COM ..." from "Select device" - here should be the same COM ... as it shown in Device Manager under Ports (COM & LPT) > "Qualcomm HS-USB QDLoader 9008 (COM ...)"

6) Select File the QFIL from the folder where it is saved

7) Press "Flash" in the lower part of the window

8) Once completed, disconnect the phone and power it up

9) Go to Settings – Storage format the internal storage.

So that is how you unbrick. If you would rather have a visual guide the link below may be easier for you.

Gather your files and follow the spets on this link:

https://www.androidbrick.com/leeco-letv-x820-max-2-qdloader-9008-unbrick-twrpguide/

Yes , the link is for the Max 2...But, the steps are identical!

Remember to only use the files for the your device and the only Qfil that will work is : Qfil: le_zl1_qfil_ufs_fix ( Note X727 users) Update X722 users need Qfil from [MENTION=1227203]F.L[/MENTION].V.

Good Luck, be patient, the first time unbricking can take a little while.

PS:

Please Do not spam my PM box, these are the only instructions that you need there is nothing more beyond this.

If you have an issue: its either your cable, computer or hardware. Some X727 owners have had success with using Qfil but have a black screen still : If you have this issue, your LCD needs to be replaced.