[LG Optimus L3 II, L5 II, L7 II, L9 II] neutrondev:
Hello to you all. Since I got a new device (LG G3) I thought it will be cool to write an in-depth guide about recovering a hard-bricked L7 II. Our guinea pig will be my P710. All devices have the same internals. I will write up when you need to do something different depending on your model. This will work for the people that flashed a P700 image and lost Emergency Mode. This will probably work in any hard-brick unless your eMMC failed or it is broken (physically).

FOR THE PEOPLE THAT FLASHED L7 FIRMWARE ON L7 II AND HAVE THE ODD EMERGENCY MODE AND CAN STILL SEE ANYTHING ON THE SCREEN INSTEAD OF THE OPENING AND SHORTING PINS GO HERE: http://xdaforums.com/optimus-l3-l5-l7-l9-ii/general/unbrick-lg-l7-ii-flashed-l7-firmware-t3177181. Follow the Steps there and then return to this tutorial to the QDL 9008 part.

The original tutorial for this unbrick was made available on 4pda (Thank you very much guys; Your names will be in the credits area). Also some of the files (most of them) are from 4pda (Thanks again).

This is not exactly the same tutorial. I changed some things and I made some things my own way.

This is not a beginner friendly task but I will write it very in-dept (still not step-by-step). Very low skills are required though: follow exact directions, read carefully and don't do stuff because you think it is good.

I am not responsible for any damage to your phone, if you get fired from your job because your alarm clock failed or you destroyed your device even further. YOU TAKE THIS ACTIONS AND IT IS YOUR OWN RISK. I CANNOT BE HELD RESPONSIBLE FOR ANY OF THIS ACTIONS. This tutorial includes parts that might be illegal in some states (like changing IMEI back to your device one). If you are in one of those states please skip this. IMEI change is illegal (well, I am not a rule breaker but we are just gonna restore our default IMEI).

This Tutorial will be divided in parts:

1. Needed tools/drivers and preparation

2. Opening the phone and exposing the motherboard

3. Getting the device into QDL Mode 9008

4. Flashing the MBR, EBR and the main bootloaders

5. Flashing the phone as a Hard Drive in QDL Mode 9006 (Raw MMC Access)

6.1. Flashing a Pre-Rooted Image

6.2 Restoring the default Emergency Mode

6.3 Restoring original IMEI (if this is legal in your state)

7. Flashing your desired KDZ for your phone model.

1. Needed tools/drivers and preparation

Physical tools:

Frearson (Star) Screwdriver 2.0mm

Plastic Opening Tool

A cooper wire (not very big in diameter that is very sharp at 1 end)

USB Cable

Optional: A Loupe and a Motherboard Holder

Optional: A tool for releasing the plugs on the motherboard

This are my tools and of course the USB Cable.

Software:

LG Drivers

Adb for Windows

KDZ Flasher

QDL Drivers (32 and 64 bit)

QPST Tools (Qualcomm Service Tools)

MBR and BL Repair

EMMC RAW WRITER

HxD Hex Editor for Windows

Root.kdz

Stock_Emergency.rar

IMEI_Single.qcn

IMPORTANT: During all this tutorial RUN ALL PROGRAMS WITH RIGHT CLICK "Run As Administrator"

Download all the software and install Adb for Windows and LG Drivers and restart your computer.

VERY IMPORTANT STEP: When restarting and booting-up keep hitting F8 and get to the Advanced Boot Menu. Go down and hit “Disable Driver Signature Enforcement.” (AFTER THIS STEP DO NOT RESTART COMPUTER; It will temporary disable driver signature since QDL drivers are not digitally signed).

2. Opening the phone and exposing the motherboard

Open the back cover and plug out the battery. Plug out the Sim Card and Sd Card if you have any plugged. Using your screwdriver unscrew this screws.

Insert your opening tool (it must be a plastic tool like in the photo) above the power button and gently move it all across the cover so you unclip it. You can then lift off the cover and you will see the phone motherboard. If you get stuck in the case then lift up and down gently. Remove the 3 buttons and put them safe. (Power, Quick Memo, Volume).

Now remove the 7 connectors like in the image. CAREFUL. IF YOU DAMAGE ANY OF THEM YOU WILL LOSE THEIR FUNCTIONALITY. THERE IS NO WAY TO REPAIR IT. THEY SHOULD COME OFF EASY. Use your tool or your nail but with great care.

After that lift the motherboard (the green one) while you gently pull the connectors out of the way. Turn the motherboard on the other side and you will see something like this.

Hold the board in your hand and you will see the space above the battery connector. Pull gently with your nail until you hear it uncliping .

Turn it on the other side (not on the back, just rotate). You will see another space pull it up like you did it first time and pull the heatskin off. You will see something like this.

After this plug just connector number 1 and turn the motherboard on the other side (motherboard should not stay on connector number 3 you should pull that away when you turn the board.

We are done with this step