[G2 General] Partager.info:
First of all i must thank [MENTION=2413393]Shelnutt2[/MENTION] from lg-g2 irc channel who helped me to unbrick my phone and get it back alive. The whole process described bellow came from him.

Description of the problem:

Your LG G2 D802 is living this situation:

1- Rooted and got OTA

2- No Download mode

3- No recovery mode

4- Secure booting error

5- LG detected as qhsusb_bulk in device manager

6- When you boot your device it shows only LG logo with secure booting error, then the screen goes black while your phone is still on.

7- Other symptoms :)

The only solution for you is the following.

I'll explain the solution for an LG G2 D802 10a, then you can apply it for your device model by downloading the appropriate files.

You will need to use linux.

Ubuntu is good enough to make the job. You can use a virtual machine, live cd or a bootable usb stick.

So lets start.

Files to download from here

VERY IMPORTANT!!!!!!!

You must use the img files that correspond to the ROM you have installed before getting the problem to avoid breaking your phone. The link above is for 10b_EUR_16G firmware version. So don't use those files if your firmware version was not that one. Instead you should look for img files corresponding to the current version installed in your phone. If you don't know what version you've installed then don't use this method because you will break your phone.

1- sbl1.img

2- aboot.img

3- rpm.img

4- tz.img

5- openrecovery-twrp-2.6.3.2-g2d802

Thanks to [MENTION=5877085]sabooakhte[/MENTION] who has shared his experience:

Now just boot into ubuntu and plug your LG G2 to the computer.

Put the downloaded files in the desktop or wherever you want. You just need to know the path to your files.

unplug any other usb device except your mouse, keyboard and lg g2.

Open terminal in ubuntu then type:

ls /dev/sd*

It should return something like this:

In this case your device is detected under sdb. you may have it under sdc. just look for the biggest number, in this case /dev/sdb36 so it is sdb.

Linux keeps poping up error message "unable to mount..."? follow this solution by [MENTION=5631294]priority3[/MENTION]

now, according to the result of the first command type the following:

gdisk -l /dev/sdb

you will get result:

Number Start (sector) End (sector) Size Code Name
1 32768 163839 64.0 MiB 0700 modem
[COLOR="Red"]2 163840 165887 1024.0 KiB FFFF sbl1[/COLOR]
3 165888 166911 512.0 KiB FFFF dbi
4 196608 197631 512.0 KiB FFFF DDR
[COLOR="red"]5 229376 231423 1024.0 KiB FFFF aboot[/COLOR]
[COLOR="red"] 6 231424 233471 1024.0 KiB FFFF rpm[/COLOR]
7 262144 294911 16.0 MiB FFFF boot
[COLOR="red"] 8 294912 296959 1024.0 KiB FFFF tz[/COLOR]
9 296960 296961 1024 bytes 0700 pad
10 327680 333823 3.0 MiB FFFF modemst1
11 333824 339967 3.0 MiB FFFF modemst2
12 339968 339969 1024 bytes FFFF pad1
13 360448 393215 16.0 MiB FFFF misc
14 393216 458751 32.0 MiB 0700 persist
[COLOR="red"]15 458752 491519 16.0 MiB FFFF recovery[/COLOR]
16 491520 497663 3.0 MiB FFFF fsg
17 524288 525311 512.0 KiB FFFF fsc
18 525312 526335 512.0 KiB FFFF ssd
19 526336 526337 1024 bytes FFFF pad2
20 526338 527361 512.0 KiB FFFF encrypt
21 557056 573439 8.0 MiB 0700 drm
22 573440 589823 8.0 MiB 0700 sns
23 589824 655359 32.0 MiB FFFF laf
24 655360 720895 32.0 MiB FFFF fota
25 720896 786431 32.0 MiB 0700 mpt
26 786432 787455 512.0 KiB FFFF dbibak
27 787456 789503 1024.0 KiB FFFF rpmbak
28 789504 791551 1024.0 KiB FFFF tzbak
29 791552 791567 8.0 KiB FFFF rct
30 819200 6488063 2.7 GiB 0700 system
31 6488064 7733247 608.0 MiB 0700 cache
32 7733248 7897087 80.0 MiB 0700 tombstones
33 7897088 7929855 16.0 MiB 0700 spare
34 7929856 8028159 48.0 MiB 0700 cust
35 8028160 30703615 10.8 GiB 0700 userdata
36 30703616 30777310 36.0 MiB 0700 grow

We will be interested by lines marked by red color here. those lines show us the partitions numbers of each file we have downloaded at the begining.

I'm talking about

1- sbl1.img

2- aboot.img

3- rpm.img

4- tz.img

5- openrecovery-twrp-2.6.3.2-g2d802

in our case the sbl1.img is located under sdb2

aboot.img under sdb5

rpm.img under sdb6

tz.img under sdb8

recovery under sdb15

now be careful and try to make it the right way.

we will use dd commands to push img files inside the right partitions.

So lets start:

if youare not logged on as root in ubuntu just open terminal and type

sudo -i

then type your password

now you must be under root access.

then type the following dd command:

dd if=[COLOR="Red"]/home/med/Desktop/[/COLOR]sbl1.img of=/dev/sdb2

i put files in the desktop, so the path to the img files for me is /home/med/Desktop/. just replace this path by the appropriate path to your files. one done you will get some information about the file size you pushed and maybe time of the operation.

keep doing the samething for the other files:

dd if=/home/med/Desktop/aboot.img of=/dev/sdb5

dd if=/home/med/Desktop/rpm.img of=/dev/sdb6

dd if=/home/med/Desktop/tz.img of=/dev/sdb8

dd if=/home/med/Desktop/openrecovery-twrp-2.6.3.2-g2d802 of=/dev/sdb15

Once you finish just reboot your phone, if you did things as described you must boot into twrp recovery.

now just use twrp to flash your ROM and follow this tutorial to reboot into your ROM

http://xdaforums.com/showthread.php?t=2451696

Good Luck.;)

If you have fixed your your phone you can consider to pay me a coffee cup :)

paypal: partager.info@gmail.com