yashsingh1/xdaforums huggingface dataset:
[G2 General] burningcreation:
I must have done the same thing because now my G2 is pretty much dead. It just stays on a black screen and is flashing on and off. :(

I can't get into recovery and I don't see an LG logo or anything. I really am getting desperate now.

Can someone please help me?
[G2 General] samuelv___:
Have you tried the steps in the op, my lg g2 is doing exactly what yours is I haven't been able to succeed in fixing it but I'm getting help in this thread last two or three pages is about this.

http://xdaforums.com/showthread.php?p=53388184
[G2 General] burningcreation:
Okay, I read your replies in that thread and I am in the EXACT same situation as you now. I managed to follow the steps at the start of this thread though and I pushed the img files to the device but it still didn't work. I tried to do it again but when I type ls /dev/sd* I don't get the big number sdb like I did yesterday.

If you find a way to make any progress with this, please reply here and I will do the same.

Thanks.
[G2 General] ivanjeju:
LG G2 no usb debugging

Hi everyone! I have a problem. Phone is switched on and there is LG logo and restarts. Phone does not go into Recovery and Download mode, also no determined by the computer. Tried through ubuntu did not help. Please tell me how to turn it on. thank you:confused:
[G2 General] SeoSol:
TWRP Screen Problem

Now that I've accomplish all of these steps, the problem is that when the phone gets into TWRP the bottom half of the screen is not mapped properly and will not function correctly as I want it. Also ADB access is not detected by my computer.
[G2 General] aqualuv74:
Almost there!!!

Silly me!! left out the first forward slash in front of home!!
[G2 General] aqualuv74:
FIXED

And I'm all good now!! THANK YOU VERY MUCH!!!!!!!!!!!!
[G2 General] ramin salari:
Good tnx
[G2 General] ivanjeju:
LG G2 no usb connction

I have all these problems except 5

When you turn on the LG logo appears for 5 seconds and restarts

LG has no USB connection to a computer

On Linux only shows up on sdb1-sdb5

thank you
[G2 General] SwAY256:
I tried to install Paranoid Android from CM11 M7 (and TWRP 2.7). I guess I did somthing wrong because after reboot I have this problem. Gonna test this fix in a few hours and let you know if it works.

Thanks for this topic :)
[G2 General] burningcreation:
I followed this guide exactly and it seemed to have sort of worked. But now when I boot I am in fastboot mode. My device is now being recognised in device manager though and the drivers are installed properly.

What can I now do to get out of fastboot?
[G2 General] subtleaggression:
lost

First off id like to thank everyone who has helped out getting our phones unbricked. and to those whose phone has been repaired congrats!

i have had my G2 for two weeks. when i got it i tried to put some kind of recovery on it ( TWRP ) and root it. i tried almost everything i could find. as it turns out out it didnt work and would just display "secure boot error: boot verification certify. cause boot certification" it the upper left corner of the LG screen. after some reading i learned it wasnt possible yet to put a recovery on my phone but it still worked. so i left it at that for now. untill this morning. it had an update. i figured it might fix itself so i hit "OK" and now it flashes LG and the error in the corner or the screen then shuts off. i tried ubuntu with no luck as it didnt see the phone. then i tried VMware and Knoppix. it however reconized the phone but didnt show any of the files the tutorial said it should. this is where im stuck. i have dealt with samsung phones in the past, but older ones and never encountered an issue like this. i have read and read and tried so many things with no success. is there something im missing? some help would be much appreciated. i would even make a donation or buy someone a beer (or 4 lol) for a successful fix on this issue.

Thanks

btw its an AT&T LG-D800 about a month old
[G2 General] bender_007:
Just pm m8
[G2 General] subtleaggression:
just wanted to say thanks to Bender. this guy is awesome. i didnt think that clicking that Thanks button was enough. my phone works again and im updating all my files again. :D
[G2 General] Israfil22:
no such file gdisk -l /dev/sdb
[G2 General] bender_007:
sdb is not in general.

First find out which one is your device, then follow the partition layout of the device.

ls /dev/sd* to see..

then gdisk -l /dev/sdb (b= a,b,c,d,...)

It should throw out partition layout

if you're sure it's your device ( proper /dev/sd*) then

press button up (arrow key on keyboard, to postpone the last command) and press enter, and again and again...

you will see that the errors which are jumping over the screen(if any..) are stopped.. And finally your phone screen doesn't flash (doesn't go gray-blac-gray-black).
[G2 General] ccguntam:
hi guy i got same problem screen on only show Logo then boot to black screen and light still on now do i fix this pls.... tell me how to fix pls.....

---------- Post added at 08:42 PM ---------- Previous post was at 08:38 PM ----------

Hi guy i have same problem........in isai LG2LL (japan) how to fix pls show me if you know the way to do so sad now
[G2 General] mahdibassam:
LG G2 Bricked

Hi everyone,

My LG G2 (D802T) is suffering from the same problem, It does not turn on, and when i press the power button to turn it on it shows the lg logo and the secure booting error message, and then the screen goes black, and the backlight keeps blinking like you can see in the video below:

https://www.youtube.com/watch?v=9sv8VGOFn9s&feature=youtu.be

And from there, I follow the guide in the OP post.

When I put in ls /dev/sd* , I get dev/sda , dev/sda2, dev/sda3, dev/sda4, dev/sda5. I have attached a screenshot of the Terminal Screen :

Im using Parallels desktop for Mac to boot linux as a virtual machine.

Can someone tell me whats wrong?
[G2 General] dotjsx:
Stuck At Logo

My AT&T G2 Has Been Rooted For A Month. I Started Getting OTA Notifcations And Ignoring Them. When My Phone Rebooted Today I Had The Same Issue Everyone Is Having. My Issue Is That I Was Successful In Pushing All Of The Files, Except TWRP. I Thought To Myself, If The Link Posted Is For An 802 Model, I Should Get TWRP For The 800. On Top Of That, I Renamed It To Recovery.img Everything Pushed Successfully, But Then My Phone Rebooted To The LG Logo. Not With Any Errors, Just Frozen At The Splash Image. Cannot Enter Recovery, Or Download Mode, Now Linux And Windows Are Not Able To Recognize It Through Terminal, ADB, Or My Devices. I Never Installed A Custom Recovery When I Rooted My Phone, So I Can't Try The Fix Where People Can Fix It Through TWRP.

Please Help?
[G2 General] Triad79:
[MENTION=1629409]dotjsx[/MENTION] try this bender's proposal above, and if it doesn't recognize the phone you need to pull out the battery i for half an hour and after try again with recognize procedure. If Ubuntu live can't recognize the phone again then install Knopix DVD installer from HERE and try to recognize it again.

After it does take the procedure from the first page with laf.img, aboot.img and other files for LG G2.

Don't know if you can make use of this program: adb_pusher(for windows) where you can try to put rom.zip into root. It doesn't install it.
[G2 General] siggey:
If I will be in you I will try to make an hardware damage (like high voltage in usb) and send the phone to warranty repair. Broken is broken....

Sent from an LS-980 GSM unlocked
[G2 General] dotjsx:
I Already Tried That Before Posting. However I Should Add That Linux Isnt Installed, Its Running From A USB Drive, If That Makes A Difference. Also, The G2 Doesnt Have A Removable Battery, So I'm Going To Have To Look Up The Instructions For Opening It. If I Do That, Will It Break Some Seal That Will Void The Warranty, Because The Phones So New I Could Just Get A New One From AT&T For Free, But Then I'd Lose My Files.
[G2 General] bender_007:
Does it mention fastboot anywhere ?

So you don't have a custom recovery ?
[G2 General] dotjsx:
I Did The Battery Pull, It Wasnt Recognized By Windows Or Linux Like It Was Before The Mix Up. In The Process Of Downloading KNOPPIX And I'll Post How That Goes.

---------- Post added at 10:11 PM ---------- Previous post was at 10:02 PM ----------

No Fastboot. Literally Nothing But An LG Logo. It Comes On And STAYS On If You Press Power, Power + Up, Power + Down, Or Plug It Into USB. The Only Way To Get It To Turn Off Is By Holding The Power For About 15 Seconds, It Will Turn Off, Have To Continue To Hold It, Logo Flashes Back On For About 3 Seconds, And Then Turns Off. Then You Remove Your Finger From The Button. Those Are My Only 2 Phone States. Off, Or LG Logo.

And No, There Is No Custom Recovery.
[G2 General] Triad79:
Have you tried to see in what state windows recognizes G2, if in any when it's LG logo only???

I had a condition once on my LG Flex D958 which is basically the same platform phone.

It happened on continuous boot loop and LG logo flashing, the phone has embedded battery and you need some trying before you turn it off.

The mode when connected to windows flash appears after turning on the phone and it immediately starting some 15 partitions and goes into qhsusb_bulk mode. Thread is located here:

http://xdaforums.com/showthread.php?t=2644083&page=10
http://xdaforums.com/showthread.php?t=2644083&page=11

Also: Quoting [MENTION=2048968]PattyNYC[/MENTION]

It is a little tricky to get the timing right. Beyond that I'm am completely out of ideas other then sending it back to LG to be rapaired.

1 Turn the power off.

2 Press and hold the POWER/LOCK Key + VOLUME Down Key on the back of the

phone.

3 Release the POWER/LOCK Key + VOLUME Down Key when the LG logo is

displayed, then press and hold the VOLUME Down Key + VOLUME Up Key again.

4 Release all keys when the Factory hard reset screen is displayed.

5 Select Yes using VOLUME UP/Down Key and press the POWER/LOCK Key to

continue or select No using VOLUME Up/Down Key and press the POWER/LOCK

Key to cancel.

6 Select Yes using VOLUME Up/Down Key and press the POWER/LOCK Key

once more to confirm or select No using VOLUME Up/Down Key and press the

POWER/LOCK Key to cancel.

Try these and report back, especially which mode windows recognizes the phone in???
[G2 General] KingDan:
I've done the same mistake only with sbl1.img file.

Is there any solution to fix this?

My phone is totally dead too :crying:
[G2 General] dotjsx:
GG

Last Night I Followed The Battery Removal Guide, Let It Discharge Energy For 2 Hours (Overkill) And Tried Again. Before I Tried The Linux Fix Windows Saw It As Bulk With Multiple Partitions, But I Can't Get It To Do It Again, Even After Pulling The Battery. Also, The Button Pressing Was Literally The First Thing I Tried When I Messed Up My Phone 3 Days Ago. I Know The Timing Because I've Done It Before When My Phone Was Working. Doesnt Do Anything Now.

To Sum This Up. I've Tried Every Fix That Everyone Has Thrown At Me, And I'm Calling It. I Have A Brick. I'm Going To Seal This Thing Back Up Nicely, And Stop By The AT&T Store. Thanks For Everyone That Helped Me Out. Maybe The G2 Might Be The First Android I Dont Root. Because LG Made This Thing 10 Sorts Of Difficult To Even Get A Custom Recovery On.

-JSX
[G2 General] Triad79:
First how is it QHSUSB_HUSK and not QHSUSB_BULK?
[MENTION=243460]captain[/MENTION], as I see here on K. Live cd you sucessfully managed to mount your G2 to Linux where it DOES recognize partitions.

Just to mention that mine wasn't. It was Ubuntu with Vmware virtual partition. Anyone having this problem would need to use clean Linux instalation or at least some Live boot CD as Knopix is, because it's booting directly from Bios, not to mention it's a DEBIAN!

As far as 'dd'-ing is concerned Captain, in your place I'd push just aboot.img: rpm.img, tz.img and recovery.img at the moment, just to see if I would get the phone into any mode at all except freaking QHSUSB?

That's because that boot.img and laf.img are maybe present and you would just overwrite them needlesly.

I would go see if these 4 files are doing the job and after it I'd just push only laf.img (not boot.img) since all infos of download mode exiting from Qhsusb are already in aboot.img file..! After which you can flash kdz file or which one you need.

Yes, almost forget... All the commands you entered are ok and CAN go into their respected partitions including this one.

dd if=/home/knoppix/Desktop/openrecovery-twrp-2.7.1.0-g2d800.img of=/dev/sdc15

or openrecovery-twrp-2.7.1.0-g2d800.img DOES have *.img extension like here

http://techerrata.com/browse/twrp2/hammerhead

But first, try

aboot.img

rpm.img

tz.img

recovery.img and reset the phone after which you could try Team Win recovery partition if it doesn't go into other then freaking QHSUSB_BULK...

Good luck.
[G2 General] bender_007:
Just dd aboot, boot, laf and stock rec. Then flash kdz..
[G2 General] 05UFCaptain:
Am I still salvageable?

First and foremost, thanks for the quick responses. Second, my apologies for stating the device manager recognized my phone as QHSUSB_HUSK (Don't ask where that came from. It was quite late for me, and I was clearly not all there, lol). Triad, you are correct. Device Manager recognized the phone as QHSUSB_BULK, and I tried to correct it this morning, but the xda forum was not letting me back into the my original post.

So, after dd'ing the following

dd if=/home/knoppix/Desktop/aboot.img of=/dev/sdc5

dd if=/home/knoppix/Desktop/rpm.img of=/dev/sdc6

dd if=/home/knoppix/Desktop/tz.img of=/dev/sdc8

dd if=/home/knoppix/Desktop/recovery.img of=/dev/sdc15

dd if=/home/knoppix/Desktop/sbl1.img of=/dev/sdc2

and receiving the following from terminal,

knoppix@Microknoppix:~$ dd if=/home/knoppix/Desktop/aboot.img of=/dev/sdc5
2048+0 records in
2048+0 records out
1048576 bytes (1.0 MB) copied, 0.370093 s, 2.8 MB/s
knoppix@Microknoppix:~$
knoppix@Microknoppix:~$ dd if=/home/knoppix/Desktop/rpm.img of=/dev/sdc6
1024+0 records in
1024+0 records out
524288 bytes (524 kB) copied, 0.197356 s, 2.7 MB/s
knoppix@Microknoppix:~$
knoppix@Microknoppix:~$ dd if=/home/knoppix/Desktop/tz.img of=/dev/sdc8
1024+0 records in
1024+0 records out
524288 bytes (524 kB) copied, 0.197779 s, 2.7 MB/s
knoppix@Microknoppix:~$
knoppix@Microknoppix:~$ dd if=/home/knoppix/Desktop/recovery.img of=/dev/sdc15
23552+0 records in
23552+0 records out
12058624 bytes (12 MB) copied, 4.59313 s, 2.6 MB/s
knoppix@Microknoppix:~$ dd if=/home/knoppix/Desktop/sbl1.img of=/dev/sdc2
1024+0 records in
1024+0 records out
524288 bytes (524 kB) copied, 0.202464 s, 2.6 MB/s
knoppix@Microknoppix:~$

where recovery.img is what I believe to be a stock ATT recovery.img file from that androidforums.com thread I mentioned previously, the phone no longer boots to the "error: boot certification verify". Now, it standard reboots and stays frozen on the LG screen, or it can be booted to "download mode" if the volume up key is help during reboot. So, I thought I was going to he home free with Hyelton's thread for returning to stock firmware. However, the phone is not recognized at all in windows 7 now. Additionally, terminal in knoppix can still see the partitions, but it returns the following when attempting to access /sdc

knoppix@Microknoppix:~$ gdisk -l /dev/sdc
GPT fdisk (gdisk) version 0.8.5

Problem opening /dev/sdc for reading! Error is 6.
knoppix@Microknoppix:~$ dd if=/home/knoppix/Desktop/sbl1.img of=/dev/sdc2
dd: opening `/dev/sdc2': No such device or address

Finally, not sure if it matters, but I have attempted to boot into recovery to see what would happen, and the phone, with no further prompting on my part, immediately started to attempt a recovery, but hit an error before leaving 0%. Thanks again for any help or instruction you can provide!

-Nick
[G2 General] bender_007:
So what's the state of the phone now ?

Windows recognizes it ? Ubuntu ? throws bunch of partition mounting errors ?

^ 1st --- "sudo -i"
[G2 General] 05UFCaptain:
No, windows does not recognize the phone at all anymore. Haven't tried Ubuntu, but Knoppix returns that same code I posted above, even as a root user.

knoppix@Microknoppix:~$ sudo -i
root@Microknoppix:~# gdisk -l /dev/sdc
GPT fdisk (gdisk) version 0.8.5

Problem opening /dev/sdc for reading! Error is 6.
root@Microknoppix:~#

Again, don't know about Ubuntu, but Knoppix is not throwing any partition mounting errors at me...
[G2 General] bender_007:
try ls /dev/sd*

so, no download mode ? No recovery ?
[G2 General] Darksoun:
Thanks for this post :)

Enviado desde mi LG-D802 mediante Tapatalk
[G2 General] sabooakhte:
Accidentally Flashed Original Recovery

Hi Everyone,

Urgent Help Required!!! I flashed to original recovery.img instead of TWRP/CWM using the dd method outlined by the OP, now my LG G2 VS980 just keeps running in a boot loop. All I can get is the hard reset screen, nothing else, at this point I would love to get back to the boot certify error and try from scratch. Can someone help??? Thanks,

Sincerely

S
[G2 General] bender_007:
Can you enter download mode?
[G2 General] sabooakhte:
Accidentally Flashed Original Recovery

Nope, can't enter download mode, and getting into recovery only presents me the option to hard reset my device, which doesn't work because there is no rom in the phone
[G2 General] sabooakhte:
Accidentally Flashed Original Recovery

I'm sure I'm not the only one who has this problem? Thanks,

Sincerely,

-S
[G2 General] bender_007:
Download mode -> flash kdz
[G2 General] sabooakhte:
Accidentally used Original Recovery

I don't have download mode! Pushing the volume up and plugging in the USB takes me to boot loop not fastboot or download.
[G2 General] bender_007:
And the device isn't recognized in device manager under windows ?
[G2 General] Triad79:
[MENTION=243460]captain[/MENTION] what's the situation now? It seems that [MENTION=5877085]sabooakhte[/MENTION] and captain have the same situation?

I'd involve [MENTION=2830752]Playful[/MENTION]lgod and [MENTION=2684188]autoprime[/MENTION] here because this problem is reported on a wide scale on G2 and Flex phones!!!
[G2 General] sabooakhte:
Accidentally Flashed Original Recovery

Nope, windows doesn't recognize it, not even the qhsbulk. It just keeps booting and no matter what I try, it doesn't recognize; is there a hardware means to corrupt recovery to get back to the boot certify error? I'm trying to look it up. Might just invest some money in getting a new motherboard.

I'm not the only one who had this problem; I think [MENTION=5755349]seangannon1996[/MENTION] also had this problem but I think he sold his phone. Thanks,

-S
[G2 General] mahdibassam:
Hi everyone,

My LG G2 (D802T) is suffering from the same problem, It does not turn on, and when i press the power button to turn it on it shows the lg logo and the secure booting error message, and then the screen goes black, and the backlight keeps blinking like you can see in the video below:

https://www.youtube.com/watch?v=9sv8...ature=youtu.be

And from there, I follow the guide in the OP post.

When I put in ls /dev/sd* , I get dev/sda , dev/sda2, dev/sda3, dev/sda4, dev/sda5. I have attached a screenshot of the Terminal Screen :

Im using Parallels desktop for Mac to boot linux as a virtual machine.

Can someone tell me whats wrong?
[G2 General] sabooakhte:
You're fine

The backlight keeps blinking? I haven't seen that before, but if you're getting the "boot certify error" you're fine. Close the phone completely; hold down the power button for a complete boot screen cycle and a little more until it goes completely off. Then hold "vol down" and "power" buttons with the phone connected to the computer to get it recognized by your USB port. Once you hear the familiar USB sound, when you connect a drive or anything like that, then you can run the ls /dev/sd* command and see all the partitions. If not, then find a windows machine and try connecting it up and you should get a lot of drives and qhsbulk or at least an unknown driver in the device manager. Sorry, not too knowledgeable on macs :( but overall you should recover from it.

-S
[G2 General] yl8754915:
Question

I was following by the post, and then successfully change the file by using Ubuntu. However, I can't boot into recovery. Then, I plunged into PC. As a result, my PC can't detect the phone as a removable driver. Neither can Ubuntu detect. My cell phone just stuck on the "logo" screen.(like the computer is another AC provider). If there is nothing I can do, the last thing I want to do is give it to the Repair Provider...:eek:

PS: my phone has lower power...before it can be use-----it just left 40% battery power.
[G2 General] Eijo:
I might be in the same case after the flash of my G2 failed. Made a thread here, waiting for answers.

Is there any chance the solution provided by this thread works ?

Edit : Somehow I did manage to hard reset and then access recovery mode, so I did restore my backup and my G2 is back to life. Weirdest thing ever.
[G2 General] Portauxbastard:
Wish I had seen this before!

This happened to me and I took my phone to the repair store and 100 bucks later it was fixed. Wonder if they used this thread to do it.
[G2 General] sidis123:
LG G2 fastboot mode

Hello I have a LG G2 my device hangs after trying to install ROM and managed to reach the state Dooland Mod Rom I'm trying to get stock, but I try to download it stops at 49% of this guide can help me?
[G2 General] dannyboyisdead:
Problem with G2 detection in linux

When i look for my G2 in the listing, i cant find it. All i have in the option are...

/dev/sda /dev/sda1 /dev/sda2 /dev/sda5 /dev/sdb /dev/sbd1

None of these are the G2

furthermore the back light keeps blinking

I'm on a virtual machine (virtual Box) on windows
[G2 General] prajwalcshetty@gmail.com:
Lg g2 secuere boot error

t@it:~$ sudo -s

root@it:~# ls /dev/sd*

/dev/sda /dev/sdb /dev/sdc14 /dev/sdc21 /dev/sdc29 /dev/sdc36

/dev/sda1 /dev/sdb1 /dev/sdc15 /dev/sdc22 /dev/sdc3 /dev/sdc4

/dev/sda2 /dev/sdc /dev/sdc16 /dev/sdc23 /dev/sdc30 /dev/sdc5

/dev/sda3 /dev/sdc1 /dev/sdc17 /dev/sdc24 /dev/sdc31 /dev/sdc6

/dev/sda4 /dev/sdc10 /dev/sdc18 /dev/sdc25 /dev/sdc32 /dev/sdc7

/dev/sda5 /dev/sdc11 /dev/sdc19 /dev/sdc26 /dev/sdc33 /dev/sdc8

/dev/sda6 /dev/sdc12 /dev/sdc2 /dev/sdc27 /dev/sdc34 /dev/sdc9

/dev/sda7 /dev/sdc13 /dev/sdc20 /dev/sdc28 /dev/sdc35

root@it:~# gdisk -l /dev/sdb

GPT fdisk (gdisk) version 0.8.8

Partition table scan:

MBR: MBR only

BSD: not present

APM: not present

GPT: not present

***************************************************************

Found invalid GPT and valid MBR; converting MBR to GPT format

in memory.

***************************************************************

Warning! Secondary partition table overlaps the last partition by

33 blocks!

You will need to delete this partition or resize it in another utility.

Disk /dev/sdb: 30464640 sectors, 14.5 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): A6C4B683-10F9-4A4C-AEBD-8A05D8B6D189

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 30464606

Partitions will be aligned on 2048-sector boundaries

Total free space is 2014 sectors (1007.0 KiB)

Number Start (sector) End (sector) Size Code Name

1 2048 30464639 14.5 GiB 0700 Microsoft basic data
[G2 General] bender_007:
gdisk -l /dev/sd

c
[G2 General] p4rkourist:
question

Can you just use the recovery file included in that link to restore it to stock? or no
[G2 General] sabooakhte:
NOOOO!

NOOOO!! that's what I did and it put me in a perpetual bootloop without getting access to rewrite partitions! Stick to flashing TWRP!
[G2 General] cyf1079998343:
i have followed your tutorial and it seems my g2 is getting worse, there is no reflection when i plug my g2 to computer whatever under ubuntu and windows. and i use the command "ls /dev/sd*" there is not external device shown there. i still can not boot into recovery, and my phone stuck in the LG logo