Develop Bugs

[Q] LG G3 D855 Won't boot

Hey,
After rooting my D855 worked perfect until it the battery drained. Now, with a fully charged battery, it won't boot. It's currently stuck at the LG boot screen with the LED's cycling colours. Custom recovery isn't installed so I factory reset it using stock recovery and it still won't boot. When I connect it to my iMac, Android File Transfer recognises a device but tells me it's not available.
If anyone needs any info then please ask, hopefully someone is able to help.
Stuart

stuartb29 said:
Hey,
After rooting my D855 worked perfect until it the battery drained. Now, with a fully charged battery, it won't boot. It's currently stuck at the LG boot screen with the LED's cycling colours. Custom recovery isn't installed so I factory reset it using stock recovery and it still won't boot. When I connect it to my iMac, Android File Transfer recognises a device but tells me it's not available.
If anyone needs any info then please ask, hopefully someone is able to help.
Stuart
Click to expand...
Click to collapse
have you messed with build.prop are other system files?
anyway to restore your phone follow my steps exactly
1) pull out the battery and press and hold volume+ while connecting charger
2) release buttons when phone says download mode.
3)download your firmware via this site, replace imei of my url with your imei number (see box)
4)download this tool and navigate to your file with the "find kdz option"(do not change the other fields)
5) press normal download
6) press start chose your country and language
7) ignore the could not connect to server error
8) if that didn’t work try it over from step 5 but now with cse flash instead of normal flash
9) do not disconnect until you boot completely up for the second time
10) thank me for my post

suljo94 said:
have you messed with build.prop are other system files?
anyway to restore your phone follow my steps exactly
1) pull out the battery and press and hold volume+ while connecting charger
2) release buttons when phone says download mode.
3)download your firmware via this site, replace imei of my url with your imei number (see box)
4)download this tool and navigate to your file with the "find kdz option"(do not change the other fields)
5) press normal download
6) press start chose your country and language
7) ignore the could not connect to server error
8) if that didn’t work try it over from step 5 but now with cse flash instead of normal flash
9) do not disconnect until you boot completely up for the second time
10) thank me for my post
Click to expand...
Click to collapse
Thank you so much! Worked a charm!

Than you too! Its working!

security verification boot error... :(

i have facing this issue since when i unroot my g3 d855 then i forget to close the lg flash tool and accidently i plugged my phone to computer then it went to firmware upgrade mode then i unplugged immediately.Since then my phone stuck in security boot error and i cant go to download mode and the recovery(power+volume down) is also not working,plz help plz..

bishal_red_rvp said:
i have facing this issue since when i unroot my g3 d855 then i forget to close the lg flash tool and accidently i plugged my phone to computer then it went to firmware upgrade mode then i unplugged immediately.Since then my phone stuck in security boot error and i cant go to download mode and the recovery(power+volume down) is also not working,plz help plz..
Click to expand...
Click to collapse
http://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359

bishal_red_rvp said:
i have facing this issue since when i unroot my g3 d855 then i forget to close the lg flash tool and accidently i plugged my phone to computer then it went to firmware upgrade mode then i unplugged immediately.Since then my phone stuck in security boot error and i cant go to download mode and the recovery(power+volume down) is also not working,plz help plz..
Click to expand...
Click to collapse
FIRST install the DRIVER from this thread: http://forum.xda-developers.com/showthread.php?t=2785089
See in the part 2015 with TOT files...
(if any other drivers are present, uninstall them and do a clean install)
You need to get in Download mode to be able to fix it without having to open the phone.
1. Unplug phone from pc and power off
2. Remove back cover and remove the battery
3. Plug the micro-usb cable into the phone
4. Press and HOLD the VOLUME DOWN (make sure you press it from the edge, far from the powerbutton)
5. Put the battery - Dont let go of Volume Down yet.
6. Connect the micro-usb cable to the pc - Dont let go of volume down yet
7. Wait for the pc to recognize it, and the download mode appears on the phone, now you can let go of volume down
Repeat again, first time might not work.
Post results here...
PS, quote me because i might not see and answer then. good luck

Solution for Hard Bricked LG G4 (9008)

Hi guys,
Some people including me faced Hard brick issue with LG G4, which has now two solutions. the first is temporary, i discovered it and it involves using an SD card flashed with Original EMMC dump ( i tested it with H815 ands H811) , the second needs advanced hardware, equipment and soldering skills ( JTAG) .
The solution that i want to explore is trying to revive the phone with the SD card.
http://forum.xda-developers.com/g4/development/unbrick-lg-g4-h811-9008-qualcomm-t3456417
http://forum.xda-developers.com/g4/development/unbrick-lg-g4-h815-9008-qualcomm-t3452853
The H811 dump that i made has TWRP recovery and unlocked bootlloader, so if someone know how to help that would be awesome.
How ???, its very simple. I dont have very good UNIX architecture skills , but if the SoC successfully booted from the SD card. We could see if it detects the EMMC memory ( with parted or with LS command). I personally Tried to brow /dev/block directory from TWRP i hoped to find MMCBLK1 or something but that was unsuccessful , im pretty sure the TWRP or the Soc Does not mount it automatically .
I really dont know How , but i'm very Sure that there is a Solution headed that way , So if some one is Good with Unix architecture and can find a way to soft Flash the EMMC from TWRP ( installed in the SD card ) it would be very Nice

hi,i tried the sd card method...it boots but immediately gives me secure boot error (1006).
i have an h815 bl locked

Hello
I have LG H815 and have bricked. I have installed wrong firmware so it is brick now.
I try new tot file with QPST . but it says fail what s wrong with me?
My computer is win 10 64 bit

You can fix fastboot mode with this way.
1. First you need to download stock rom that your phone supported. extract laf.img file from rom and copy it into fastboot directory
2. download LG Flash Tool and make it ready
3. open flash tool and load firmware and dll that support your model.
open command prompt and make sure you in fastboot directory where the fastboot and related files are stored.
Run following commands.
fastboot erase recovery
fastboot erase laf
fastboot flash laf laf.img
fastboot reboot
Click to expand...
Click to collapse
Hurry up, now you need to start flash with lg flash tool, if device does not start into download mode. remove battery and insert again, press and hold Vol Up btn and plug USB cable it will boot into download mode. and your device com port should be 41, if not change it in device manager. and start LG Flash tool to load stock rom. once it finish loading rom your device will start and will show you factory test 1, 2, or 3. if it stuck there more than 3-5 minutes. reboot your phone. now you will have welcome screen.
I hope this will work with supported models.
Hit Thanks button if this work for you to help others for this useful reply.

ayuda
sylentears said:
You can fix fastboot mode with this way.
1. First you need to download stock rom that your phone supported. extract laf.img file from rom and copy it into fastboot directory
2. download LG Flash Tool and make it ready
3. open flash tool and load firmware and dll that support your model.
open command prompt and make sure you in fastboot directory where the fastboot and related files are stored.
Run following commands.
Hurry up, now you need to start flash with lg flash tool, if device does not start into download mode. remove battery and insert again, press and hold Vol Up btn and plug USB cable it will boot into download mode. and your device com port should be 41, if not change it in device manager. and start LG Flash tool to load stock rom. once it finish loading rom your device will start and will show you factory test 1, 2, or 3. if it stuck there more than 3-5 minutes. reboot your phone. now you will have welcome screen.
I hope this will work with supported models.
Hit Thanks button if this work for you to help others for this useful reply.
Click to expand...
Click to collapse
hi , am sorry for my inglish is bad
my lg h815 don't have recovery mode , no fastboot mode , no logo,
without connection to the computer when before if it was
only when press power button the phone make a 1 vibration, but nothing more
i need help¡¡ the phone woking with normality , i make downgrade to mm, bootloader unlocked unofficial, install twrp and flash firmware to android n, flash rom v30 h-rom, and magistic, after swipe for reboot birck no more display
one more thing, when press power button the phone make a vibration but no image in the display , wait a 30 seconds and again press power button and appears a imagen with 0% and a connection cable but I connect it and nothing, the screen turns off, another thing when I remove the battery with the phone connected to the PC the non-battery icon appears but when I put it back it turns off I want to think that it is not hardware
the phone worked very well until I gave it a restart, I hope it is not the plate regarts from arequipa, PERU sorry for my inglish

MichaelCV said:
hi , am sorry for my inglish is bad
my lg h815 don't have recovery mode , no fastboot mode , no logo,
without connection to the computer when before if it was
only when press power button the phone make a 1 vibration, but nothing more
i need help¡¡ the phone woking with normality , i make downgrade to mm, bootloader unlocked unofficial, install twrp and flash firmware to android n, flash rom v30 h-rom, and magistic, after swipe for reboot birck no more display
one more thing, when press power button the phone make a vibration but no image in the display , wait a 30 seconds and again press power button and appears a imagen with 0% and a connection cable but I connect it and nothing, the screen turns off, another thing when I remove the battery with the phone connected to the PC the non-battery icon appears but when I put it back it turns off I want to think that it is not hardware
the phone worked very well until I gave it a restart, I hope it is not the plate regarts from arequipa, PERU sorry for my inglish
Click to expand...
Click to collapse
lol, when you see a screen with 0% and a usb connected image, that mean your battery dead
why not just try to charge your phone? or replace a battery?

ling751am said:
lol, when you see a screen with 0% and a usb connected image, that mean your battery dead
why not just try to charge your phone? or replace a battery?
Click to expand...
Click to collapse
Hello, well after what happened I thought the same and went to buy another battery and when they tried it did not work, I repeat, not fastboot, no logo, no recovery, only a small vibration without screen, it is not detected by the PC in any of its modes as dead, the detail is that this happened after restarting when I had flashed bootloader N, rom V30, magiistic, I gave it restart and it did not turn on again, so I discard that it is hardware .
I think the problem was that I flashed the bootloader with full aboot, that gave me hardbrick I was told in a forum in Spanish I leave the link I hope you help me thanks
https://www.htcmania.com/showthread.php?t=1397519 use this method to unlock the bootloader

Hey MichaelCV
I have exactly the same problem with my LG G4 H815p. I was running [ROM][H815] H-ROM G4 NOUGAT [v29a] _ LG G4. The phone was up and running and last night I flashed the "LG-H815_29a_Modem_and_Bootloader.zip" to try resolve an issue I was having with the mobile data indicator not showing. I flashed the zip in TWRP, rebooted the phone and now it is bricked. I have exactly the same symptoms as you. Windows and FWUL does not see the phone, no matter what combination of keypressed etc that I try.
Lets hope we find a solution here for it.
Chris

[Q]E988 bricked

I have bricked lg e988 indonesia firmware rooted,updated to kitkat 4.4.2,cwm 6.4.0.4
Due to some issue I factory reset from settg menu and the phone rebooted to cwm recvry mode
I tried to rebootd to system but fail
I tried to flash stock rom via adb sideload but fail too so does with lg flash tool
So I thght smtg wth cwm then I tried to flash twrp loki 2.6 and then stuck to lg logo only until now
Pls help

You're still soft bricked, just force your device into download mode and use LG Flash Tool to return back to stock and start again.

ShadySquirrel said:
You're still soft bricked, just force your device into download mode and use LG Flash Tool to return back to stock and start again.
Click to expand...
Click to collapse
Thank you for the respond. Mind if you share me on how to force my device into download mode?
I have tried the power + volume keys combination but nothing happened, back and stop at lg logo
Before i flash the twrp, i tried the LG Flash Tool, but i wont recognize the phone, something like usb connection issue

hotmatua.parulian said:
Thank you for the respond. Mind if you share me on how to force my device into download mode?
I have tried the power + volume keys combination but nothing happened, back and stop at lg logo
Before i flash the twrp, i tried the LG Flash Tool, but i wont recognize the phone, something like usb connection issue
Click to expand...
Click to collapse
If I remember correctly (please check threads here, it's been a long time since I've used this device, so memories are fading), download mode is activated when you press Volume Up (or both of volume buttons) and insert USB cable. I know that E98x has some strange button sequences, like rebooting to recovery is a two step operation (Volume Up + Power until navbar blinks, then power button twice, that's the only way mine wanted to boot into recovery), so please check around.
As far as USB connection issues, don't use USB3+ ports and if you're on Windows 8.1+ and later, run with Administrator privileges. I never experienced that one (used LGFlashTools from inside VirtualBox running Win XP for all my needs, I'm not a Windows user), so can't really help much but forums are full with explanations how.

ShadySquirrel said:
If I remember correctly (please check threads here, it's been a long time since I've used this device, so memories are fading), download mode is activated when you press Volume Up (or both of volume buttons) and insert USB cable. I know that E98x has some strange button sequences, like rebooting to recovery is a two step operation (Volume Up + Power until navbar blinks, then power button twice, that's the only way mine wanted to boot into recovery), so please check around.
As far as USB connection issues, don't use USB3+ ports and if you're on Windows 8.1+ and later, run with Administrator privileges. I never experienced that one (used LGFlashTools from inside VirtualBox running Win XP for all my needs, I'm not a Windows user), so can't really help much but forums are full with explanations how.
Click to expand...
Click to collapse
Thank you very much...now the phone is back to initial state. This what i've done:
1. Download LG Flash tool from http://lgflashtool.com/
2. Download LG USB Drivers from http://lgflashtool.com/
3. Install LG flash tool and LG USB Drivers
4. Plug usb cable to phone
5. Hold volume buttons and then plug the usb cable to PC (i use win 10)
6. Voila, the Download Mode icon is showed up
7. Run LG Flash Tool (Administrator privilege) & follow the instruction (i use e988 v20c stock firmware)
8. Phone back to normal (only if you use the correct stock firmware)
A very big thanks to ShadySquirrel
Hopefully this thread can also be used as reference for anyone who has the same issue as i had

LG G7 bricked

Hello. I tried to install Android Pie on my LG G7 ThinQ and it failed. When turning on the phone it's showing only one thing (attachment). Tried to enter to download mode, but it's going back to this screen from attachment. Tried LG Up but it's not recognizing device. Can somebody help me? I don't want to give it back on warranty or to support.

hello, the same thing happened to me, I wanted to flash the 9.0 with lgup and when I reached 98 I launched error, my lg g7 now only enters fastboot mode and with the cmd I can execute commands like fastboot boot and fastboot devices, but lg up not recognize. Someone to help please ??

Here is picture

You can try with usb connected, press and hold volume up before restart to download mode to LGUP flash again (try with 8.0 or fresh download fw).

tripticonachos said:
Here is picture
Click to expand...
Click to collapse
My phone is in this state I read the forums about the problem, but no luck man. Only octoplus box ...

TO ADMIN -- I believe this thread is to be merged with the "LG G7 - Fastboot bootloop [SOLVED]" one - this is the same issue...

vuhothang said:
You can try with usb connected, press and hold volume up before restart to download mode to LGUP flash again (try with 8.0 or fresh download fw).
Click to expand...
Click to collapse
My LG g7 entry only in fastboot mode, not download mode.
---------- Post added at 04:16 PM ---------- Previous post was at 04:14 PM ----------
you can try this link, I try but I did not upload the image in the cmd, translate the page and see it.
https://www.htcmania.com/showthread.php?p=30722058&styleid=58

tripticonachos said:
My LG g7 entry only in fastboot mode, not download mode.
---------- Post added at 04:16 PM ---------- Previous post was at 04:14 PM ----------
you can try this link, I try but I did not upload the image in the cmd, translate the page and see it.
https://www.htcmania.com/showthread.php?p=30722058&styleid=58
Click to expand...
Click to collapse
Same with me when cross-flash from HK region to EU region, always to flashboot or recovery mode.
With usb cable connected with PC (your G7 always in fastboot mode) force restart by press and hold volume down + power until screen turn off, release two button and fast press and hold volume up before LG 7 logo. My G7 boot into download mode.

vuhothang said:
Same with me when cross-flash from HK region to EU region, always to flashboot or recovery mode.
With usb cable connected with PC (your G7 always in fastboot mode) force restart by press and hold volume down + power until screen turn off, release two button and fast press and hold volume up before LG 7 logo. My G7 boot into download mode.
Click to expand...
Click to collapse
hi, the same thing keeps happening to me, the screen goes down in dowload mode for 1 second and immediately goes to fasboot mode

tripticonachos said:
hi, the same thing keeps happening to me, the screen goes down in dowload mode for 1 second and immediately goes to fasboot mode
Click to expand...
Click to collapse
hi
- While holding Volume Up key connect your phone to PC using USB Cable (Don’t leave volume key while connecting)
- Release the Volume UP key as soon as the phone goes into Download Mode.

vuhothang said:
hi
- While holding Volume Up key connect your phone to PC using USB Cable (Don’t leave volume key while connecting)
- Release the Volume UP key as soon as the phone goes into Download Mode.
Click to expand...
Click to collapse
does not work as I said, when connected to the PC with the volume + pressed appears for a second the screen of the download mode and immediately goes to fastboot mode, so I can not do anything with lg up

Makes me nervous to do manual update on my Verizon version now...

ive got this exact same issue.. triedevery way imagined.. no joy.. waiting to hear from my serves provider.. lg cant gelp with a unlock. bin file.. they refered me to my SP.. ? SO ANNOYING..!!

@vuhothang, @tripticonachos, @DenisVelev, @Lith02, @Social_Psycho84, @Prosjak, @Wilmer25
Guys, I called you in one message as it seems we all had experienced the same drastic issue with the phone got bricked on the update process. We all probably used LGUP and on the update somewhere on the %'age progress (in mine it was 91%) the process stopped so we needed to force reboot and after that we got only fastboot menu.
Once trying to enter download mode, upon connecting to USB, the download mode title frame blinks for a split/second and it goes all way into fastboot only, correct?
Having said that - I believe it is vital not only to update how you resolved (or still resolving) the issue but how it happened we stepped in that deep sh!t overall...
On my particular case - I had bought the phone with branded oreo software, what I wanted was to (a) force-upgrade to Pie (as the brand operator is still very late with the Pie update) and (b) unbrand to open or brand Orange as I wanted the VoLTE and VoWiFi working. I used the LGUP 1.14 and tried uppercut but it did not work in my case (probably because of antivirus software something was permanently blocking) so I found the common_dll file which resolved the issue and the progress started. However, as mentioned - at 91% it stopped and phone died. I moved it to LGE service, they replaced the mainboard as it is under warranty. I suspect I used some sort of invalid DLL file, probably that caused the process crashed.
As a postmortem - I regret that in panic I force-rebooted the phone, it was certain the system won't start and now I realize it was also a high risk it will be bricked but you know... just tried to resolve instantly. I wonder what would happen if I would not reboot but leave the phone in download mode (still hold on 91% but still alive) and in that state would connect the phone back into LG Bridge software or LGEtool - possibly it would be recognized by the firmware auto-flasher inspected or fixed and it would reboot itself properly into download to resurrect...who knows.
I am looking forward your status guys - where are you with the fix and actually how did you go into that trouble - so what flash method you used ? You know, to avoid that scenario in future...

ultragliss said:
@vuhothang, @tripticonachos, @DenisVelev, @Lith02, @Social_Psycho84, @Prosjak, @Wilmer25
Guys, I called you in one message as it seems we all had experienced the same drastic issue with the phone got bricked on the update process. We all probably used LGUP and on the update somewhere on the %'age progress (in mine it was 91%) the process stopped so we needed to force reboot and after that we got only fastboot menu.
Once trying to enter download mode, upon connecting to USB, the download mode title frame blinks for a split/second and it goes all way into fastboot only, correct?
Having said that - I believe it is vital not only to update how you resolved (or still resolving) the issue but how it happened we stepped in that deep sh!t overall...
On my particular case - I had bought the phone with branded oreo software, what I wanted was to (a) force-upgrade to Pie (as the brand operator is still very late with the Pie update) and (b) unbrand to open or brand Orange as I wanted the VoLTE and VoWiFi working. I used the LGUP 1.14 and tried uppercut but it did not work in my case (probably because of antivirus software something was permanently blocking) so I found the common_dll file which resolved the issue and the progress started. However, as mentioned - at 91% it stopped and phone died. I moved it to LGE service, they replaced the mainboard as it is under warranty. I suspect I used some sort of invalid DLL file, probably that caused the process crashed.
As a postmortem - I regret that in panic I force-rebooted the phone, it was certain the system won't start and now I realize it was also a high risk it will be bricked but you know... just tried to resolve instantly. I wonder what would happen if I would not reboot but leave the phone in download mode (still hold on 91% but still alive) and in that state would connect the phone back into LG Bridge software or LGEtool - possibly it would be recognized by the firmware auto-flasher inspected or fixed and it would reboot itself properly into download to resurrect...who knows.
I am looking forward your status guys - where are you with the fix and actually how did you go into that trouble - so what flash method you used ? You know, to avoid that scenario in future...
Click to expand...
Click to collapse
I investigated the problem of why it stopped at 98% and it is because of the issue of the ddl file, before any flash by lg up it is better to prevent and replace the common ddl file, which I did not do. just in case, I still have the phone in fastboot mode, I have not been able to find a solution yet.

So.. Ive actually managed to get outta fastboot and into quallcom9008 mode.. (Deliberately..) But.. Cant do **** ib that mode just yet.. Software not available.
Now i read about resetting while in thar mode via test points. Will let ya know if there comes anything from that..
(Btw... To get into 9008 mode.. Hold power and vol down while in that gawd aweful fastboot tutorial menu.. And tap the vol up button fast and repeatedly.. If it resets and you have a blank screen.. Ya there..!! If it just resets to.. Well. Fastboot.. Ya didnt rap fast enough.. Do it again.
To exit 9008 mode.. Just hold power and vol down till bootlogo comes up..
It aint much. But maybe some1 more clever can use that info and get us outta that gawd damn menu.. plz..

If you are stuck in fastboot loop see this post:
https://forum.xda-developers.com/showpost.php?p=79779837&postcount=13

I hope you fixed your issue but if anyone needs it here: go into edl mode and flash laf_a and laf_b. these are download mode files. I will attach these files later today