Develop Bugs

successfully flash a kdz but still having Boot loop issue

Hi all
I have done my best to search all the possible solution on xda as well as google, and I don't think I found the answer.
Basically, my phone (for some unknown reason) now suddenly have the boot loop issue.
I first tried to use the LG PC suite, but it is never able to find the phone when it is connected in download mode.
I then tried to use the LG Flash Tool v.1.18 to flash a stock rom in download mode, but failed, due to the following error (of course USB driver is installed, and COM41 changed)
Code:
PID: Null
IMEI: Null
Model :
DLL: D855
BIN: LGD855AT-00-V10g-222-99-JUL-14-2014-16G+0.TOT
SWV:
SWOV:
Model Information Check Fail
000000000
Finally I use LG Flash Tool 2014 to flash a stock KDZ image, using CS_emerengcy and CES flash, the KDZ image is obtained from the LG dev using my own IMEI. This method actually works, but after it reboots, and goes into the Android Setup wizard, it restarts itself and stuck in boot loop again!
So what may I do please? I am very stuck and have no clue.

luckyvictor said:
Hi all
So what may I do please? I am very stuck and have no clue.
Click to expand...
Click to collapse
Did u try booting into recovery and doing a factory data reset after flashng?

[Unbrick] How to revive H815 - no recovery/fastboot/download mode

Today something went wrong while flashing weekly LOS build and my LG G4 (H815 with v20P firmware) went into very fast bootloop: https://www.youtube.com/watch?v=9gm0dh6bLp4
In this state i wasn't able to enter recovery, nor fastboot, nor download mode. Only IMEI screen (Vol Up + Vol Down I believe) was accessible which was no use.
Here are the steps which got me out of troubles:
A) Verify that you have LGUP installed and have proper 8994.dll version for your device.
Different versions of FW use different libraries which results in errors during flashing.
Steps:
1) Install LGUP with this guide https://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
2) Get the right DLL. You can try this one:
Abandoned War Place said:
FIX REFUBRISH/DOWNGRADE ETC STUCK AT 16% DOWNLOAD MODE UNABLE TO GET BACK TO STOCK
error 0x2000 invalid command response Has Been FixeD WITH THE LASTEST DLL FILE
FILE INCLUDE (DLL+PATCH_DLL+SETUP LGUP+DRIVER) package
Please Read The *READ ME FILE FOR THE RIGHT INSTALLATION WITHOUT GETTING ANY PROBLEM :
Link Easy To Download No Ads Bulllsh*t.................. :
https://drive.google.com/file/d/0B_yWw6RLoA-gdTMtZFczMUhQOHM/view?usp=sharing
Click to expand...
Click to collapse
...or extract it directly from KDZ file with extractor https://forum.xda-developers.com/showthread.php?t=2600575.
You need to extract it from FW version that your phone is already running, not from the one you are about to flash! (when flashing from v20d to v20p you need v20d version, but when reflashing v20p FW you need the v20p DLL)
3) Navigate to LGUP install folder (default "C:\Program Files (x86)\LG Electronics\LGUP")
4) Overwrite the old DLL located in "model\8994" folder version with new one in
I don't know the exact compatibility, or how many different DLL versions are out there. Hopefully it doesn't brick the device even more when wrong version is used, it just doesn't work.
B) Write h815 image to sdcard as mentioned here:
leptdre said:
Hi guys,
i came up with a temporary to unbrick LG G4 H815 , you just need a 32 GB SD card ( i used Sandisk 10 class) , the dump that i will link , and Win32 disk Imager, the SD card must low level formatted.
1- download this dump
http://www.4shared.com/rar/NzSqsBzib...230737_00.html
2- put the SD card in the PC and chose the dump file and write ( run as admin ):
Click to expand...
Click to collapse
It worked for me with just 8GB one. Be aware that the image written to SD have like 20 partitions so windows might go crazy.
C) Follow these steps:
jam1445 said:
3. One the Write Completes. Eject Card and insert in your LG G4 H811. Press Volume Up Button while connecting the USB Cable.
4. There you go, it will open the download mode.
Click to expand...
Click to collapse
D) At this moment my G4 finally entered Download mode
I was able to reflash KDZ using the usual procedure (select UPGRADE, find a KDZ file, restart LGUP, select REFURBRISH and START). Initially I got 0x2000 error at approximately 16% (boot displayed as status) that was caused by old version of 8994.dll library.
E) Back to stock
Now you should have stock H815 again so lets flash LOS back as usual
Kudos to OPs: @bullghost , @shakeyabooti , @leptdre , @jam1445 and other posters on G4 section of XDA!
Hope this helps someone!

Good job. If your using this and you're gonna buy a SDCard on purpose, be aware that this fix might not work on your device. Ehehe

@Jirrick im getting the same error on LGUP where do i find a newer version of the dll?

inso420 said:
@Jirrick im getting the same error on LGUP where do i find a newer version of the dll?
Click to expand...
Click to collapse
are these what you looking for.?
https://forum.xda-developers.com/showpost.php?p=73586554&postcount=921

VS986 Stuck on Download Mode
Jirrick said:
Today something went wrong while flashing weekly LOS build and my LG G4 (H815 with v20P firmware) went into very fast bootloop: https://www.youtube.com/watch?v=9gm0dh6bLp4
In this state i wasn't able to enter recovery, nor fastboot, nor download mode. Only IMEI screen (Vol Up + Vol Down I believe) was accessible which was no use.
Here are the steps which got me out of troubles:
A) Verify that you have LGUP installed and have proper 8994.dll version for your device.
Different versions of FW use different libraries which results in errors during flashing.
Steps:
1) Install LGUP with this guide https://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
2) Get the right DLL. You can try this one:
...or extract it directly from KDZ file with extractor https://forum.xda-developers.com/showthread.php?t=2600575.
You need to extract it from FW version that your phone is already running, not from the one you are about to flash! (when flashing from v20d to v20p you need v20d version, but when reflashing v20p FW you need the v20p DLL)
3) Navigate to LGUP install folder (default "C:\Program Files (x86)\LG Electronics\LGUP")
4) Overwrite the old DLL located in "model\8994" folder version with new one in
I don't know the exact compatibility, or how many different DLL versions are out there. Hopefully it doesn't brick the device even more when wrong version is used, it just doesn't work.
B) Write h815 image to sdcard as mentioned here:
It worked for me with just 8GB one. Be aware that the image written to SD have like 20 partitions so windows might go crazy.
C) Follow these steps:
D) At this moment my G4 finally entered Download mode
I was able to reflash KDZ using the usual procedure (select UPGRADE, find a KDZ file, restart LGUP, select REFURBRISH and START). Initially I got 0x2000 error at approximately 16% (boot displayed as status) that was caused by old version of 8994.dll library.
E) Back to stock
Now you should have stock H815 again so lets flash LOS back as usual
Kudos to OPs: @bullghost , @shakeyabooti , @leptdre , @jam1445 and other posters on G4 section of XDA!
Hope this helps someone!
Click to expand...
Click to collapse
I just did all your steps for my VS986 , and I got 2 G4 Verizon's back up and working , Thank you so much.
---------- Post added at 10:54 AM ---------- Previous post was at 10:53 AM ----------
I just did all your steps for my VS986 , and I got 2 G4 Verizon's back up and working , Thank you so much.

I'm using a 16gb microsd, but however I try to image it (exfat, fat32 filesystems, different win32imager versions) also have tried different cables, but it still doesn't show any sign of life. I bricked it exactly the same way as OP did. Does anyone have anything else I could try to fix this? Also does the battery charge when its on 9008 mode?

inteLzzz said:
I'm using a 16gb microsd, but however I try to image it (exfat, fat32 filesystems, different win32imager versions) also have tried different cables, but it still doesn't show any sign of life. I bricked it exactly the same way as OP did. Does anyone have anything else I could try to fix this? Also does the battery charge when its on 9008 mode?
Click to expand...
Click to collapse
Can you get at least to the IMEI Display mode (Vol UP and then quickly Vol DOWN, keep both pressed until it shows up)?

Jirrick said:
Can you get at least to the IMEI Display mode (Vol UP and then quickly Vol DOWN, keep both pressed until it shows up)?
Click to expand...
Click to collapse
No could it be caused by low battery? I remember it being like 30% when I bricked it, and does it charge under 9008 mode?

Sorry to hear that. I'm afraid this is beyond my knowledge if it wont even enter the IMEI screen. I suppose you can leave it bootlooping in charger over night and then try in the morning?

Jirrick said:
Sorry to hear that. I'm afraid this is beyond my knowledge if it wont even enter the IMEI screen. I suppose you can leave it bootlooping in charger over night and then try in the morning?
Click to expand...
Click to collapse
It does not bootloop, straight up dead. Just shows 9008 forever on the pc, I left it for like 2 hours like that yesterday. I'll leave it overnight today and if not I'll hack up a direct 5v 1a charger to charge the battery directly. If both don't work i'll probably flash LS991 files in QFIL and use it as a tablet afterwards.. damn i got this phone not even 2 weeks ago perfect condition and all. Will not buy any more damn LG devices.

Oh, I thought your phone was rapidly bootlooping like mine did. Sounds like the person who sold it to you was aware that the phone is on last legs (probably even baked the phone so it runs for few days more) and screwed you over. My next phone wont be LG either.

Flash failed, stuck in download mode (H815)

Hi guys,
for the last months I was using LineageOs, but since they dropped development for our device I wanted to get rid of it.
I tried to get AOSP running but failed. Next I flashed a stock kdz file in Download Mode using LGUP and it worked,
I was back to stock. I tried to install AOSP through TWRP but failed again and eventually ended up doing a hard reset.
This temporarily bricked the device because now the stock android booted and Android Device Protection (FRP) was
active and didn't let me log in. Desperate to find a solution I flashed random kdz/tot files for the device that I found on
the Internet until one finally worked (LGH815 EU Nougat 7.0 BySezerSimsek), the FRP thing was gone. Then I tried to at
least get back to stock again, but when I tried to flash the stock kdz file LGUP aborts at 25% with Error Code 0x2000.
Every time I start the phone now, it goes directly in this firmware update/download mode.
The device shows up as "LGE AndroidNet USB Serial Port" In Windows Device Manager
In Download mode it says "633A B92 Official" on the display
I already tried:
Different dll files for LGUP
Using LG Flash Tool 2014 instead
Putting dump file on SD card
Should I put it in 9008 mode and work with QFIL or what am I supposed to do now?
Thank you.

I'm still able to get into fastboot mode btw. But I'm going to wait for replies here
before I make things worse. If that's even possible at this point. :silly:

h4yabu5a said:
I'm still able to get into fastboot mode btw. But I'm going to wait for replies here
before I make things worse. If that's even possible at this point. :silly:
Click to expand...
Click to collapse
:highfive:<-

jason_l367 said:
:highfive:<-
Click to expand...
Click to collapse
My phone is alive again, thanks Jason:laugh:
Just a short recap what I've done now in case it helps someone with the same problem, the full instructions
are in Jasons link.
I used the KDZ and TOT Extractor to extract the LGUP8994.dll file out of a stock Marshmallow v20p KDZ.
I renamed the dll to LGUP_8994.dll and moved it to C:\..\LG Electronics\LGUP\model\8994, overriding the
existing file. Now LGUP was able to flash the v20p KDZ without the 0x2000 Error.

LG G4 H818N Stuck in Download Mode

Hi, I've been trying to fix my H818N from the past couple of days.
Here is what I did to brick it, unfortunately
1. Downloaded Nougat 7.0 TOT file (H818P v29a TOT) from this website: androidsage lg g4 android 7 0 nougat firmware
2. Started my G4 into download mode and tried to load this TOT file using LG UP, however, LG UP stopped me by displaying an error message: Invalid TOT file
3. Then I used WinHex to change H818P to H818N in the TOT file and saved it
4. Now I was able to upload this file to my G4 in Refurbished mode using LG UP, the upload completed, phone rebooted and displayed: Erasing
5. After that it is stuck in download mode (If I restart it, it displays LG logo and starts download mode automatically)
6. In Download mode, my phone displays this at the bottom of screen:
U 633A s12. 0 AS10. 5 B100 UHS
S U LG-H818N 07.0 Hrev_10 .CPU4
H81529a
Here is what I did till now without any success:
1. installed the latest LG drivers, LG UP, and LG Flash tools on my PC
2. Tried to Flash the following firmwares using LG UP/ LG Flash Tool (I also extracted the dll file from each firmware one by one and placed in the model folder for LG UP while trying)
H815 V20o Modded.kdz
H818N10l_00_0113.kdz
H818N20f_00_0818.kdz
H818N20h_00_1019.kdz
H81520p_00_0403.kdz
H81820p_00_0314.kdz
Hong Kong H818N10b.kdz
H81520p_00_0314.kdz
H815TR20g_00_0428.kdz
F500K20C_00.kdz
All the firmwares get stuck at Internal command failed 9%, 11%, 24%
3) I have scoured the internet but wasn't able to find a solution yet
4) I even tried using the fastboot mode but unfortunately the bootloader is locked and I cannot erase the recovery or image
Now I'm not sure what else can be done to bring my phone back to life. I might try to get it into Qualcomm 9008 mode and try to unbrick it by following this guide: pakfones unbrick lg g4 hard bricked
Any help on this will be much appreciated

tgunn said:
Hi, I've been trying to fix my H818N from the past couple of days.
Here is what I did to brick it, unfortunately
1. Downloaded Nougat 7.0 TOT file (H818P v29a TOT) from this website: androidsage lg g4 android 7 0 nougat firmware
2. Started my G4 into download mode and tried to load this TOT file using LG UP, however, LG UP stopped me by displaying an error message: Invalid TOT file
3. Then I used WinHex to change H818P to H818N in the TOT file and saved it
4. Now I was able to upload this file to my G4 in Refurbished mode using LG UP, the upload completed, phone rebooted and displayed: Erasing
5. After that it is stuck in download mode (If I restart it, it displays LG logo and starts download mode automatically)
6. In Download mode, my phone displays this at the bottom of screen:
U 633A s12. 0 AS10. 5 B100 UHS
S U LG-H818N 07.0 Hrev_10 .CPU4
H81529a
Here is what I did till now without any success:
1. installed the latest LG drivers, LG UP, and LG Flash tools on my PC
2. Tried to Flash the following firmwares using LG UP/ LG Flash Tool (I also extracted the dll file from each firmware one by one and placed in the model folder for LG UP while trying)
H815 V20o Modded.kdz
H818N10l_00_0113.kdz
H818N20f_00_0818.kdz
H818N20h_00_1019.kdz
H81520p_00_0403.kdz
H81820p_00_0314.kdz
Hong Kong H818N10b.kdz
H81520p_00_0314.kdz
H815TR20g_00_0428.kdz
F500K20C_00.kdz
All the firmwares get stuck at Internal command failed 9%, 11%, 24%
3) I have scoured the internet but wasn't able to find a solution yet
4) I even tried using the fastboot mode but unfortunately the bootloader is locked and I cannot erase the recovery or image
Now I'm not sure what else can be done to bring my phone back to life. I might try to get it into Qualcomm 9008 mode and try to unbrick it by following this guide: pakfones unbrick lg g4 hard bricked
Any help on this will be much appreciated
Click to expand...
Click to collapse
Hi.. any help on this please

tgunn said:
Hi.. any help on this please
Click to expand...
Click to collapse
I had similar. LG Bridge helped me.

tgunn said:
Hi, I've been trying to fix my H818N from the past couple of days.
Here is what I did to brick it, unfortunately
1. Downloaded Nougat 7.0 TOT file (H818P v29a TOT) from this website: androidsage lg g4 android 7 0 nougat firmware
2. Started my G4 into download mode and tried to load this TOT file using LG UP, however, LG UP stopped me by displaying an error message: Invalid TOT file
3. Then I used WinHex to change H818P to H818N in the TOT file and saved it
4. Now I was able to upload this file to my G4 in Refurbished mode using LG UP, the upload completed, phone rebooted and displayed: Erasing
5. After that it is stuck in download mode (If I restart it, it displays LG logo and starts download mode automatically)
6. In Download mode, my phone displays this at the bottom of screen:
U 633A s12. 0 AS10. 5 B100 UHS
S U LG-H818N 07.0 Hrev_10 .CPU4
H81529a
Here is what I did till now without any success:
1. installed the latest LG drivers, LG UP, and LG Flash tools on my PC
2. Tried to Flash the following firmwares using LG UP/ LG Flash Tool (I also extracted the dll file from each firmware one by one and placed in the model folder for LG UP while trying)
H815 V20o Modded.kdz
H818N10l_00_0113.kdz
H818N20f_00_0818.kdz
H818N20h_00_1019.kdz
H81520p_00_0403.kdz
H81820p_00_0314.kdz
Hong Kong H818N10b.kdz
H81520p_00_0314.kdz
H815TR20g_00_0428.kdz
F500K20C_00.kdz
All the firmwares get stuck at Internal command failed 9%, 11%, 24%
3) I have scoured the internet but wasn't able to find a solution yet
4) I even tried using the fastboot mode but unfortunately the bootloader is locked and I cannot erase the recovery or image
Now I'm not sure what else can be done to bring my phone back to life. I might try to get it into Qualcomm 9008 mode and try to unbrick it by following this guide: pakfones unbrick lg g4 hard bricked
Any help on this will be much appreciated
Click to expand...
Click to collapse
Hi friend,
No issues, even I faced the same problem. Now everything ok, just click this link https://forum.xda-developers.com/g4/general/update-lg-g4-h818p-to-android-7-lg-h815-t3677485/page5
and go to that page, you may find the post by esco_448
Modified KDZ link to downgrade from nougat to Marshmallow
https://mega.nz/#!BKRnDLIZ!K46qoXNhW...XJDd9MhuNdb-WA
Also please use this dll with LGUP.
https://mega.nz/#!lShUlbgK!ZjNfIbPSv...ZDThw7HQ7ZZkKU
In addition edit the downloaded file, with winhex, then do the normal procedure as you do before, thats all.
Good luck
Sangames

[NEED HELP] Korean Pie on LM-G10V Problem (Softbricked?)

So, I happened to follow the steps in this video : https://www.youtube.com/watch?v=qJ4w7G8zl7s on how to install the Korean Pie Kdz to ANY G7 but it resulted to me having issues with the phone such as : The phone would Reboot by itself randomly and my WiFI Mac address turned 02:00:00:00:00.
UNIT INFO
Before the Procedure
I was running an LM-G710V 10b with an unlocked boot loader
Flashed with Oreo AOSP Treble
Has Fastboot access
No Recovery Access
Magisk Installed but no TWRP.
After the Procedure
the Phone model shows LM-G710N 20c
I can not access Fastboot mode thru either button combo or ADB (Both would only reboot the phone normally).
OEM unlock in developer options is greyed out saying Bootloader is already unlocked
No ROOT ACCESS
Can Access Download mode and (useless)Stock Recovery (Thru ADB)
Phone boots normally, however it would reboot randomly.
Additional Notes:
I used LGUP 1.14.3 and the kdz from this thread: https://forum.xda-developers.com/lg-g7-thinq/how-to/pie-korean-kdz-g710n20c00lgukrop0107-t3891207
LGUP can still recognize the phone, however the model now is LM-G710N, and unfortunately LG Bridge does not recognize the phone.
Any Help or Inputs in resolving this would be greatly Appreciated !

xElouise said:
So, I happened to follow the steps in this video :
on how to install the Korean Pie Kdz to ANY G7 but it resulted to me having issues with the phone such as : The phone would Reboot by itself randomly and my WiFI Mac address turned 02:00:00:00:00.
UNIT INFO
Before the Procedure
Flashed with Oreo AOSP Treble
Has Fastboot access
No Recovery Access
Magisk Installed but no TWRP.
After the Procedure
I can not access Fastboot mode thru either button combo or ADB (Both would only reboot the phone normally).
OEM unlock in developer options is greyed out saying Bootloader is already unlocked
No ROOT ACCESS
Can Access Download mode and (useless)Stock Recovery (Thru ADB)
Phone boots normally, however it would reboot randomly.
Additional Notes:
I used LGUP 1.14.3 and the kdz from this thread: https://forum.xda-developers.com/lg-g7-thinq/how-to/pie-korean-kdz-g710n20c00lgukrop0107-t3891207
LGUP can still recognize the phone, however the model now is LM-G710N, and unfortunately LG Bridge does not recognize the phone.
Any Help or Inputs in resolving this would be greatly Appreciated !
Click to expand...
Click to collapse
That shouldn't happen at all. You can try to make the same procedure again but flashing an Oreo kdz.
Edit: also what model was your phone originally?

LameMonster82 said:
That shouldn't happen at all. You can try to make the same procedure again but flashing an Oreo kdz.
Edit: also what model was your phone originally?
Click to expand...
Click to collapse
It's the retail unit LM-G710V 10b.
I don't know what Oreo kdz would be applicable for this unit.
*Typo on Title, Should be LM-G710V
-Update-
So i tried to flash another kdz "G710VMX10j_00_USC_US_OP_1120.kdz" , it completed but gave me a Kernel Crash (entered Sahara Mode) at first boot, then rebooted normally but still my Phone model remained LMG710N but it's now 10j instead of 20c. It still reboots randomly.
-Pics-
Snapped a pick of the Kernel Crash & After Oreo kdz flash : https://imgur.com/a/tgZoXCk
-UPDATE 02-
02/06/19
So I Tried it with SALT and this comes up on the main GUI
https://imgur.com/a/lKUeLqG
SALT also can not read the phone's partitions.
Attachments are some logs from SALT.
-Opinion-
I am suspecting the the problem lies within the phone itself. Maybe some corrupted partitions that became unflashable.
LGUP DFT says there is a mismatch on PRIMARY GPT no matter what kdz i flash.