Develop Bugs

[Q] stuck in recovery mode f240l

hi everyone
I got F240L for about 4 months
I did factory reset the phone got stuck in recovery mode please help i cant flash it with lg tool
when i do all the steps i get the same error again
bettery level is low and upgrade is unavailable
upgrade halted dy lack of battery power may cause serious errors in the phone software.recharge the battery fully and try upgrade again
i put another battery but i have the same error please HELPPPPP :crying:

Did you find fix?

I have the exact same problem! Any help would be highly appreciated.

Daem0n said:
I have the exact same problem! Any help would be highly appreciated.
Click to expand...
Click to collapse
Had same issue....I used LG's pc suit to recover my phone its simple and brings your phone back to the firmware you were on for your version.

LG's PC Suite didn't work for me. All I got was the battery error described above. However, I managed to recover my phone using this guide.

You can follow this method
http://forum.xda-developers.com/showthread.php?t=2396048

Using LGFlashtool 2014 is the best way.
Flash your F240 with Kitkat kdz file using LGFlashtool 2014.
Root.
Flash Kitkat Recovery.
Reboot to Recovery.
Flash TWRP Recovery in CWM.
Reboot to TWRP Recovery.
Flash SEUXG5 zip file created by SHIELD.
Done.
Right now I'm using SEUX G5 by Shield.
So far this rom is the fastest and stable for my F240L, got 31500 score in Antutu 6.1.4
Not to mention best battery life also.

Daem0n said:
LG's PC Suite didn't work for me. All I got was the battery error described above. However, I managed to recover my phone using this guide.
Click to expand...
Click to collapse
That guide says it wipes your data. Did your user data get wiped from flashing? I need a non wiping method to get my phone loaded again.
Im not rooted, never was. Phone turned off on its own, after I set it down, without installing anything. please help.

[Q] Need help with my E-988

I hope someone can help me.
I bought an LG Pro E-988 which is already rooted and have a nightly CM11 installed.
I saw the LG Flex Rom and tried to install. I hit an error (Status 7), so I restored my back up. It booted correctly and decided to install/run the LG Recovery and Freegee apps as I suspected that the error (Status 7) was because I didn't install the apps before the LG Flex ROM.
After I run FreeGee, I restarted in recovery and tried to install the ROM but still same error (Status 7). So I decided to restore my back up again, but this time around, the boot is not pushing through. I'm stuck in the LG Logo.
Has anyone experienced this before and maybe you can help me to fix my phone.
I admit I got a bit excited rooting and flashing custom ROMs again after 1 year of hiatus.
Thanks in advance!!

hd2_droid said:
I hope someone can help me.
I bought an LG Pro E-988 which is already rooted and have a nightly CM11 installed.
I saw the LG Flex Rom and tried to install. I hit an error (Status 7), so I restored my back up. It booted correctly and decided to install/run the LG Recovery and Freegee apps as I suspected that the error (Status 7) was because I didn't install the apps before the LG Flex ROM.
After I run FreeGee, I restarted in recovery and tried to install the ROM but still same error (Status 7). So I decided to restore my back up again, but this time around, the boot is not pushing through. I'm stuck in the LG Logo.
Has anyone experienced this before and maybe you can help me to fix my phone.
I admit I got a bit excited rooting and flashing custom ROMs again after 1 year of hiatus.
Thanks in advance!!
Click to expand...
Click to collapse
Nothing to worry about. Here is a pinned post where you can find all the information you need.
Just download your kdz from here and follow the steps from this post
Download kdz, install lg flashtool, lg drivers, after turning off your phone, press volume up and down together and connect your usb cable to get into download mode, then follow those pictures in that post to flash the kdz. You will be back to stock.

spirallingspiral said:
Nothing to worry about. Here is a pinned post where you can find all the information you need.
Just download your kdz from here and follow the steps from this post
Download kdz, install lg flashtool, lg drivers, after turning off your phone, press volume up and down together and connect your usb cable to get into download mode, then follow those pictures in that post to flash the kdz. You will be back to stock.
Click to expand...
Click to collapse
Thanks a lot man :good:! Although, I'm stuck with 'Connection error' in the FlashTool. Is this normal? I tried again and again more than 20 times but I'm getting the same connection error.
Also, earlier I was still able to go to recovery, but now even if I press the power button it goes straight to the download mode.
Hope you can help again.

You cant get out of download mode? did you try volume down and power button together for 5 secs? And btw what error are u getting on flash tool? its not detecting your phone? Did you install the mobile drivers?

spirallingspiral said:
You cant get out of download mode? did you try volume down and power button together for 5 secs? And btw what error are u getting on flash tool? its not detecting your phone? Did you install the mobile drivers?
Click to expand...
Click to collapse
The error was in the LG Mobile Support Tool (sorry to in the Flash tool). During the upgrading of the phone it always give the error - 'Connection to server failed. Try again in a moment'
Also, if I try to turn on the phone it will not boot but go straight to download mode.

hd2_droid said:
The error was in the LG Mobile Support Tool (sorry to in the Flash tool). During the upgrading of the phone it always give the error - 'Connection to server failed. Try again in a moment'
Also, if I try to turn on the phone it will not boot but go straight to download mode.
Click to expand...
Click to collapse
Did you remove the battery and put it back in? And it still goes to download mode? Try starting the phone pressing Volumedown+power key for sometime or you could try Volumeup+Homekey+Power to boot into recovery and try restoring backup or flashing some other rom and see if you can get out of boot. I really don't know why you are getting that connection problem. I got stuck at boot a couple of times and followed exactly what was given in that post and reverted back to stock. I guess some of the senior members will help you here. Meanwhile ill see if i can search a solution for that connection error, i haven't faced that yet so i really don't know the fix. There is a second TOT method given in that post, that might help.

spirallingspiral said:
Did you remove the battery and put it back in? And it still goes to download mode? Try starting the phone pressing Volumedown+power key for sometime or you could try Volumeup+Homekey+Power to boot into recovery and try restoring backup or flashing some other rom and see if you can get out of boot. I really don't know why you are getting that connection problem. I got stuck at boot a couple of times and followed exactly what was given in that post and reverted back to stock. I guess some of the senior members will help you here. Meanwhile ill see if i can search a solution for that connection error, i haven't faced that yet so i really don't know the fix. There is a second TOT method given in that post, that might help.
Click to expand...
Click to collapse
Yup, i tried removing the battery. Also tried different key combos to boot but it all goes to the download mode, with the small with box in the middle.
I also tried the option of going straight to the LG mobile support tool (not the LG Flash tool). But the same server connectiom error.
Thanks again for the help.
Hope other members can help me too.

Since I'm not able to do recovery using the KDZ file. Can I use the TOT file?
I have E988 Singapore version, but the last ROM installed was with a CM11. And in the Phone details it shows E980.
Will it work or will it just make things worst?

hd2_droid said:
Since I'm not able to do recovery using the KDZ file. Can I use the TOT file?
I have E988 Singapore version, but the last ROM installed was with a CM11. And in the Phone details it shows E980.
Will it work or will it just make things worst?
Click to expand...
Click to collapse
I haven't flashed using TOT method so i cant comment on that. I heard few people had trouble using flashtool on windows 8, are u you using windows 8? maybe try the kdz method again from a windows 7.

spirallingspiral said:
I haven't flashed using TOT method so i cant comment on that. I heard few people had trouble using flashtool on windows 8, are u you using windows 8? maybe try the kdz method again from a windows 7.
Click to expand...
Click to collapse
Yeah, I read that also. I used a windows 8 pc previously, that might be causong the connection error. I will try my old pc and hopefully it will work.
Thank you!

[Q] [q] please help me!!, hard bricked my lg g2, please help!!

:crying: This problem started when I tried to install ResurrectionRemix Rom for the The LS980, I had a ZVE Radio on my phone, before I rooted my device, I used StumpRoot to root my phone, then after that I installed autorec to be able to use TWRP, then after that i backed up my device so that I can start flashing the Rom, so after that I wiped Dalvik/Cache/Data, etc, except for internal storage, then i install the Rom, and after that I installed the Gapps for the Rom, and after that I wiped Dalvik and Cache and restarted my device, and its now going into a bootloop, so at this point I'm still able to go into TWRP so that I can be able to restore my backup, but it wasn't there, so I went back to the Install tab and it looked different like it was less files than before, it's like the system on my phone re-wrote itself, idk, so then I went into the file manager that is in TWRP to search for my backup file, I found it along with all my other files, but I didn't know how to be able to restore it, so (I think this is were I made things worse for myself) I went to the Install Tab to install the ZVC Radio, because I thought the Rom wasn't working because of the different Radios my device had, so then I restart my phone, and now it's just a blank screen, that keeps looping, so I started searching on XDA if anyone else is facing this issue, and I found this thread http://forum.xda-developers.com/showthread.php?t=2582142 it helped me get out of the deep brick whereas there was no recovery mode before, But I'm still in a Hard Brick whereas the LG Logo is shown for several seconds and then it says LG Security Error and shuts down and I still dont have download mode, but if I'm connected to a computer it just goes into a bootloop with the same message on the screen, so I installed LG drivers and ADB Drivers for my phone to be recognized on the computer, and the computer recognizes the device when I'm in recovery mode, but at this point I don't know what to do, and I certainly don't want to spend 150.00$ for a replacement, so if anyone can help me, I will very much appreciate it.
Images Below (Forgive me if the image quality is a little fuzzy, these images were taken using my Nexus 4)

TechGirl90 said:
:crying: This problem started when I tried to install ResurrectionRemix Rom for the The LS980, I had a ZVE Radio on my phone, before I rooted my device, I used StumpRoot to root my phone, then after that I installed autorec to be able to use TWRP, then after that i backed up my device so that I can start flashing the Rom, so after that I wiped Dalvik/Cache/Data, etc, except for internal storage, then i install the Rom, and after that I installed the Gapps for the Rom, and after that I wiped Dalvik and Cache and restarted my device, and its now going into a bootloop, so at this point I'm still able to go into TWRP so that I can be able to restore my backup, but it wasn't there, so I went back to the Install tab and it looked different like it was less files than before, it's like the system on my phone re-wrote itself, idk, so then I went into the file manager that is in TWRP to search for my backup file, I found it along with all my other files, but I didn't know how to be able to restore it, so (I think this is were I made things worse for myself) I went to the Install Tab to install the ZVC Radio, because I thought the Rom wasn't working because of the different Radios my device had, so then I restart my phone, and now it's just a blank screen, that keeps looping, so I started searching on XDA if anyone else is facing this issue, and I found this thread http://forum.xda-developers.com/showthread.php?t=2582142 it helped me get out of the deep brick whereas there was no recovery mode before, But I'm still in a Hard Brick whereas the LG Logo is shown for several seconds and then it says LG Security Error and shuts down and I still dont have download mode, but if I'm connected to a computer it just goes into a bootloop with the same message on the screen, so I installed LG drivers and ADB Drivers for my phone to be recognized on the computer, and the computer recognizes the device when I'm in recovery mode, but at this point I don't know what to do, and I certainly don't want to spend 150.00$ for a replacement, so if anyone can help me, I will very much appreciate it.
Images Below (Forgive me if the image quality is a little fuzzy, these images were taken using my Nexus 4)
Click to expand...
Click to collapse
All non stock require zv8 radio. If your highlighted image in recovery says update by adb. You may be able to grab official zve update from sprint g2 general.
Or hit the wipe data and see if it goes to TWRP.

secret.animal said:
All non stock require zv8 radio. If your highlighted image in recovery says update by adb. You may be able to grab official zve update from sprint g2 general.
Or hit the wipe data and see if it goes to TWRP.
Click to expand...
Click to collapse
It didn't go through.[emoji20] Installation aborted, I think I messed up big time.[emoji20] I appreciate the help though.
Sent from my Nexus 4 using Tapatalk

TechGirl90 said:
It didn't go through.[emoji20] Installation aborted, I think I messed up big time.[emoji20] I appreciate the help though.
Sent from my Nexus 4 using Tapatalk
Click to expand...
Click to collapse
Which part or both fail? The wipe data to TWRP, is a shot in the dark in going to recovery. Adb side load official update was also.
I read somewhere of repairing the partitions by pushing them. I'll see if I can find that thread.

secret.animal said:
Which part or both fail? The wipe data to TWRP, is a shot in the dark in going to recovery. Adb side load official update was also.
I read somewhere of repairing the partitions by pushing them. I'll see if I can find that thread.
Click to expand...
Click to collapse
Both failed, the wipe data just freezes and goes no further, and I can't get to twrp, I just have the basic recovery mode.
Sent from my Nexus 4 using Tapatalk

TechGirl90 said:
Both failed, the wipe data just freezes and goes no further, and I can't get to twrp, I just have the basic recovery mode.
Sent from my Nexus 4 using Tapatalk
Click to expand...
Click to collapse
Let's hope I find that thread.
---------- Post added at 04:04 PM ---------- Previous post was at 03:48 PM ----------
TechGirl90 said:
Both failed, the wipe data just freezes and goes no further, and I can't get to twrp, I just have the basic recovery mode.
Sent from my Nexus 4 using Tapatalk
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2681089
Try this one which I got from
http://forum.xda-developers.com/sprint-g2/help/ls980-bricked-black-screen-fastboot-t2976744
He quoted 2 threads he tried. I clicked the one I have above first and looked like a good help.

TechGirl90 said:
Both failed, the wipe data just freezes and goes no further, and I can't get to twrp, I just have the basic recovery mode.
Sent from my Nexus 4 using Tapatalk
Click to expand...
Click to collapse
Have you been able to resurrect your phone?

secret.animal said:
Have you been able to resurrect your phone?
Click to expand...
Click to collapse
Nope, the phone's dead, I really damaged the phone's software really bad, I didn't follow the instructions correctly as stated on the RessurectionRemix Rom Thread , so I've brought this upon myself, Thankfully I've received a replacement today, but now I'm feeling iffy about rooting my phone and flashing roms again, because I don't want to go through this predicament again.
Update: Thank You for helping me try to get the device back into a functional state, I really appreciate it

on same boat
hey, techgirl90,
on same boat only have stock recovery
pls help me if you have find anyone

[solved] D855 Softbrick - need help - DL mode working but no succesful flash

Hey guys, I need your help!
I tried to make my long story short, but that didn't work, so here's my complete story:
When everything was fine, I had CM13 running with TWRP 2.8.5.0.
My first intention was to restore a Stock 4.4 Backup and update it to 5.x. After restoring it didn't boot, so I did a factory reset and it worked.
Next I wanted to update to 5.0 via OTA, but that ofc couldn't work because of TWRP.
I knew the only way to update to 5.x was to flash a .kdz an lose all data. I didn't want to do that, so instead I tried to flash the official 30B image from here.
I followed the instructions given in the first post (updated TWRP to 2.8.7.0 too), but after flashing the files and hitting the "reboot system" button in TWRP it booted into TWRP again. I tried flashing again because maybe something went wrong. I even downloaded all the files again to make sure I didn't have a bad download, but no luck. So I restored the previous CM13 6.0.1 rom. At first it didn't succeed because my internal memory was full, but after deleting the 30B files it restored just fine. So when it was ready I hit the reboot button aaaannd it booted into TWRP AGAIN...
I searched the internet and found a "LG_G3_Flash2FixStuckRecovery.zip" file, but that didn't help either. (I connected my G3 to my pc using MTP in TWRP to backup all important data, so I don't care if I need to wipe everything.)
Now I knew something went badly wrong and tried using the LG flashtool 2014 for .kdz and another one for .tot files to recover my G3.
Still no luck. When using the 2014 tool and the official 30B kdz it runs till 100% at my phone (at the same time it reaches 80% on my pc at the LG mobile support tool). But then it's only showing the LG logo for some seconds, screen black, lg logo, black, ... an infinite loop.
When using the .tot method I can't get past the "Model Information Check FAIL!" message. It looks like I lost my IMEI because it shows "IMEI: NULL". I got an EFS Backup in a zip file though, so it's not completely lost. I tried both methods on 2 different pc's with win 8.1 and 7 (and win10 for some things), but I always get the same results.
When turning it on using the power button, I see the LG logo followed by a black screen and again the LG logo.
When connecting it to the charger I at first see a charging screen, not the charging animation, but the "loading" battery screen you get before the animation. But after it I get stuck in the above mentioned LG logo.
It's possible to get to the factory reset screen, but I get to the LG logo again after "performing" a factory reset. Note: On the factory reset screen, there is a blue "part" on the top of the screen which looks different compared to when using CM13 and Stock 4.4. The blue color is darker, so I guess, I partly got 30B installed.
I didn't plan to write that much, but I think it's better because I described almost everything I did.
I have no idea what to do now, I tried everything I know and could find on the internet.
So I just hope someone is able to help me getting my G3 working again.
Many thanks!
tl;dr: Only download mode left, but can't succesfully flash any stock rom.

Now... what do u want.... ????
Downgrade from mm to lollipop.... right????
... I can help you... by teamview. Ok

reepje123 said:
Hey guys, I need your help!
I tried to make my long story short, but that didn't work, so here's my complete story:
When everything was fine, I had CM13 running with TWRP 2.8.5.0.
My first intention was to restore a Stock 4.4 Backup and update it to 5.x. After restoring it didn't boot, so I did a factory reset and it worked.
Next I wanted to update to 5.0 via OTA, but that ofc couldn't work because of TWRP.
I knew the only way to update to 5.x was to flash a .kdz an lose all data. I didn't want to do that, so instead I tried to flash the official 30B image from here.
I followed the instructions given in the first post (updated TWRP to 2.8.7.0 too), but after flashing the files and hitting the "reboot system" button in TWRP it booted into TWRP again. I tried flashing again because maybe something went wrong. I even downloaded all the files again to make sure I didn't have a bad download, but no luck. So I restored the previous CM13 6.0.1 rom. At first it didn't succeed because my internal memory was full, but after deleting the 30B files it restored just fine. So when it was ready I hit the reboot button aaaannd it booted into TWRP AGAIN...
I searched the internet and found a "LG_G3_Flash2FixStuckRecovery.zip" file, but that didn't help either. (I connected my G3 to my pc using MTP in TWRP to backup all important data, so I don't care if I need to wipe everything.)
Now I knew something went badly wrong and tried using the LG flashtool 2014 for .kdz and another one for .tot files to recover my G3.
Still no luck. When using the 2014 tool and the official 30B kdz it runs till 100% at my phone (at the same time it reaches 80% on my pc at the LG mobile support tool). But then it's only showing the LG logo for some seconds, screen black, lg logo, black, ... an infinite loop.
When using the .tot method I can't get past the "Model Information Check FAIL!" message. It looks like I lost my IMEI because it shows "IMEI: NULL". I got an EFS Backup in a zip file though, so it's not completely lost. I tried both methods on 2 different pc's with win 8.1 and 7 (and win10 for some things), but I always get the same results.
When turning it on using the power button, I see the LG logo followed by a black screen and again the LG logo.
When connecting it to the charger I at first see a charging screen, not the charging animation, but the "loading" battery screen you get before the animation. But after it I get stuck in the above mentioned LG logo.
I didn't plan to write that much, but I think it's better because I described almost everything I did.
I have no idea what to do now, I tried everything I know and could find on the internet.
So I just hope someone is able to help me.
Many thanks!
tl;dr: Only download mode left, but can't succesfully flash any stock rom.
Click to expand...
Click to collapse
Did you try other version frimwares then 30B because mabye that will work

SpaceRaider said:
Did you try other version frimwares then 30B because mabye that will work
Click to expand...
Click to collapse
Waiting for rom then 30B... how long....???

mchiensd said:
Waiting for rom then 30B... how long....???
Click to expand...
Click to collapse
What do you mean?

mchiensd said:
Now... what do u want.... ????
Click to expand...
Click to collapse
I just want to get my G3 working again, doesn't matter if stock or CM rom
SpaceRaider said:
Did you try other version frimwares then 30B because mabye that will work
Click to expand...
Click to collapse
I tried 21A .kdz and 10E or .tot. When using 21A kdz it gives an error. It tells me something like connect my phone again and try again. Only the 30B was kinda flashable.
mchiensd said:
Waiting for rom then 30B... how long....???
Click to expand...
Click to collapse
Ehm what?

SpaceRaider said:
What do you mean?
Click to expand...
Click to collapse
No... it is not but
Reepie123 cant flash (downgrade) when flash rom kdz 30B...
Yesterday... i aslo was it... for 8h search on 4rum...
I can downgrade it .... and now.. i want help reepie123. Hi.

reepje123 said:
I just want to get my G3 working again, doesn't matter if stock or CM rom
I tried 21A .kdz and 10E or .tot. When using 21A kdz it gives an error. It tells me something like connect my phone again and try again. Only the 30B was kinda flashable.
Ehm what?
Click to expand...
Click to collapse
I think you've hardbricked it

SpaceRaider said:
I think you've hardbricked it
Click to expand...
Click to collapse
No,... i think it is softbrick... but we dont know ways.

SpaceRaider said:
I think you've hardbricked it
Click to expand...
Click to collapse
You mean it's dead, completely? I thought having a download mode and seeing my G3 on my pc with a COM# port is better than seeing some QHBULK_9008 device or similar, where I need to open my G3, connect pins and some sh*t to recover it.

reepje123 said:
You mean it's dead, completely? I thought having a download mode and seeing my G3 on my pc with a COM# port is better than seeing some QHBULK_9008 device or similar, where I need to open my G3, connect pins and some sh*t to recover it.
Click to expand...
Click to collapse
It is not dead, you can always fix it but it is a very weird issue

SpaceRaider said:
It is not dead, you can always fix it but it is a very weird issue
Click to expand...
Click to collapse
Oh ok, that sounds better. So there is hope and we just need someone who knows what to do.

reepje123 said:
Oh ok, that sounds better. So there is hope and we just need someone who knows what to do.
Click to expand...
Click to collapse
Are You have Rom TOT 10x...???

mchiensd said:
Are You have Rom TOT 10x...???
Click to expand...
Click to collapse
Yes, I already tried the 10E tot. But the problem is that the flash tools gives an error: "Model Information Check FAIL!".

reepje123 said:
Yes, I already tried the 10E tot. But the problem is that the flash tools gives an error: "Model Information Check FAIL!".
Click to expand...
Click to collapse
Mabye that's because of your IMEI error

SpaceRaider said:
Mabye that's because of your IMEI error
Click to expand...
Click to collapse
I guess so, but how do I restore my EFS without having TWRP?

reepje123 said:
Yes, I already tried the 10E tot. But the problem is that the flash tools gives an error: "Model Information Check FAIL!".
Click to expand...
Click to collapse
OK.... Now, you flash TOT again with TOT file.... but dont change file DLL you have....
Download... file DLL fix...
https://drive.google.com/file/d/0B0VrTZddvLF7b3Q1b1BlQ2w0clE/view?usp=sharing

Also don't forget: Maybe its because of your OS or even Setup (Hardware/Driver related). Even if it works seemingly at first glance.
That's my experience with all flashing tools that on some machines and setups there will happen some funny stuff and corrupt systems even if its reported to be working initially.
So if you didn't try yet use another PC/Laptop preferably with Windows 7 to 8.0 (only if you disabled driver signatures)
Edit: Also try different USB-Cables.

mchiensd said:
OK.... Now, you flash TOT again with TOT file.... but dont change file DLL you have....
Download... file DLL fix...
https://drive.google.com/file/d/0B0VrTZddvLF7b3Q1b1BlQ2w0clE/view?usp=sharing
Click to expand...
Click to collapse
I couldn't find another dll. Where have you got that from? Is it safe to use?
justyourimage said:
Also don't forget: Maybe its because of your OS or even Setup (Hardware/Driver related). Even if it works seemingly at first glance.
That's my experience with all flashing tools that on some machines and setups there will happen some funny stuff and corrupt systems even if its reported to be working initially.
So if you didn't try yet use another PC/Laptop preferably with Windows 7 to 8.0 (only if you disabled driver signatures)
Edit: Also try different USB-Cables.
Click to expand...
Click to collapse
I already tried 2 PCs, one with 8.1 and another one with 7 (and 10). Both are giving almost the same result. Except the .kdz flash tool crashes on 8.1 at 99%.
I'm using the original USB cable.

reepje123 said:
I couldn't find another dll. Where have you got that from? Is it safe to use?
Click to expand...
Click to collapse
Used file DLL this to restore Lollipop for my LG D855... when i flash KDZ 30B
It safe!!!!
it from user autoprime in 4rum....

LG G4 H815 Euro - Troubles flashing stock ROM

Hello to all of you,
Thanks in advance for any help you can provide.
I bought second hand a LG G4 H815 with CyanogenMod 14 already installed on it.
Everything was fine until I installed my Ebanking apps, that would not function with an unlocked bootloader. I needed to return to a clean factory safe state...
It was the second time I flashed a rom in my whole life, the first one was a Galaxy S plus years ago.
I followed all the instructions for the KDZ flash in this tutorial but I stumbled upon a "Upgrade stopped due to error" in LG flash tool.
I retried 3 or 4 times but with no luck. I verified that the ROM was correct for my model and it was. European and all...
I tried LGUP but my phone is unknown ( at least it's detected)...
I read some posts and told myself "I probably have messed up something, let's try it again with a fresh thing"... I clicked on the factory reset button and carried on.
There the phone booted on TWRP (That i didn't know existed before this). As I explored the menus with a TWRP google search on the computer, I began to realize that the factory reset was maybe a bad thing to do with a custom rom. I tried to reboot but I always end up booting on TWRP.
I re-tried to flash in download mode, but with always the "Upgrade stopped due to error".
I also tried to flash directly from TWRP a stock rom. Didn't work.
I was beginning to lose it and tried to flash the CM14 version I had before, juste to have a working phone again, but even this didn't work... I'm stuck with a TWRP phone
I need some help there...

FamousCarpet said:
Hello to all of you,
Thanks in advance for any help you can provide.
I bought second hand a LG G4 H815 with CyanogenMod 14 already installed on it.
Everything was fine until I installed my Ebanking apps, that would not function with an unlocked bootloader. I needed to return to a clean factory safe state...
It was the second time I flashed a rom in my whole life, the first one was a Galaxy S plus years ago.
I followed all the instructions for the KDZ flash in this tutorial but I stumbled upon a "Upgrade stopped due to error" in LG flash tool.
I retried 3 or 4 times but with no luck. I verified that the ROM was correct for my model and it was. European and all...
I tried LGUP but my phone is unknown ( at least it's detected)...
I read some posts and told myself "I probably have messed up something, let's try it again with a fresh thing"... I clicked on the factory reset button and carried on.
There the phone booted on TWRP (That i didn't know existed before this). As I explored the menus with a TWRP google search on the computer, I began to realize that the factory reset was maybe a bad thing to do with a custom rom. I tried to reboot but I always end up booting on TWRP.
I re-tried to flash in download mode, but with always the "Upgrade stopped due to error".
I also tried to flash directly from TWRP a stock rom. Didn't work.
I was beginning to lose it and tried to flash the CM14 version I had before, juste to have a working phone again, but even this didn't work... I'm stuck with a TWRP phone
I need some help there...
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Click to collapse
uninstall any drive for g4 from pc and reinstall again and lgup. now reboot phone to download mode when lgup is open first check upgrade opsion and when open kdz check refurbish opsion and start. good luck

Thank you for your answer
Still no luck
Uninstalled drivers
Rebooted PC
Reinstalled the drivers
Still unknown device

The best way to flash stock image is to use official LG Bridge app. Download it, turn off your phone, connect it to PC while holding volume up button - phone will go into download mode. Then there is option for software restore in LG Bridge but i won't tell u where exactly. If it won't work i would try on another PC. If it won't work maybe you would be able to flash stock image trough send_command but i won't help you with it.

FamousCarpet said:
Thank you for your answer
Still no luck
Uninstalled drivers
Rebooted PC
Reinstalled the drivers
Still unknown device
Click to expand...
Click to collapse
open lgup torn off the phone press volume up insert usb cable wait to see download mode on phone release up button and see if everything go fine

Thank you a lot Avantu, the LG Bridge did the trick! I now have a factory rom!