Develop Bugs

LG Flash Tool 2014 won't work

Tried cm12.1 but want to go back to stock.
I downloaded KDZ file and LG Flash Tool 2014, plugged the device (download mode)
When I start flashing, it says Connection to server failed
And if I retry, it continue for 3% and says "Upgrade stopped due to an error."
The model is D855 (2GB RAM)

Solved
Got it working now.
Reinstalled drivers, doesn't work
Changed USB port, doesn't work
Tried running as administrator, doesn't work
Changed KDZ file to V10l, WORKED!!!!!!

paphonb said:
Got it working now.
Reinstalled drivers, doesn't work
Changed USB port, doesn't work
Tried running as administrator, doesn't work
Changed KDZ file to V10l, WORKED!!!!!!
Click to expand...
Click to collapse
Hi. I am facing the same problem but getting error at 3%. I have D855 singapore model.I tried to flash v21a.error at 2%. tried v10k.same error at 2%. What to do now??

krishna13 said:
Hi. I am facing the same problem but getting error at 3%. I have D855 singapore model.I tried to flash v21a.error at 2%. tried v10k.same error at 2%. What to do now??
Click to expand...
Click to collapse
try to use a different usb port.
you can try LGUP method :http://forum.xda-developers.com/showthread.php?t=2785089

twisted_twice said:
try to use a different usb port.
you can try LGUP method :http://forum.xda-developers.com/showthread.php?t=2785089
Click to expand...
Click to collapse
Thank u. But the new method is only to upgrade or downgrade from 5.0 to 6.0. But not for upgrading from 4.4 to 5.0. Then how should I use? for kdz method,he mentioned the same LG flashtool 2014 method. ?????

krishna13 said:
Thank u. But the new method is only to upgrade or downgrade from 5.0 to 6.0. But not for upgrading from 4.4 to 5.0. Then how should I use? for kdz method,he mentioned the same LG flashtool 2014 method. ?????
Click to expand...
Click to collapse
you are right. use the lg flash tools 2014.
have you selected CSE flash?
are you using the correct KDZ for your cell?
what OS are you using?
have you installed the LG drivers?
what about the cable?
I personally do a hard reset before flashing a kdz.
I just updated my phone from LP to MM using the LG flash tool without a problem.

twisted_twice said:
you are right. use the lg flash tools 2014.
have you selected CSE flash?
are you using the correct KDZ for your cell?
what OS are you using?
have you installed the LG drivers?
what about the cable?
I personally do a hard reset before flashing a kdz.
I just updated my phone from LP to MM using the LG flash tool without a problem.
Click to expand...
Click to collapse
yeah. i am selecting CSE flash only.
I am using correc kdz .
My lappy is running on windows 10 and my phone is on kitkat v10n
The cable is 100% perfect as i flashed my g pro few days ago with the same laptop and same cable.
and coming to hard reset, I am unable to reset the phone. Just now I noticed that after selecting reset I went into black screen and can see "Fast boot mode" at the extreme top left of my phone. I switched it on and it booted back. What might be the problem.?

krishna13 said:
yeah. i am selecting CSE flash only.
I am using correc kdz .
My lappy is running on windows 10 and my phone is on kitkat v10n
The cable is 100% perfect as i flashed my g pro few days ago with the same laptop and same cable.
and coming to hard reset, I am unable to reset the phone. Just now I noticed that after selecting reset I went into black screen and can see "Fast boot mode" at the extreme top left of my phone. I switched it on and it booted back. What might be the problem.?
Click to expand...
Click to collapse
windows 10? I'd use windows 7 or 8.
your problem is not the flashtool. search for some tutorials about how to fix fast boot mode.

[Q] My lg G4 STUCK ON DOWNLOAD MODE

my phone is not working

pilo99 said:
i think i accidently bricked my lg g4 ....now it is stuck on download mode , i tried to get to the stock recovery through the buttons ..volume down and power but it keep rebooting to download mode , plz any help will be appreciated
Click to expand...
Click to collapse
Have you pulled battery and turned back on?

pilo99 said:
i think i accidently bricked my lg g4 ....now it is stuck on download mode , i tried to get to the stock recovery through the buttons ..volume down and power but it keep rebooting to download mode , plz any help will be appreciated
Click to expand...
Click to collapse
i did pull the battery and waited 30 second and it is the same thing it keep going to download mode

pilo99 said:
i think i accidently bricked my lg g4 ....now it is stuck on download mode , i tried to get to the stock recovery through the buttons ..volume down and power but it keep rebooting to download mode , plz any help will be appreciated
Click to expand...
Click to collapse
more info is better than none, what did you do to "accidentally brick" your phone? and if you are stuck in download mode you could try the lg mobile support tool and re load the rom for your device.

zPacKRat said:
more info is better than none, what did you do to "accidentally brick" your phone? and if you are stuck in download mode you could try the lg mobile support tool and re load the rom for your device.
Click to expand...
Click to collapse
Thanks a lot , i dont think there is a room yet for lg g4 tmobile i looked every where for the kdz and tot file ...

pilo99 said:
Thanks a lot , i dont think there is a room yet for lg g4 tmobile i looked every where for the kdz and tot file ...
Click to expand...
Click to collapse
READ completely, including the link in 4 before starting!!!
download the tool using the lg d851, under t-mobile. the tool is generic, and can be found at lg.com under support/downloads
1. install LG Mobile Support Tool
2. run Tool, it will query lg for updates and do so if needed.
3. Install USB Driver (dismiss if you have done so already)
4. follow this process: http://forum.xda-developers.com/showpost.php?p=51268802&postcount=21 (use 5. below to put into download mode, not vol up and down like the link states)
5. with your device off, hold the volume up button while plugging in your USB cable with the Tool open.
6 you system will recognize the device and configure drivers, this will take a minute.
7. continue following the link in 4.

I ran into the same problem and now i'm stuck in downloadmode!
Does this method work? Or is there any other fix yet?
Thanks in advance!

schwederino said:
I ran into the same problem and now i'm stuck in downloadmode!
Does this method work? Or is there any other fix yet?
Thanks in advance!
Click to expand...
Click to collapse
no i did not fix mine yet i am on tmobile am not sure if they will consider return am still within retun policy

hey guys, don't ask for a different fix if you don't bother to explain how your phone got stuck in download mode. as for does this work? Why don't you try, it's the same tool used to upgrade firmwares instead of using OTA, and the link included shows how to get the tool to download the file (if it sees the same/current f/w it does not download the firmware) and you have nothing to loose, and this method is often used to recover from "soft bricking" your phone.

i was restoring my LG G3 to stock through the lg flash tool .....when i got through with it and restore was succesfull. somehow i forget the usb cable plugged through my pc usb port ...then connected my lg g4 that is where the flash tool got my Lg g4 on Downloade mode ....i tried all the methodes somehow i think the recovery is messed up .....i can get to the recovery through the button but it reboot straight to the download mode ....thanks every one for their support

pilo99 said:
i was restoring my LG G3 to stock through the lg flash tool .....when i got through with it and restore was succesfull. somehow i forget the usb cable plugged through my pc usb port ...then connected my lg g4 that is where the flash tool got my Lg g4 on Downloade mode ....i tried all the methodes somehow i think the recovery is messed up .....i can get to the recovery through the button but it reboot straight to the download mode ....thanks every one for their support
Click to expand...
Click to collapse
did you try what I listed earlier?

Yesi did every step and it does not seemto help.. Thanks again...

Yes i followed all the steps including reinstalling drivers and the lg mobile for the D851

Good luck, if you did the kdz there is the LG flash tool

zPacKRat said:
Good luck, if you did the kdz there is the LG flash tool
Click to expand...
Click to collapse
When did the kdz come out? You have link for this?

MicroMod777 said:
When did the kdz come out? You have link for this?
Click to expand...
Click to collapse
don't think it's out yet, however my statement was somewhat incoherent. I meant to say if he had the kdz, he could use the flash tool to recover his phone.

zPacKRat said:
don't think it's out yet, however my statement was somewhat incoherent. I meant to say if he had the kdz, he could use the flash tool to recover his phone.
Click to expand...
Click to collapse
Yea, at this point there no way to fix this without a kdz that I know of.
Call LG and tell them you need the kdz to restore your G4.

i was lucky, i had flashed twrp before my phone soft brick..
Sent from my unlocked and rooted LG-H815

I got an LG G4 which is stuck on lg screen. When I put it in download mode, it shows download mode for a few seconds and restarts. I was trying to flash ZVB over ZVD and it ended up like this. Model is ls991 . Any help would be really appreciated!

Anyone got any idea? The whole thing started with getting rid of the Genisys rom ... I did not like it ... I thought I was going to bring it back to the stock, but then LG Up wrote an unkown device ... I thought it was flash with lg bridge ... that's what I lost. .. has removed recovery and has stopped updating at 16% ... since then it is only download mode I tried to update but failed with all three programs ... LG up to start - unkown device, LG bridge stop at 16% , LG Falsh Tool 9% ... sorry for my english

Random Reboots and Bootloops

I flashed 30c firmware with flashtool 2014 over rooted 21a (i think) on my D855 from Greece. I selected the normal flash to keep my files and apps, phone mode: DIAG and didn't clear the update registry. Phone worked normal for a week and then went into a boot loop. The phone randomly restarts and goes into loops for a while and then snaps out of it.
I have tried the following and none have fixed the issue:
-Replaced the battery.
-Upgraded to 30f over lg pc suite hoping it would fix it but it didn't.
-Flashed 30c and 30f over LG Flash tool with CS_EMERGENCY mode and cleared the updated registry.
-LG Flash tool wont flash any older lollipop kdz I tried. The phone screen flashes once but stays at 0% and then I receive a phone disconnected message.
-Put the device into safe mode and used the option on lg pc suite to fix upgrade errors. Didn't fix anything lol
-Tried factory reset. Nothing happened after I selected the yes on the confirmation.
-Tried to use LGUP hoping to install a lollipop kdz but it gives me an error message that I have to select a known model. Restarting the app and the phone didn't work either.
-Tried a guide on how to unroot and return to stock with the kitkat .tot file .
I really have no idea what else to try. Any help would be greatly appreciated.

louster35 said:
I flashed 30c firmware with flashtool 2014 over rooted 21a (i think) on my D855 from Greece. I selected the normal flash to keep my files and apps, phone mode: DIAG and didn't clear the update registry. Phone worked normal for a week and then went into a boot loop. The phone randomly restarts and goes into loops for a while and then snaps out of it.
I have tried the following and none have fixed the issue:
-Replaced the battery.
-Upgraded to 30f over lg pc suite hoping it would fix it but it didn't.
-Flashed 30c and 30f over LG Flash tool with CS_EMERGENCY mode and cleared the updated registry.
-LG Flash tool wont flash any older lollipop kdz I tried. The phone screen flashes once but stays at 0% and then I receive a phone disconnected message.
-Put the device into safe mode and used the option on lg pc suite to fix upgrade errors. Didn't fix anything lol
-Tried factory reset. Nothing happened after I selected the yes on the confirmation.
-Tried to use LGUP hoping to install a lollipop kdz but it gives me an error message that I have to select a known model. Restarting the app and the phone didn't work either.
-Tried a guide on how to unroot and return to stock with the kitkat .tot file .
I really have no idea what else to try. Any help would be greatly appreciated.
Click to expand...
Click to collapse
Replace the battery

I have the same problem and i got into the problem for the same reason.... the random rebooting that everyone says is down to the battery is something more sinister... i have tried 4 different batterys that work perfectly and it still happened i flashed a kdz and now i have a bootloop and no OS none of the other kdz files work neither do the tot files and lgup doesnt recognise my device... stuck...

Anik49 said:
Replace the battery
Click to expand...
Click to collapse
That's the first thing I tried on my list of failed attempts to fix the problem as you can see... Brand new battery. No change.
DjCaprio tried 4 different batteries as you can see.
This is just terrible!

louster35 said:
That's the first thing I tried on my list of failed attempts to fix the problem as you can see... Brand new battery. No change.
DjCaprio tried 4 different batteries as you can see.
This is just terrible!
Click to expand...
Click to collapse
http://forum.xda-developers.com/lg-...to-lp-using-lg-t3283912/post64597779......try to use this for flashing lolipop kdz...see what happen.

Anik49 said:
http://forum.xda-developers.com/lg-...to-lp-using-lg-t3283912/post64597779......try to use this for flashing lolipop kdz...see what happen.
Click to expand...
Click to collapse
I tried removing the battery while connected to the pc via usb already. The other trick that involves editing a file requires root.
My phone started flashing the blue screen of death today so I finally took it to LG so they can check it out. Either way thanks for trying to help.

Autorec Bricked my phone, need help

Hi everyone,
It's been some time since I last came here.
I am facing a problem in my LG G3 and was wondering if anyone here can help me.
My phone is D855 was on V21A, Global ROM, rooted. I was thinking about updating to 6.0, so I used Autorec to flash TWRP to backup everything before the update. After Autorec I used terminal emulator (as I always do) to reboot into recovery. And then, the phone kinda died. The screen is always black, no LED blink nothing.
When I connect the phone to the PC it gets recognized as AndroidNet USB port.
I look through the forums for solution and came across this:
http://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359
I opened up the phone and did the short-wire and my phone got recognized as Qualcom 9008. I used the tool named: BoardDiag and it could copy stuff to my phone.
However, the issue that I faced was that I could not locate the TOT file of V21A. I tried the TOT of V10E and it did not work.
I tried following the method of LGExtract tool to turn the KDZ file to TOT but that did not work either. What happened is that the tool turn the KDZ to CAB and then when I try to extract the CAB it says that it is corrupted. Tried another KDZ from another source and the same result.
What I need now is one of two things:
Either the TOT file of Global V21a
or a working method for KDZ to TOT conversion.
Thanks for any suggestions.
[UPDATE]
I tried renaming the KDZ to TOT but it could not be extracted to the right MBN files.

I am facing the same problem with my LG G3 D850. I flashed a D851 Variant version of the rom and after fixing the hard brick part i am stuck flashing the .tot file because its considering my phone as D851 model. I tried to flash the LGUP_8974.dll to try to fix it and nothing.

Dr.Alani said:
Hi everyone,
It's been some time since I last came here.
I am facing a problem in my LG G3 and was wondering if anyone here can help me.
My phone is D855 was on V21A, Global ROM, rooted. I was thinking about updating to 6.0, so I used Autorec to flash TWRP to backup everything before the update. After Autorec I used terminal emulator (as I always do) to reboot into recovery. And then, the phone kinda died. The screen is always black, no LED blink nothing.
When I connect the phone to the PC it gets recognized as AndroidNet USB port.
I look through the forums for solution and came across this:
http://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359
I opened up the phone and did the short-wire and my phone got recognized as Qualcom 9008. I used the tool named: BoardDiag and it could copy stuff to my phone.
However, the issue that I faced was that I could not locate the TOT file of V21A. I tried the TOT of V10E and it did not work.
I tried following the method of LGExtract tool to turn the KDZ file to TOT but that did not work either. What happened is that the tool turn the KDZ to CAB and then when I try to extract the CAB it says that it is corrupted. Tried another KDZ from another source and the same result.
What I need now is one of two things:
Either the TOT file of Global V21a
or a working method for KDZ to TOT conversion.
Thanks for any suggestions.
[UPDATE]
I tried renaming the KDZ to TOT but it could not be extracted to the right MBN files.
Click to expand...
Click to collapse
Same problem here.
did you find a solution????
Please HELP
.....

I used the same short-wire method and flashed the only TOT I could find, which was 10E. However, this time I flashed the system partition as well. In the guide it says it would take a long time so don't do it. I did it anyway. It took reeeeeeeeeaaaaalllllly long time. Over 4 hours.
After finishing flashing I place back the battery as indicated in the guide and the phone restarted and was stuck at LG screen. I connected it to the computer and it was finally recognized as an LG Android phone.
Then I used the official LG update tool. It detected the phone and said there was an update. I proceeded with the update and everything went back to normal. I even had the same data and apps because I did not overwrite the data partition.
I hope this helps.
Sent from my LG-D855 using XDA-Developers mobile app

Dr.Alani said:
I used the same short-wire method and flashed the only TOT I could find, which was 10E. However, this time I flashed the system partition as well. In the guide it says it would take a long time so don't do it. I did it anyway. It took reeeeeeeeeaaaaalllllly long time. Over 4 hours.
After finishing flashing I place back the battery as indicated in the guide and the phone restarted and was stuck at LG screen. I connected it to the computer and it was finally recognized as an LG Android phone.
Then I used the official LG update tool. It detected the phone and said there was an update. I proceeded with the update and everything went back to normal. I even had the same data and apps because I did not overwrite the data partition.
I hope this helps.
Sent from my LG-D855 using XDA-Developers mobile app
Click to expand...
Click to collapse
Thank you,
This is very helpful for me and all V21A owners.
Thaaaaaaaaaaanks.

LoRd4LoL said:
Thank you,
This is very helpful for me and all V21A owners.
Thaaaaaaaaaaanks.
Click to expand...
Click to collapse
I also short wired. Now I am looking for a TOT file. I had stock lollipop for lg g3 canadian version (d852) but i cannot find the tot file for lollipop. I have tot files for marshmallow and kitkat. Will that work?
I am downloading a lollipop 20g kdz file. Not sure if it will work. Plz help. Thanks.

LG G4 H815 bricked only download mode available

I just bricked my g4 by flashing a kdz but then the kdz fdailed and after rebooting the phone it was only able and was immediately going ( after the lg logo) to the download mode/ firmware upgrade. It was not recognizable by LGUP. I added some dll files to help fix that LGUP issue but i dont know if its working because by g4 cannot be detected by LGUP. Going in recovery to factory reset and selecting Yes 2 times only freezes the phone.

constatinus said:
I just bricked my g4 by flashing a kdz but then the kdz fdailed and after rebooting the phone it was only able and was immediately going ( after the lg logo) to the download mode/ firmware upgrade. It was not recognizable by LGUP. I added some dll files to help fix that LGUP issue but i dont know if its working because by g4 cannot be detected by LGUP. Going in recovery to factory reset and selecting Yes 2 times only freezes the phone.
Click to expand...
Click to collapse
Solved by changing the COM port in Device manager, but now i face the error 0x2000 even with the 2 DLLs in C:\Program Files (x86)\LG Electronics\LGUP\model\8994

constatinus said:
Solved by changing the COM port in Device manager, but now i face the error 0x2000 even with the 2 DLLs in C:\Program Files (x86)\LG Electronics\LGUP\model\8994
Click to expand...
Click to collapse
The process stops at 11% at PrimaryGPT with the phone showing no signs of upgrade ( exept the green com port ) - 0%
The phone has (or at least had) v29A polish nougat rom

constatinus said:
The process stops at 11% at PrimaryGPT with the phone showing no signs of upgrade ( exept the green com port ) - 0%
The phone has (or at least had) v29A polish nougat rom
Click to expand...
Click to collapse
https://forum.xda-developers.com/showpost.php?p=73642302&postcount=4
use v20p KDZ for downgrade.

the_naxhoo said:
https://forum.xda-developers.com/showpost.php?p=73642302&postcount=4
use v20p KDZ for downgrade.
Click to expand...
Click to collapse
Thanks VERY much! It worked

the_naxhoo said:
https://forum.xda-developers.com/sho...02&postcount=4
use v20p KDZ for downgrade.
Click to expand...
Click to collapse
I have exactly the same problem. I can flash v20p KDZ, but reboot still failed (stuck at LG logo).
Then I enter download mode, I can flash v29a tot polish nougat rom , but reboot still failed.
I notice that the LED is not flashing at LG logo screen.
Is there any other way to try?
Thanks

alaskaboy said:
I have exactly the same problem. I can flash v20p KDZ, but reboot still failed (stuck at LG logo).
Then I enter download mode, I can flash v29a tot polish nougat rom , but reboot still failed.
I notice that the LED is not flashing at LG logo screen.
Is there any other way to try?
Thanks
Click to expand...
Click to collapse
You're sure that you wait long enough? You check how the process is running on the phone "flash status bar" while flashing in download mode screen?
You try to boot on recovery and factory reset?

I waited for 5 minutes.
The flash process completed 100% successfully.
I tried to boot in recovery and confirm ‘yes’ twice, but nothing happen.
If I flash android 5.1 and flash LG’s MSM big core disable tool tot, it can boot successfully.
So I guess my main board may have problem.
Now I need to see if there is an DIY way to fix this.