Develop Bugs

HELP needed! G4 Bootloop!!

Hello guys!
It all started today in the morning when I opened Instagram application on my G4 (H815 model) and suddenly the phone froze. After 15 or 20 seconds it tried to reboot itself but it went straight into bootloop. It's not acctually a bootloop. It tries to go past loading screen and reboots another time and after that all I can see is LG logo.
I tried to enter recovery mode. No success. I tried updating/flashing KDZ file with LG Flash Tool and I got error everytime saying there was not enough information....
Last thing I tried was to boot into download mode. It shows Firmware Update screen but I don't thing ADB is working. I tried command adb devices and it found nothing.
I'm so desperate now as I need phone tomorrow. I hope it's not hard-bricked. Do any of you have idea what to do?
Any help apprechiated
TIA
Nejc

NejcSterle said:
Hello guys!
It all started today in the morning when I opened Instagram application on my G4 (H815 model) and suddenly the phone froze. After 15 or 20 seconds it tried to reboot itself but it went straight into bootloop. It's not acctually a bootloop. It tries to go past loading screen and reboots another time and after that all I can see is LG logo.
I tried to enter recovery mode. No success. I tried updating/flashing KDZ file with LG Flash Tool and I got error everytime saying there was not enough information....
Last thing I tried was to boot into download mode. It shows Firmware Update screen but I don't thing ADB is working. I tried command adb devices and it found nothing.
I'm so desperate now as I need phone tomorrow. I hope it's not hard-bricked. Do any of you have idea what to do?
Any help apprechiated
TIA
Nejc
Click to expand...
Click to collapse
you phone is dead. and must be sent to LG for repair or your retailer.. you got the famous bootloop issue. alot of people have it.. whats you first 3 digits of serial number ?

raptorddd said:
you phone is dead. and must be sent to LG for repair or your retailer.. you got the famous bootloop issue. alot of people have it.. whats you first 3 digits of serial number ?
Click to expand...
Click to collapse
are you sure it's dead???
Cause, OMG!
I can't be without phone. Is there any other way?
And BTW, I have unlocked bootloader, so no warranty for me
Why do I need first 3 digits of serial number?

NejcSterle said:
are you sure it's dead???
Cause, OMG!
I can't be without phone. Is there any other way?
And BTW, I have unlocked bootloader, so no warranty for me
Why do I need first 3 digits of serial number?
Click to expand...
Click to collapse
lots of people report bottloops theres a thread and i said about 80% suffers from it.. its a hardware problem from lg .
thers the flash kdz to disable big core ,phone will be slow but usable.. and some have reported that warranty was denied and some had luck and phone was fixed give it a try..
because the first phone are suppose to be more likely to suffer from it.. so to know if its old earlier phone. or new one . that soeant suppose to happen anymore but it still does..

raptorddd said:
lots of people report bottloops theres a thread and i said about 80% suffers from it.. its a hardware problem from lg .
thers the flash kdz to disable big core ,phone will be slow but usable.. and some have reported that warranty was denied and some had luck and phone was fixed give it a try..
because the first phone are suppose to be more likely to suffer from it.. so to know if its old earlier phone. or new one . that soeant suppose to happen anymore but it still does..
Click to expand...
Click to collapse
Thanks for the info. I checked serial number on the box and it says 507. I know a lot of 505 has this issue.
Do you have a link to that thread to disable main cores? I can still sell working phone rather than bricked
And I'm so pissed now because I didn't do anything wrong. Damn LG! Life's not good anymore!!
Is there possibility to flash KDZ with other program than LG flash tool? I can't get it working, it always says it couldn't find right information...

NejcSterle said:
are you sure it's dead???
Cause, OMG!
I can't be without phone. Is there any other way?
And BTW, I have unlocked bootloader, so no warranty for me
Why do I need first 3 digits of serial number?
Click to expand...
Click to collapse
Mine has gone away for repair . and by the way I'm not sure if you've noticed but you are without the phone anyway if it doesn't work . lol

fridaycider said:
Mine has gone away for repair . and by the way I'm not sure if you've noticed but you are without the phone anyway if it doesn't work . lol
Click to expand...
Click to collapse
I want to fix it. This would probably be possible if LG flash tool worked. Do you have any suggestions? I really like this phone

NejcSterle said:
I want to fix it. This would probably be possible if LG flash tool worked. Do you have any suggestions? I really like this phone
Click to expand...
Click to collapse
I really wish I could help . I managed to do a factory reset and it lasted 5 mins . you could try the oven fix .

fridaycider said:
I really wish I could help . I managed to do a factory reset and it lasted 5 mins . you could try the oven fix .
Click to expand...
Click to collapse
well, i guess I'll have to buy new phone. I'm a little disappointed with LG for this issue. Anyway, thanks for all of the useful posts. Thread can be locked now

Yes it's LG issue, but if you had not unlocked the bootloader , you would still have warranty. They will be fix this without problem
Wysłane z mojego LG-H815 przy użyciu Tapatalka

NejcSterle said:
Do you have a link to that thread to disable main cores? I can still sell working phone rather than bricked
Click to expand...
Click to collapse
https://m.reddit.com/r/lgg4/comment..._guide/?utm_source=mweb_redirect&compact=true

NejcSterle said:
well, i guess I'll have to buy new phone. I'm a little disappointed with LG for this issue. Anyway, thanks for all of the useful posts. Thread can be locked now
Click to expand...
Click to collapse
Give it a shot to try to get it fixed.. some had with unlocked bootloader.. someone already posted the KDZ that disables big cores..

mine is 603, anybody knows if it could have the problem?
Inviato dal mio LG-H815 utilizzando Tapatalk

nic85 said:
mine is 603, anybody knows if it could have the problem?
Inviato dal mio LG-H815 utilizzando Tapatalk
Click to expand...
Click to collapse
well only time will tell most will do .its just a matter of time.. since they are new and the ones getting bootloops are older.. so they say it takes about 8-9 months to show.. will need to wait and see. in 10 months from manufacturing date.
you cant tell wich one will but, LG says they fixed the issue in new phones..

Here is the video tutorial: https://www.youtube.com/watch?v=lbJXwPmbXFc

raptorddd said:
well only time will tell most will do .its just a matter of time.. since they are new and the ones getting bootloops are older.. so they say it takes about 8-9 months to show.. will need to wait and see. in 10 months from manufacturing date.
you cant tell wich one will but, LG says they fixed the issue in new phones..
Click to expand...
Click to collapse
thanks, bought a Galaxy s7 edge tho
Inviato dal mio LG-H815 utilizzando Tapatalk

NejcSterle said:
Hello guys!
It all started today in the morning when I opened Instagram application on my G4 (H815 model) and suddenly the phone froze. After 15 or 20 seconds it tried to reboot itself but it went straight into bootloop. It's not acctually a bootloop. It tries to go past loading screen and reboots another time and after that all I can see is LG logo.
I tried to enter recovery mode. No success. I tried updating/flashing KDZ file with LG Flash Tool and I got error everytime saying there was not enough information....
Last thing I tried was to boot into download mode. It shows Firmware Update screen but I don't thing ADB is working. I tried command adb devices and it found nothing.
I'm so desperate now as I need phone tomorrow. I hope it's not hard-bricked. Do any of you have idea what to do?
Any help apprechiated
TIA
Nejc
Click to expand...
Click to collapse
Have you tried flash your KDZ file with LGUP software? http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803

InterCity92 said:
Have you tried flash your KDZ file with LGUP software? http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
Click to expand...
Click to collapse
Yes, I tried everything. I've sent LG G4 for repair with unlocked bootloader, they replaced it without problems. I was without phone for 16 days though. It's working now, but I have some WiFi issues (slow download speeds)
[CAN LOCK THREAD NOW]

raptorddd said:
well only time will tell most will do .its just a matter of time.. since they are new and the ones getting bootloops are older.. so they say it takes about 8-9 months to show.. will need to wait and see. in 10 months from manufacturing date.
you cant tell wich one will but, LG says they fixed the issue in new phones..
Click to expand...
Click to collapse
They are 100% lying almost every other phone is being bootloop .. Hey guys dont buy new phone buy refurbished phones instead..
Sent from my LG-H815 using XDA-Developers mobile app

Phone stuck on LG start up

Hi, I have cynogen installed and all was working fine until this morning, noticed my phone appeared to be booting up, gets to the blue circle then goes black and goes back to the LG screen, then repeats. Ive never been able to get into recovery by pressing the power and vol button and have tried numerous times with no joy. I know i can boot into recovery using ADB but the phones needs to be on doesnt it? Is there any other way that I can do this? Please help been with out my phone all day! Feel lost lol

foxguard said:
Hi, I have cynogen installed and all was working fine until this morning, noticed my phone appeared to be booting up, gets to the blue circle then goes black and goes back to the LG screen, then repeats. Ive never been able to get into recovery by pressing the power and vol button and have tried numerous times with no joy. I know i can boot into recovery using ADB but the phones needs to be on doesnt it? Is there any other way that I can do this? Please help been with out my phone all day! Feel lost lol
Click to expand...
Click to collapse
you could do 2 things.. one download KDZ use LGUP flash it and see if it was software related or something went wrong at flash.. if it keeps doing it then it has the bootloop issue.. and need to be sent back for repair....can you provide your first 3 digits of your serial number...?

raptorddd said:
you could do 2 things.. one download KDZ use LGUP flash it and see if it was software related or something went wrong at flash.. if it keeps doing it then it has the bootloop issue.. and need to be sent back for repair....can you provide your first 3 digits of your serial number...?
Click to expand...
Click to collapse
Thank you, will look at this kdz, is it simple to use?
it has been working fine on cynogen for last few months, nor changed anything
s/n is 508

foxguard said:
Thank you, will look at this kdz, is it simple to use?
it has been working fine on cynogen for last few months, nor changed anything
s/n is 508
Click to expand...
Click to collapse
yes it is its pretty easy... . file is big though... download kdz for you variant.. what android you are using.? MM or were you on stock LP.?
well i think since your phone is from 2015 august. that bootloop was supposed to be fixed by then. but newer phone are still getting hit by the bootloop.. but be aware unlocking the bootloader voids warranty.. some been lucky that phone were repaired some were denied repair..

raptorddd said:
yes it is its pretty easy... . file is big though... download kdz for you variant.. what android you are using.? MM or were you on stock LP.?
well i think since your phone is from 2015 august. that bootloop was supposed to be fixed by then. but newer phone are still getting hit by the bootloop.. but be aware unlocking the bootloader voids warranty.. some been lucky that phone were repaired some were denied repair..
Click to expand...
Click to collapse
Its been unlocked for ages and running the cyanogen rom, this is what is now stuck but was running fine. lg website doesnt have the programme any more, will hunt for it. so this will work even though phone doesnt boot?

foxguard said:
Its been unlocked for ages and running the cyanogen rom, this is what is now stuck but was running fine. lg website doesnt have the programme any more, will hunt for it. so this will work even though phone doesnt boot?
Click to expand...
Click to collapse
her it is..
http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
here are the links but i think you got the BOOTLOOP problem that many been affected..
NO ...... the only way for your phone to boot and gather all data is to flash a moddedKDZ.. but am not sure if it works on your variant..
if you have warranty send it back...but if they find out its unlocked they may deny repair.. you must pay for it...
this will make it boot but it will make it slow. as it disables the main cores...
https://www.reddit.com/r/lgg4/comments/45gfg2/dae_g4_series_msm_big_core_disable_tool_guide/
read this post..
http://forum.xda-developers.com/g4/help/lg-g4-stuck-bootloop-t3268734

raptorddd said:
her it is..
http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
here are the links but i think you got the BOOTLOOP problem that many been affected..
NO ...... the only way for your phone to boot and gather all data is to flash a moddedKDZ.. but am not sure if it works on your variant..
if you have warranty send it back...but if they find out its unlocked they may deny repair.. you must pay for it...
this will make it boot but it will make it slow. as it disables the main cores...
https://www.reddit.com/r/lgg4/comments/45gfg2/dae_g4_series_msm_big_core_disable_tool_guide/
read this post..
http://forum.xda-developers.com/g4/help/lg-g4-stuck-bootloop-t3268734
Click to expand...
Click to collapse
Going to give this a whirl now mate, thanks.

LG G3 S D722 is hard bricked and I really need help.

My G3 is stuck on the booting screen and nothing works. I can't go to recovery menu. But I can hear my notifications, no calls though.
I tried to root my G3 using kingroot then replacing it with SuperSU. I restarted the phone after just to see if it's ok then this happened. It wouldn't start up. It just shows the "LG: life's good" thing and doesn't do anything else. I can't even go to recovery or download menu.
Now soon I am going to send it for repair. There is important stuff in my phone though such as pictures, text messages, my gmail and other accounts.
Will they be able to see it if they manage to repair my phone? a relative told me that I erased my android operating system..
Hopefully someone will help me here.

I'm no expert regarding phones with LG ROMs, but you might have had a locked bootloader. If i remember correctly, my old G2 needed its bootloader unlocked before doing any fancy stuff. I now have a G3 and i'm terrified to do anything to it. (After some nasty Soft & Hard bricks on my G2)
Can you explain better what you mean by "replacing Kingroot with SuperSU". Did you have both installed at the same time or what? Some people had problems with Kingroot that it would lose root after you reboot it (G3)
You say you can hear notifications, how can you hear them if you're not booting the OS? You said it's stuck at LG logo.

Mashed_Potatoes said:
I'm no expert regarding phones with LG ROMs, but you might have had a locked bootloader. If i remember correctly, my old G2 needed its bootloader unlocked before doing any fancy stuff. I now have a G3 and i'm terrified to do anything to it. (After some nasty Soft & Hard bricks on my G2)
Can you explain better what you mean by "replacing Kingroot with SuperSU". Did you have both installed at the same time or what? Some people had problems with Kingroot that it would lose root after you reboot it (G3)
You say you can hear notifications, how can you hear them if you're not booting the OS? You said it's stuck at LG logo.
Click to expand...
Click to collapse
Ok I managed to get to the factory reset screen by holding the power and volume down button. I confirmed it, it said "Factory reset processing" then "erasing.." with the android logo for like 2 seconds, then it disappears and goes back to the boot loop.

space_atlas said:
Ok I managed to get to the factory reset screen by holding the power and volume down button. I confirmed it, it said "Factory reset processing" then "erasing.." with the android logo for like 2 seconds, then it disappears and goes back to the boot loop.
Click to expand...
Click to collapse
Go from start -> get to download mode -> flash stock kdz and restart with the rooting and stuff

bender_007 said:
Go from start -> get to download mode -> flash stock kdz and restart with the rooting and stuff
Click to expand...
Click to collapse
I'm in download mode with the USB connected to my PC. it says "Firmware update" and has been sitting at 0% for very long.

Of course. See the guide from hyelton about getting back to stock on lg g2 and g3. Get your kdz gor d722 and flash it via lg flash tool 2014 (or use lg mobile support tool and let it do it automatically)
Sent from my SM-G930F using Tapatalk

bender_007 said:
Of course. See the guide from hyelton about getting back to stock on lg g2 and g3. Get your kdz gor d722 and flash it via lg flash tool 2014 (or use lg mobile support tool and let it do it automatically)
Sent from my SM-G930F using Tapatalk
Click to expand...
Click to collapse
I looked in this link http://storagecow.eu/index.php?dir=Xda/LG+G3/Stock/
There isn't D722 here? Sorry for all the questions..

space_atlas said:
I looked in this link http://storagecow.eu/index.php?dir=Xda/LG+G3/Stock/
There isn't D722 here? Sorry for all the questions..
Click to expand...
Click to collapse
Try this
or here you can browse

bender_007 said:
Try this
or here you can browse
Click to expand...
Click to collapse
I followed the steps and it now works! Thank you very much! I'm getting a Galaxy S6 soon

No problem
Sent from my SM-G930F using Tapatalk

Bootloop, soft or hard?

Hi,
I've got H815 stuck on LG logo. I've tried flashing stock fw, the I've tried the LG Bridge way, all of them completed but still stuck. Then I've tried the hard reset but no luck. Is this hardware issue then?

ojcu said:
Hi,
I've got H815 stuck on LG logo. I've tried flashing stock fw, the I've tried the LG Bridge way, all of them completed but still stuck. Then I've tried the hard reset but no luck. Is this hardware issue then?
Click to expand...
Click to collapse
Flash stock fw with lg up https://www.technobuzz.net/download-lgup-tool/

jason_l367 said:
Flash stock fw with lg up https://www.technobuzz.net/download-lgup-tool/
Click to expand...
Click to collapse
I've tried that already. Flashing goes well, but then it's still stuck on LG logo. Another thing, when I leave the phone without the battery for night, then in the morning it boots up up to optimizing apps, blue led flashes but then goes back bootloop. Some people here recommend lgup with different dll files and particular fw but I don't know if there's a point.

Yea I unbricked my bootlooped H815T with thiskdz give it a try..

I got this phone second hand and the guy said he was trying to downgrade fw, after which the bootloop happened. Is it possible that it's just the anti-rollback and not the faulty motherboard? How to make sure?
My phone is in the freezer now and we'll see how it goes...

jason_l367 said:
Yea I unbricked my bootlooped H815T with thiskdz give it a try..
Click to expand...
Click to collapse
I've just tried that, no luck. Phone still shows LG logo...

ojcu said:
I got this phone second hand and the guy said he was trying to downgrade fw, after which the bootloop happened. Is it possible that it's just the anti-rollback and not the faulty motherboard? How to make sure?
My phone is in the freezer now and we'll see how it goes...
Click to expand...
Click to collapse
Have you tried the 29a nougat beta? Sorry dude I've unbricked my G4 a lot of times with flashtool and lgup, but never had your encounter

jason_l367 said:
Have you tried the 29a nougat beta? Sorry dude I've unbricked my G4 a lot of times with flashtool and lgup, but never had your encounter
Click to expand...
Click to collapse
I've just tried something that definitely prooves that's hardware issue. I've disabled big cores using that guide and phone works now. It's just single core though. You can make images to run on 4 cores but it's only temporary solution and I'm afraid the phone may die at any time. I think I'm gonna do the return but the guy is not really happy to do that.

Maybe try to unlock the bootloader and flash twrp. It's what I would do.
Best of luck

It is unlocked. I'm just gonna return the phone. Guy sold it as having a software issue, but disabling big cores proved it's an infamous LG ilapo. It can run on 4 cores, there are guides how to do it, but you can never be sure when it dies completely. Thanks for help anyway.

Impossible flash any rom

Hi All
After a bootloop experience and ILAPO fix I managed to start the g4 disabling 2 big cores recovered everything almost, then I made the mistake to update it again.
The phone is stuck again and when in download mode if I try to flash a rom it stops at 12% rebooting Always. I think some partitions are messed up, do you suggest to erase partitions and reflash them from backupped ones? If yes which command?
I thank you in advance for your superb availability and kindness , you are a north pole for this community.
My LG is a G4 H818p , the ilapo rom was 20e, then updated into 20h stock, no mod, no unlock tried, the phone is recognised by lg flash and salt.
Thanks to anyone can help and I know steadfasterx will be one of most thanked for his experience.
Cheers guys

Pete_Mitchell said:
Hi All
After a bootloop experience and ILAPO fix I managed to start the g4 disabling 2 big cores recovered everything almost, then I made the mistake to update it again.
The phone is stuck again and when in download mode if I try to flash a rom it stops at 12% rebooting Always. I think some partitions are messed up, do you suggest to erase partitions and reflash them from backupped ones? If yes which command?
I thank you in advance for your superb availability and kindness , you are a north pole for this community.
My LG is a G4 H818p , the ilapo rom was 20e, then updated into 20h stock, no mod, no unlock tried, the phone is recognised by lg flash and salt.
Thanks to anyone can help and I know steadfasterx will be one of most thanked for his experience.
Cheers guys
Click to expand...
Click to collapse
No guarantees but you can try flashing that ilapo fix with LG up:
http://leech.binbash.it:8008/unbricking/max4cores/Marshmallow/H818P/
Sent from my OnePlus 6T using XDA Labs

steadfasterX said:
No guarantees but you can try flashing that ilapo fix with LG up:
http://leech.binbash.it:8008/unbricking/max4cores/Marshmallow/H818P/
Sent from my OnePlus 6T using XDA Labs
Click to expand...
Click to collapse
I tried but everytime the phone reboot arrived at that
exact percentage and obviously once it reboot itself is not in downloading mode...
Thanks

Pete_Mitchell said:
I tried but everytime the phone reboot arrived at that
exact percentage and obviously once it reboot itself is not in downloading mode...
Thanks
Click to expand...
Click to collapse
1) so you were successful on flashing these files?
2) you may try the ILAPO fix list from my signature but there is not many hope for your device in the current state. doesn't hurt to try anyways though
.-

steadfasterX said:
1) so you were successful on flashing these files?
2) you may try the ILAPO fix list from my signature but there is not many hope for your device in the current state. doesn't hurt to try anyways though
.-
Click to expand...
Click to collapse
I managed to flash the file you linked, the phone rebooted, for few secs I saw the little android robot and then nothing blue led indicator blinking as when it boots and lg logo...but not constantly autoreboot as usual.
Any other idea? What if I format partitions and after I use salt to flash the backup? Is it something possible?

Pete_Mitchell said:
I managed to flash the file you linked, the phone rebooted, for few secs I saw the little android robot and then nothing blue led indicator blinking as when it boots and lg logo...but not constantly autoreboot as usual.
Any other idea? What if I format partitions and after I use salt to flash the backup? Is it something possible?
Click to expand...
Click to collapse
you cannot fix the ILAPO with software. Flashing the ILAPO files is just to extend the life not to let it live forever.
I guess the time of your mainboard is over. buy a new one or send it to trash or (as said) try the ILAPO fixes like hand dryer, oven etc..
.-