Develop Bugs

Recover on from bootloop on H815 EU

Hi guys,
Yesterday I got sweaty hand palms.
My EU 815 G4 is unlocked, the official way, and I had rooted it.
Then I tried to install xposed from twrp and I did something wrong, and ended up in bootloop...
I have just updated to v20b before, and forgot to connect the phone to the PC, and allow the PC debug access before installing xposed, so i could see the phone in ADB mode, but couldn't access it.
Of course I hadn't made a backup before this - I like to cry
Just as a desperate try, when everything else had failed, i thought about using the new tool provided by shakeyabooti LG UP to flash the factory KDZ all over
I put the phone in SW. update mode by:
1. Turning off the phone
2. connecting USB cable to the PC
3. Press and hold vol. up while connecting the USB cable to the phone
Then i downloaded the v20b KDZ file, provided by Autoprime (since this was what i where allready running)
Opened LG UP, loaded the H81520B_00.kdz, marked REFURBISH
Lastly i pressed "Start" and waited for about 15-20 minutes and "TADAAAA"
The phone where up and running again... only things lost where root and TWRP
- Sharing since I'm properly not the only one ending up in this kind of mess :laugh:

Just tried it no luck :/
So just to confirm...unlocking bootloader official way does void warranty and we can not send it in for repairs?

rakinisbat said:
Just tried it no luck :/
So just to confirm...unlocking bootloader official way does void warranty and we can not send it in for repairs?
Click to expand...
Click to collapse
Indeed. Maybe you'll find a cool employee at your vendor who will still do it, but your warranty is definately void and they don't need to do anything. Depends on how acommodating the employee is. If you're stuck in a bootloop @rakinisbat just follow the steps in this thread.
And please keep in mind that there's a way to get out of bootloops 99% of the time (in fact 100% if it's a software related problem), you just have to do a good search on xda. Furthermore there's an uninstaller app for xposed in the official rovo89 thread, which you can flash via recovery and it which undos the xposed installation and your phone will boot fine (if you can access TWRP - just flash it). If you have further questions you can PM me, always happy to help

Follow_and_Feel said:
Indeed. Maybe you'll find a cool employee at your vendor who will still do it, but your warranty is definately void and they don't need to do anything. Depends on how acommodating the employee is. If you're stuck in a bootloop @rakinisbat just follow the steps in this thread.
And please keep in mind that there's a way to get out of bootloops 99% of the time (in fact 100% if it's a software related problem), you just have to do a good search on xda. Furthermore there's an uninstaller app for xposed in the official rovo89 thread, which you can flash via recovery and it which undos the xposed installation and your phone will boot fine (if you can access TWRP - just flash it). If you have further questions you can PM me, always happy to help
Click to expand...
Click to collapse
Thanks Mate, I guess ill have to try my luck with LG,
I have that batch of H815 with the faulty motherboard, unfortunately I'm in that 1% *Sigh* :crying:
Tried literally everything i could with the software, pretty much confirmed it is the motherboard.
It looks like the KDZ is flashing properly, as LGUP shows whichever kdz i put on, but the actual hardware is not capable of booting into the OS.

rakinisbat said:
Thanks Mate, I guess ill have to try my luck with LG,
I have that batch of H815 with the faulty motherboard, unfortunately I'm in that 1% *Sigh* :crying:
Tried literally everything i could with the software, pretty much confirmed it is the motherboard.
It looks like the KDZ is flashing properly, as LGUP shows whichever kdz i put on, but the actual hardware is not capable of booting into the OS.
Click to expand...
Click to collapse
Ugh, okay that's bad luck. Sorry to hear. If it's a motherboard problem I can't help you unfortunately Sorry for that. What is exactly happening when you try to flash via LGUP? Just curious

Follow_and_Feel said:
Ugh, okay that's bad luck. Sorry to hear. If it's a motherboard problem I can't help you unfortunately Sorry for that. What is exactly happening when you try to flash via LGUP? Just curious
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Click to collapse
It flashed perfectly fine, once completed it reboots and just literally sits on the LG logo.....FOREVER or till the battery dies.
So much disappointment in LG

rakinisbat said:
It flashed perfectly fine, once completed it reboots and just literally sits on the LG logo.....FOREVER or till the battery dies.
So much disappointment in LG
Click to expand...
Click to collapse
Oh yeah that really sounds like a hardware problem. Damn it LG! But is your bootloader still locked? You might have a chance to get a new one if it is And if it's a hardware prob you still have your warranty, haven't you?

Follow_and_Feel said:
Oh yeah that really sounds like a hardware problem. Damn it LG! But is your bootloader still locked? You might have a chance to get a new one if it is And if it's a hardware prob you still have your warranty, haven't you?
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Click to collapse
Nope, my bootloader is unlocked, im a flash-a-holic, longest i have lasted without rooting or unlocking a bootloader is about 2 weeks. I would have never imagined such a massive hardware issue with a flagship phone. I'll probably get a nexus 6P atleast it has better support than a LG. I'm in Australia, I imported this phone when it was released, so i have to send this phone overseas if i want it repaired, which they will most likely deny.
Sooooo over LG now! There are like hundreds if not thousands that are effected they are not even acknowledging it or providing a viable solution.

rakinisbat said:
Nope, my bootloader is unlocked, im a flash-a-holic, longest i have lasted without rooting or unlocking a bootloader is about 2 weeks. I would have never imagined such a massive hardware issue with a flagship phone. I'll probably get a nexus 6P atleast it has better support than a LG. I'm in Australia, I imported this phone when it was released, so i have to send this phone overseas if i want it repaired, which they will most likely deny.
Sooooo over LG now! There are like hundreds if not thousands that are effected they are not even acknowledging it or providing a viable solution.
Click to expand...
Click to collapse
Haha! I can completely subscribe to the flash-a-holic :laugh: Well ok. So it's even worse than i thought Sorry for ya. At least you live on a continent everyone here desires to go to :laugh: Going to Australia is very popular in germany But sorry that you're experiencing trouble with your LG. Good luck with that nexus - it's an awesome phone, too. Bye bye

I've got the bootloop issue. Phone was turning on or not, just vibrating etc. I've dissassembled it, assembled again and it started working don't know why...Now I've flashed CM I was on Genisis ROM earlier maybe that was the issue

zwodziarz said:
I've got the bootloop issue. Phone was turning on or not, just vibrating etc. I've dissassembled it, assembled again and it started working don't know why...Now I've flashed CM I was on Genisis ROM earlier maybe that was the issue
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Click to collapse
Hi sir
I decide to buy lg g4.
If i flash cm ,bootloop not happend again?
Thank you

It doesn't matter what firmware you have got. Bootloop is happening because of hardware failure.
Odesláno z mého LG-H815 pomocí Tapatalk

LG G4 H815 Reboot Problem !?

Hello All,
I have LG G4 H815, after 6 month of use, the mobile reboot without reason (First freeze then reboot) ... "sometimes within two minutes, rebooted 10 times"
I try to change the battery from another device, The problem still exists
trying to install KDZ rom 6.0 V20C, same ...
What is the problem, and What are the proposed solutions

maen.safadi said:
Hello All,
I have LG G4 H815, after 6 month of use, the mobile reboot without reason (First freeze then reboot) ... "sometimes within two minutes, rebooted 10 times"
I try to change the battery from another device, The problem still exists
trying to install KDZ rom 6.0 V20C, same ...
What is the problem, and What are the proposed solutions
Click to expand...
Click to collapse
does it boot into android? thers the bootloop issue that only LG logo and reboots...you need to send to Lg for bootloop issue.. or maybe yours is about to get ILAPO bootloop problem

raptorddd said:
does it boot into android? thers the bootloop issue that only LG logo and reboots...you need to send to Lg for bootloop issue.. or maybe yours is about to get ILAPO bootloop problem
Click to expand...
Click to collapse
No bootloop, it pass android logo

maen.safadi said:
No bootloop, it pass android logo
Click to expand...
Click to collapse
flash stock KDZ and see if it still happens.

raptorddd said:
flash stock KDZ and see if it still happens.
Click to expand...
Click to collapse
flashed MM v20c, but still happens

maen.safadi said:
Hello All,
I have LG G4 H815, after 6 month of use, the mobile reboot without reason (First freeze then reboot) ... "sometimes within two minutes, rebooted 10 times"
I try to change the battery from another device, The problem still exists
trying to install KDZ rom 6.0 V20C, same ...
What is the problem, and What are the proposed solutions
Click to expand...
Click to collapse
You may have gotten yourself into the famous bootloop issue on ur device which is G4 famous for.. Its a hardware issue caused by seperation between the joints in the motherboard..if ur in warranty take it to LG if not prepared to spend atleast 200$ to fix it...there is a method also by disabling cores in which u have to be already in lollipop n flash certain firmware...so check these forums on how to disable the cores..also have u tried the cse flash in lg flashtool meaning complete stock try doing that too

jinderation said:
You may have gotten yourself into the famous bootloop issue on ur device which is G4 famous for.. Its a hardware issue caused by seperation between the joints in the motherboard..if ur in warranty take it to LG if not prepared to spend atleast 200$ to fix it...there is a method also by disabling cores in which u have to be already in lollipop n flash certain firmware...so check these forums on how to disable the cores..also have u tried the cse flash in lg flashtool meaning complete stock try doing that too
Click to expand...
Click to collapse
I sent it today to the LG, after checking it, They found that the problem from board
the problem with me that the device is not on warranty in my country , i bought it from shop (International)
LG Company is a big S**T (Conclusion)

maen.safadi said:
I sent it today to the LG, after checking it, They found that the problem from board
the problem with me that the device is not on warranty in my country , i bought it from shop (International)
LG Company is a big S**T (Conclusion)
Click to expand...
Click to collapse
Thats the problem with LG ... This is a factory issue thats why i mention on my thread why somebody has to take LG to court for making faulty phones in the first place

Help save a bricked lg g3

:crying:
My issues is quite complicated. Please be patient and read on.
Less than a week ago, I bought an LG G3 D855. It wasn't brand new and definitely out of warranty.
It was on the 4.4.2 Os version but I couldn't update it because I couldn't locate the UPDATE CENTER and after some research online, I found out it was because it was rooted. I couldn't find a Supersu application anywhere on the phone anyways but Root checker confirmed that it was rooted.
I downloaded the stock kitkat firmware in a .tot format and I tried flashing using LG Flash Tool for TOT but it failed because "Device version is different"
I checked the Imei online and it stated that the device is a Sprint LS990 but the details embedded in the phone all say it is D855
I checked online and found a couple of posts about this error and one user said he was able to fix it by flashing the actual Sprint .tot with the lg flash tool. I tried that but it didn't work. It still said "Device version is different. Check BIN or dll"
I checked online and found results pointing to a generic .dll file for G3s and I downloaded it but when I used it on the Flash tool, it resulted to an error "CrossDL blah blah"
So I found a Marshmallow kdz file. LGUP won't see my device model so I was able to flash it after editting the software in my build.prop to D85510n.
***I have always changed the port to COM41 in all the steps I used
The LG UP detected my model and it flashed to 100% but got stuck on a bootloop by loading the lg screen, freezing and restarting by it self. It never gets to the homescreen.
I downloaded lollipop kdz reflashed using LGUP in a form of downgrade and it got to 100% and got stuck at the lg screen while trying to reboot.
I redownloaded the stock kitkat rom and used the Lg flash tool but it failed. It said 'PID null IMEI Null"
I used LGUP to reflashed. It came to my understanding that the LGUP can flash both kdz and tot. So it flashed to 100% but got stuck at the lg screen and I have tried all I can but it is stuck. It can go into download tho. I don't know what to do about the IMEI. I don't know if the last flash retrieved it. I don't kniw what to do.
It no longer shows as LGE AndroidNet USB Serial
Please can anyone help me?
I just need my phone to work again. I was stubborn and now I regret it. I should have just stuck to kitkat. I'm so desperate to get my phone working that I wouldn't mind Android Froyo Os if it was ever possible.
PLEASE HELP!!!

Same problem here

RsGilbert said:
Same problem here
Click to expand...
Click to collapse
Hey. I got it fixed all by myself. Whatsapp me at +2348166225097 and I will help.

I own lg g3 d855
It boot until home screen but after a while black screen and it s hard to power on it again. Then need to wait a time to boot it again.
What the problem?
---------- Post added at 06:50 PM ---------- Previous post was at 06:46 PM ----------
Amlmx said:
I own lg g3 d855
It boot until home screen but after a while black screen and it s hard to power on it again. Then need to wait a time to boot it again.
What the problem?
Click to expand...
Click to collapse
Please anyone can help me?
Thanks

Thank you Litblogger
Litblogger said:
Hey. I got it fixed all by myself. Whatsapp me at +2348166225097 and I will help.
Click to expand...
Click to collapse
My thanks to Litblogger and xda. I got it fixed with your help on whatsapp, Litblogger. My phone is currently back to stock. I couldnt thank you again because the phone is now network locked. Maybe we could speak on facebook. My user name is Gilbert R Ssenyonjo.

RsGilbert said:
My thanks to Litblogger and xda. I got it fixed with your help on whatsapp, Litblogger. My phone is currently back to stock. I couldnt thank you again because the phone is now network locked. Maybe we could speak on facebook. My user name is Gilbert R Ssenyonjo.
Click to expand...
Click to collapse
Folks.
Got the same problem now (with my wife's phone). I'd appreciate it if instead of helping people privately you'd tell everyone what to do to fix the problem.

I had the same problem, downloaded .tot file via IMEI check (can't remember where from) and used that .tot file with BoardDiag, flashed everything as in tutorial (google it), it was 4.4.2 Android, couldn't update it (software is up to date) so I rooted it, flashed twrp 3.0.0 and installed Fulmics 8.0, it works now just fine

Lg g4 h811 hard bricked please help........

Hello everyone
so when i got my g4 h811 it was running 21y software but it was laggy a bit and i did mistake by flashing 20v kdz via lgup now its bricked no signs of life whatsoever no recovery no download mode no charging. ONLY SHOWS HS-QDLOADER 9008 DETECTED IN MY PC DEVICE MANAGER.
I was a samsung user from years and i have good knowledge about samsung devices but i am new for lg so i did tried h811 dump file write via win32 disk image to micro sdcard 64gb class 10 after formatting exfat fat32 etc but still no signs of life.
I even charged my battery to 1 of my friends g4 and battery is perfect 100% i really need help how to fix this thing all i need is download mode the rest i can fix by flashing latest kdz by lgup.
I even tried qpst qfil method to write files direct to emmc but it shows always error such as sahara fail device is not in firehose mode etc.
Desperately need help please tia.

anyone alive here to help ?
first and last time i buy lg product really screw you lg i mean this is ridiculous i just flashed stock kdz firmware via lgup and its hard bricked AND FUNNY THING BOTH KDZ FIRMWARE AND LGUP TOOL FROM OFFICIAL LG I MEAN HOW STUPID IS THAT.
IF THEY REALLY DONT WANT ANYONE TO DOWNGRADE LG CAN JUST BLOCK THE FLASHING PROCESS LIKE IN ODIN TOOL IN SAMSUNG "SECURE BOOT" .
i am really really frustrated from last 3 weeks i tried almost every single method to unbrick this thing but no signs of life.

Trex888 said:
anyone alive here to help ?
first and last time i buy lg product really screw you lg i mean this is ridiculous i just flashed stock kdz firmware via lgup and its hard bricked AND FUNNY THING BOTH KDZ FIRMWARE AND LGUP TOOL FROM OFFICIAL LG I MEAN HOW STUPID IS THAT.
IF THEY REALLY DONT WANT ANYONE TO DOWNGRADE LG CAN JUST BLOCK THE FLASHING PROCESS LIKE IN ODIN TOOL IN SAMSUNG "SECURE BOOT" .
.
Click to expand...
Click to collapse
Only help I can offer you is post it in the correct thread as this is for a sprint g5 There are guides in the reg g4 threads all over.Many post and threads pertaining to this.
I have requested from Lg mods to move this post to rite location. As you may get better answers there.
Please do not make new post.

Hello,
I have the same problem as you. Have you finally found a solution?

yan1982 said:
Hello,
I have the same problem as you. Have you finally found a solution?
Click to expand...
Click to collapse
no man i give up i tried from 3weeks all methods but no signs of any life at all
finally i gave to local repair center today to replace the emmc chip or entire motherboard . still i dont know how much it will cost if it will cost more then 40$ 50$ i will throw this piece of crap in garbage and say goodbye to lg forever and never ever recommend anyone i know to buy any lg crap product.
ONCE AGAIN SCREW YOU LG BIG TIME!!!!!
"LG" MEANS "LIFE"S GOOD" BUT IN MY OPINION LG MEANS "LIFE" GARBAGE" BECAUSE THEY JUST MADE MINE.

Trex888 said:
no man i give up i tried from 3weeks all methods but no signs of any life at all
finally i gave to local repair center today to replace the emmc chip or entire motherboard . still i dont know how much it will cost if it will cost more then 40$ 50$ i will throw this piece of crap in garbage and say goodbye to lg forever and never ever recommend anyone i know to buy any lg crap product.
ONCE AGAIN SCREW YOU LG BIG TIME!!!!!
"LG" MEANS "LIFE"S GOOD" BUT BUT IN MY OPINION LG MEANS "LIFE" GARBAGE" BECAUSE THEY MADE MINE.
Click to expand...
Click to collapse
Ok it's a shame. I do not even use this phone for two days. I'll see if the warranty can handle it. This is the second time that a LG brand phone deceives me as well. In any case never again this brand's phone.

Downgrade 7.0 to 6.0

Hello everyone, it's been many months since I'm using the official LG v29a beta ROM installed with the booloader locked with LGUP.
I would like to go back to Marshmallow how can I do? My G4 is Italian no brand.

Al3xCooki3 said:
Hello everyone, it's been many months since I'm using the official LG v29a beta ROM installed with the booloader locked with LGUP.
I would like to go back to Marshmallow how can I do? My G4 is Italian no brand.
Click to expand...
Click to collapse
Cazzo... did you try the search box?
Doesn't matter. If I already lost a minute writing that, I can also advise you...
Flash V20p.kdz with LGUP. Don't forget you need to use the right .dll for the phone to be recognized.
If you use the search box you'll find what you need.

RuedasLocas said:
Cazzo... did you try the search box?
Doesn't matter. If I already lost a minute writing that, I can also advise you...
Flash V20p.kdz with LGUP. Don't forget you need to use the right .dll for the phone to be recognized.
If you use the search box you'll find what you need.
Click to expand...
Click to collapse
Sorry but I do not sail much in this forum! How do I know which right dll to use?

Al3xCooki3 said:
Sorry but I do not sail much in this forum! How do I know which right dll to use?
Click to expand...
Click to collapse
I'll send you the files by PM otherwise this will become a long conversation.

RuedasLocas said:
I'll send you the files by PM otherwise this will become a long conversation.
Click to expand...
Click to collapse
Tank you

I have the same problem. I have updated my LG G4 to 7.0 beta. Now the problem for me is I can't able to boot into download mode it says "Your device is corrupt. It cannot be trusted and will not boot" phone is booting until lokscreen it freezes there and restart again.
My Lg G4 is from Taiwan. It doesn't allow to unlock bootloader. Any help much appriciated.

ronniem88 said:
I have the same problem. I have updated my LG G4 to 7.0 beta. Now the problem for me is I can't able to boot into download mode it says "Your device is corrupt. It cannot be trusted and will not boot" phone is booting until lokscreen it freezes there and restart again.
My Lg G4 is from Taiwan. It doesn't allow to unlock bootloader. Any help much appriciated.
Click to expand...
Click to collapse
Corrupted Bottloader is not the Thread. Power Button to Continue and Downloadmode starts!!!
for downgrade to MM use:
https://forum.xda-developers.com/showpost.php?p=73642302
Firmware is to search!!!

uweork said:
Corrupted Bottloader is not the Thread. Power Button to Continue and Downloadmode starts!!!
for downgrade to MM use:
https://forum.xda-developers.com/showpost.php?p=73642302
Firmware is to search!!!
Click to expand...
Click to collapse
Thank you for the reply but my phone is not booting in download mode at all

ronniem88 said:
Thank you for the reply but my phone is not booting in download mode at all
Click to expand...
Click to collapse
If you're stuck in LG logo boot up, just try to start LGUP (having the right files), connect the phone to a USB2 port and start the process.
Today, after try the RR ROM, I re-install v29a with TWRP but got stuck on the LG logo boot up, I just disconnected the phone from the computer, turned ON LGUP, connected the phone, was detected as it should and re-flash the v20p.kdz again. No problem... try it.
Can also see this: https://forum.xda-developers.com/showpost.php?p=76951541&postcount=30
Good luck.