Develop Bugs

Marshmallow update caused bootloop

Hi all,
Just got news of the marshmallow being available to my LG G4 (H815). I was aware of the update having been rolled out to Poland and Korea before so I thought it was a safe bet.
I plugged in my phone, started the LG Bridge software which prompted me with the update. I went on and downloaded it, which happened without any issues.
However, when the process was over and my phone restarted, it went through the usual "app optimization" window and after that started boot-looping. I have the initial audio cue from LG playing every few minutes, with the same "app optimization" for 12 apps (when the first time it was around 90).
I initially left it for a while (5-10min) before i started losing patience. I removed the battery but that didn't change anything.
I initiated the Recovery mode, but it prompted me with a "factory reset" question, which I didn't feel like doing before having tried anything else.
My phone is not rooted and was running Android 5.1, the LG variant. I never fiddled with this phone.
Has anyone else experienced issues updating? Do you have any suggestions on what I can do to recover my data? Because for me, that's mostly what I'm concerned of.
Thanks!
Edit: In addition, I'm facing a new problem... while boot-looping, my phone is actually draining more energy from the battery than my charger can provide (yet, it's a 1,8A @ 5V).
It's now down to 10%, which I've been able to verify by removing the battery thus shutting down the phone, putting the battery back inside, and plugging the phone in while being off. However, this automatically turns on the phone, so it briefly displays the battery charging animation before booting... My phone was at 100% during the Marshmallow update.

Which S/N (serial number on your box) do you have? 505 and 506 are known for this issues..

appileh said:
Which S/N (serial number on your box) do you have? 505 and 506 are known for this issues..
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Wow, wasn't aware of that... it turns out it's a 505...

Wh!teSh4dow said:
Wow, wasn't aware of that... it turns out it's a 505...
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Click to collapse
yes it can be a issue of the 505.. Not to scare you or anybody else (there are people here that are crying and closing threads because i talk things like this.) But 505 is a known issue that some of the motherboards have defects. I hope you can fix it for yourself or call the cheap manufacturer LG..

appileh said:
yes it can be a issue of the 505.. Not to scare you or anybody else (there are people here that are crying and closing threads because i talk things like this.) But 505 is a known issue that some of the motherboards have defects. I hope you can fix it for yourself or call the cheap manufacturer LG..
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Are you aware of this being a reason for replacement units to be issued? I didn't buy it through LG directly but through amazon, so I'll get in touch with them, but just wanted to know if you've had any experience or know of anything regarding this. And thanks for letting me know.

Wh!teSh4dow said:
Are you aware of this being a reason for replacement units to be issued? I didn't buy it through LG directly but through amazon, so I'll get in touch with them, but just wanted to know if you've had any experience or know of anything regarding this. And thanks for letting me know.
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Np chief. They will fix your phone, just say it is in a bootloop after LG's official update. Call Amazon or LG itself to fixe this problem. (you mentioned you didnt root anything etc so you are good to go boss).

appileh said:
Np chief. They will fix your phone, just say it is in a bootloop after LG's official update. Call Amazon or LG itself to fixe this problem. (you mentioned you didnt root anything etc so you are good to go boss).
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Click to collapse
I figured, they would just try to restore my device and send it back to me, so I tried it and it worked. I'm still disapointed for two reasons:
- I still lost valuable data which I can't retrieve any more
- I'm still stuck with my device which could very well be prone to other issues in the future (any future update ?)

There are issues with this phone because i had 3 Rma's because of motherboard and dead pixels. My wife has also dead pixel and has version 506. Just use your phone, Marshmallow update is out so maybe they changed something in the system to stabilize the motherboard.
Verstuurd vanaf mijn LG-D855 met Tapatalk

Screen ghosting LG G4

Hey guys,
Yesterday I noticed some screen ghosting on my LG g4 on the top right where the battery icon, signal status etc are. I turned it off for 6 hours and noticed it got slightly better then i used an app which stimulates all the pixels on the screen for about 8 hours by flashing different colours. After this all ghosting went away but after i used my phone for about 2 minutes it made a new ghost. Please help me fix this permanently. I am currently using the same app with the intention of keeping it on for a full day.

It can't be fixed. However you could replace screen.

krater1212 said:
It can't be fixed. However you could replace screen.
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Are you sure that there is no other way? I don't want to send it for repair and am hoping that there is another solution.

bozy09 said:
Are you sure that there is no other way? I don't want to send it for repair and am hoping that there is another solution.
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No other solution mate.
You got to learn to live with it or to swap the screen.
I got it too. Doesn't bother me anymore.
I will upgrade after couple months but god knows i would not buy LG.....

chaki- said:
No other solution mate.
You got to learn to live with it or to swap the screen.
I got it too. Doesn't bother me anymore.
I will upgrade after couple months but god knows i would not buy LG.....
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Honestly LG has given me the worst android experience to date. Had the damn phone for 3 months an it was the taiwanese g4 which has no way to unlock its bootloader. The worst part is that the screen ghosting came up on the same day i decided to sell it and buy a oneplus 3 instead. Now i wont be able to sell it for a good price and that means i can't afford the oneplus. Never buying from LG again.

bozy09 said:
Honestly LG has given me the worst android experience to date. Had the damn phone for 3 months an it was the taiwanese g4 which has no way to unlock its bootloader. The worst part is that the screen ghosting came up on the same day i decided to sell it and buy a oneplus 3 instead. Now i wont be able to sell it for a good price and that means i can't afford the oneplus. Never buying from LG again.
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I understand exactly what you mean.

i have it also and it's ANNOYING as hell!!! I returned mine 2 weeks ago not only because of this but also because i cannot see nor connect to a 5 GHz Wi-Fi network.
Just 2 months prior top this the phone killed itself (not even 1 year old) and had to get a new PCB. LG if you are reading this, i want my money back.
Note to the people, please don't buy LG crap!

LG G4 bootloop
The bootloop - problem on all the LG phones from the main series is caused due to a less safety check in fabric and causes cause the processor releases from the mainboard during heat, mechanical load etc and the connections were broken! To fix, the processor have to pushed back on the mainboard with heat - I think a hair dryer is a good way to do that
If there are any other problems with the CPU itself - I don't know but sometimes the processor itself can be partially damaged
I've even a G4 which has stoped working on June.04.'17 and I'll try to apply this step in a professional environment. (you've to fully open it, put a hair dryer on the processor, heat the processor and push it down on the mainboard) The best video on yt to do that: search for "LG G4 BOOTLOOP FIX REPAIR VIDEO"
>>By holding the vol+ -key and plug in the USB-cable it bootet once... ..and works... ..but then heats up! - That might work for quick saving data on the PC!<<
I hope that could help!
contact (lang. EN/DE):
Telegram: @NA0341
mail: [email protected] (subject: G4 bootloop)
Best wishes
NA0341

Need help!! LG G4(H815) not starting

Hi all,
so here is my problem.
Day before yesterday i had a perfectly working LG g4 H815 model with s/n 511 running on firmware v20h, when i decided to root it and install some mods.
so i flashed TWRP, installed xposed and xtrememusic mod. the phone booted normally after installing these. i didn't install any modules under xposed. the phone worked perfectly for two days. however today morning it hanged while taking photo with the camera app. when restarting it got stuck at LG logo for long time. My brother(who doesn't have any technical knowledge) pulled out the battery and restarted. Again it got stuck at LG logo. thinking somthing wrong he again repeated this only to find that it didn't power on at all this time. No LG logo no notofication light nothing.
Tried charging it(although battery was aroung 60-70%), pressing power button removing the battery. still nothing. the phone is not at all powering up.
However when i connect it with USB cable with laptop, laptop makes sound of getting usb connection detected. i took it to a service centre.
the technical guy there told that IC may have been faulty. he told me that motherboard needs to be replaced. however unofficially he may try heating the IC to get it booting.
What should i do now? Is the IC really fried. had the rooting and installing mod caused it?
Please help.
PS- the phone is imported and cannot be sent back for warranty purpose.

I think you are experiencing the dreaded LG G4 bootloop. I don't think rooting or modding caused a software problem. It "may" have caused a hardware problem simply because it generated enough heat to loosen the IC that little bit that initiates the problems you are describing. I rooted and installed the stock image in Nov 2015. Two weeks ago the phone froze - restarted and then could not be booted. LG sent me a Fedex label and I sent it off. Ten days later I received the same phone back. I assume they replaced the mainboard.
You should contact LG directly. I saw a class action suit that was called off because it appeared that LG will fix this particular problem (failed mainboard) out of warranty. Anyone please correct me on this if I'm wrong.

dsteinschneider said:
I think you are experiencing the dreaded LG G4 bootloop. I don't think rooting or modding caused a software problem. It "may" have caused a hardware problem simply because it generated enough heat to loosen the IC that little bit that initiates the problems you are describing. I rooted and installed the stock image in Nov 2015. Two weeks ago the phone froze - restarted and then could not be booted. LG sent me a Fedex label and I sent it off. Ten days later I received the same phone back. I assume they replaced the mainboard.
You should contact LG directly. I saw a class action suit that was called off because it appeared that LG will fix this particular problem (failed mainboard) out of warranty. Anyone please correct me on this if I'm wrong.
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Hi thanks for the help.
But isn't the dreaded bootloop is that where the phone is stuck at the LG logo. Mine isn't booting at all. And the bootloop problem is due to big cores or such and not due to ic?

Mine wouldn't start at all - it bootlooped once for about a split second - then it was dead

Same is the problem with me. Bootlooped twice and then its completely dead. I have tried contacting Lg UK. Lets see what they say.

Ok so i got a reply from LG and they suggested me some steps to take (which are obviously not useful as it is completely dead). however they have also told me that they are willing to help me and asked me about details of purchase etc and "whether it was rooted".
so what should i reply rooted or not? will they detect it as it is dead.

dbzgoku said:
Ok so i got a reply from LG and they suggested me some steps to take (which are obviously not useful as it is completely dead). however they have also told me that they are willing to help me and asked me about details of purchase etc and "whether it was rooted".
so what should i reply rooted or not? will they detect it as it is dead.
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Click to collapse
Sorry to be late on reply. I advise to not answer question whether phone was rooted. Here is my reasoning:
1. This problem is widely occuring - only a tiny percentage of people root their phones therefore question is irrelevant.
2. The problem is known to be that an IC becomes loose most likely due to heat - a better question would be - do you place the phone on a hot dashboard with GPS running while you are charging?

dsteinschneider said:
Sorry to be late on reply. I advise to not answer question whether phone was rooted. Here is my reasoning:
1. This problem is widely occuring - only a tiny percentage of people root their phones therefore question is irrelevant.
2. The problem is known to be that an IC becomes loose most likely due to heat - a better question would be - do you place the phone on a hot dashboard with GPS running while you are charging?
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Click to collapse
thanks for the reply (although late). i have already sent the phone to LG replying as no root. Lets hope they repair it without any problems.
second i didnt do anything of anysort like placing on hot dashboard or such. one day while opening the camera app it decided to just hang and later on die on me.

I hope you didn't think I was saying you might have done something that would overheat your phone such as my second example. I was trying to come up with an example reason the IC loosens. Even if you did that the phone should survive such conditions. Let's hope the replacement motherboards somehow do better. My guess is that the soldering job is fine, the problem is probably bad design that doesn't "vent" the heat from chip.

dsteinschneider said:
I hope you didn't think I was saying you might have done something that would overheat your phone such as my second example. I was trying to come up with an example reason the IC loosens. Even if you did that the phone should survive such conditions. Let's hope the replacement motherboards somehow do better. My guess is that the soldering job is fine, the problem is probably bad design that doesn't "vent" the heat from chip.
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so what do you suggest after repair should i keep it or sell it? Lg g4 is no doubt the best phone when considering the value for money. no phone even twice in price comes close in camera and screen quality especially. but the unreliability of this phone has made me to consider selling it as soon as i get it back.

I'd keep it if your new board is high serial

lukem99626 said:
I'd keep it if your new board is high serial
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Well my old board was also high serial, beginning with 511

I'm going to take my chances - it's a great phone until it bootloops. I'm going to avoid scenarios best I can that could result in the phone heating up inside. That would be charging only if absolutely necessary while in my ProClip dash mount if the car is hot, using backup battery after depletion instead of charging more often etc. Thinking back I rarely put the phone into heat inducing situations - normal use results in the IC becoming loose at the 1 year mark. If mine bootloops exactly a year from now and LG fixes it again I'm an LG fan. If they blow me off no more LG.
I really regret not paying it off early and taking the $15/month deal for an S7 Edge last month

dbzgoku said:
Well my old board was also high serial, beginning with 511
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I mean like 611 ect thats what i got from lg

dsteinschneider said:
I'm going to take my chances - it's a great phone until it bootloops. I'm going to avoid scenarios best I can that could result in the phone heating up inside. That would be charging only if absolutely necessary while in my ProClip dash mount if the car is hot, using backup battery after depletion instead of charging more often etc. Thinking back I rarely put the phone into heat inducing situations - normal use results in the IC becoming loose at the 1 year mark. If mine bootloops exactly a year from now and LG fixes it again I'm an LG fan. If they blow me off no more LG.
I really regret not paying it off early and taking the $15/month deal for an S7 Edge last month
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Click to collapse
Well lg did mention in my communication with them that this carries 2 year warranty.

lukem99626 said:
I mean like 611 ect thats what i got from lg
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Didn't know that serials have gone so high

dbzgoku said:
Didn't know that serials have gone so high
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I brought a g4 in the new year sale it has the serial of 611 i had a 601 few months back i returned it ran hot and laggy the 611 one is cool running and lag free so i think something changed

My LG G3 D855 keeps restart (not bootloop)

i have my LG G3 D855 for about 1.5 year now. i had cyanogenmod for a year. Sometimes, i mean once at the month it has been crashing, you know lagging for 2 seconds and restarting but i had the same problem on diffrent phones so for me it was nothing. Last week it started to keeps restarting, i dont mean bootloop. It started to crushing. sometimes i could wright the PIN, sometimes it crushed when rebooting. i've changed software many times, did hard reset, even used flash tool to flash kdz of original version of my LG and its still being the same what should i do? Please guys halp me!

Sounds like a battery problem. Get a multi meter and test the battery voltage across the positive and negative terminals, it should be the battery's voltage rating to make the phone boot properly.

Orcam said:
Sounds like a battery problem. Get a multi meter and test the battery voltage across the positive and negative terminals, it should be the battery's voltage rating to make the phone boot properly.
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mine do bootloop and i measured the voltage it showed on two terminals 3.6 and on the other 3.98 so i guess its normal .. and i've tried flashing stock still no work and replaced battery and still no work any other ideas ?

Efarius said:
mine do bootloop and i measured the voltage it showed on two terminals 3.6 and on the other 3.98 so i guess its normal .. and i've tried flashing stock still no work and replaced battery and still no work any other ideas ?
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It's definitely a G3? Not a G4? Well I don't have any ideas actually sorry. Try get it into a different mode apart from system boot. Like recovery or download mode, and see what you can do with that.

niezgodek said:
i have my LG G3 D855 for about 1.5 year now. i had cyanogenmod for a year. Sometimes, i mean once at the month it has been crashing, you know lagging for 2 seconds and restarting but i had the same problem on diffrent phones so for me it was nothing. Last week it started to keeps restarting, i dont mean bootloop. It started to crushing. sometimes i could wright the PIN, sometimes it crushed when rebooting. i've changed software many times, did hard reset, even used flash tool to flash kdz of original version of my LG and its still being the same what should i do? Please guys halp me!
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Click to collapse
Try to put the brightness at 0
Mabye keep restart due to high temperature

I had a similar issue in this thread https://forum.xda-developers.com/lg-g3/help/lg-g3-freezing-restarting-staying-boot-t3513239 but my issue turned out to be hardware related as replacing the battery did not aid (probably logic board issue).

Same here.
Started happening with Android 5.
Upgrading to 6 didn't change a thing.
Replacing the battery to a new original one neither.
Resetting neither, removing or changing SIM or SD card... Looks like it's an internal HW problem

Orcam said:
It's definitely a G3? Not a G4? Well I don't have any ideas actually sorry. Try get it into a different mode apart from system boot. Like recovery or download mode, and see what you can do with that.
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I've tried download mode myself but it didn't last 2 min then it shut off completely.
---------- Post added at 05:50 PM ---------- Previous post was at 05:45 PM ----------
xenover said:
I had a similar issue in this thread https://forum.xda-developers.com/lg-g3/help/lg-g3-freezing-restarting-staying-boot-t3513239 but my issue turned out to be hardware related as replacing the battery did not aid (probably logic board issue).
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Click to collapse
did you take it to a repair shop and solved it or what ?

Efarius said:
did you take it to a repair shop and solved it or what ?
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I bought a new phone instead since my warranty was void already. The repair costs would probably have been ~ 200€ anyway (150€ for a motherboard + repair costs ~50€).

Orcam said:
Sounds like a battery problem. Get a multi meter and test the battery voltage across the positive and negative terminals, it should be the battery's voltage rating to make the phone boot properly.
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Click to collapse
Same thing continued for a year to me. I tried to fix by buying 2 generic batteries from china. Problem continued. I bought official LG battery and now phone works perfectly.

i have the same probleme in my lg g3 D850 i flash it with android 6 and 7 but no news its still reboot atself when i keep it off for 9hour and i turn it on its start normaly but after same time its reboot again i try 2 fake battery and no news i need a solution too :/ :/ :/ when he start i try calibration battery app and grenefy nothing work for thes probleme :/

Overheating

Hi everyone,
My LG G4 (H815) seems to be overheating quite alot when I'm playing games or running 'heavy' apps. I've already brought it back to the shop two times, they changed the motherboard, battery, all kinds of stuff..still the same problem. Sometimes it even gets to the point where it shuts itself off..
I was wondering if there is any Kernel or Rom or whatever that I can flash that will counter this problem somewhat.. There don't seem to be alot of people on this forum that have this problem although when I browse the internet it does seem to be a common issue..
Ps. My serial number starts with 6... so according to the internet it's only the ones that start with 5 that are *****..but yeah..
Anyways, looking forward to your responses.
Cheers.

The overheating with these phones is what caused our bootloop issue I believe and a host of other problems. Idk if anyone has a fix other then to possibly disable cores ?
Sent from my LG-H810 using Tapatalk

So basically there is no fix..either your phone overheats or it doesn't?