Develop Bugs

LG G3 Bootloop in Download mode Stock ROM

Hi,
First of all, I had a bootloop problem couple of months back but it was fixed by a battery change. I had rooted my phone and then put the stock rom by using LG Flashtool. The Software now is Android 6.0 MM
Last week my phone randomly died on me while I was taking a picture. The battery percentage was 82 and yet it was bootlooping.
I got a new battery and the boot looping hasnt stopped. I tried to do LG Flash tool and LG UP and LG Suite but my phone turns off after a couple of seconds in download mode. I tried Factory reset by using the volume down button but it turns off when the android man appears. Now it even stopped showing percentage while I charge the phone.
I really think its software problem but I am not able to do anything to the damn thing. PLEASE HELP ME! :crying: I am running on a S2 and that thing is grandpa generation!

This maybe related to a hardware issue take it to a reputable technician u already said it was related to battery ... A swollen battery could have damaged ur g3 internals

jinderation said:
This maybe related to a hardware issue take it to a reputable technician u already said it was related to battery ... A swollen battery could have damaged ur g3 internals
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The battery wasnt swollen before. It was just not working. But Ill will be giving the phone to technician. Thanks for you reply

i've been blue screen'd D:

on saturday my phone suddenly shut off and shows no signs of life except the lg logo and then a blue screen sometimes. can anyone confirm the whole "putting the mainboard in the oven" thing to actually work? and if yes, how exactly should i do it?

Quote100 said:
on saturday my phone suddenly shut off and shows no signs of life except the lg logo and then a blue screen sometimes. can anyone confirm the whole "putting the mainboard in the oven" thing to actually work? and if yes, how exactly should i do it?
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That sounds a little extreme TBH with you. I've only heard of people doing the oven trick for the flickering LCD fix, but I haven't paid too much attention lately so I could be wrong.
Please provide more info:
d850 rt? still on fulmics? can you manually boot into recovery(doubt it if you're blue screened but had to ask)? have you tried flashing a TOT or KDZ and going back to stock yet?

startswithPendswithOOH said:
That sounds a little extreme TBH with you. I've only heard of people doing the oven trick for the flickering LCD fix, but I haven't paid too much attention lately so I could be wrong.
Please provide more info:
d850 rt? still on fulmics? can you manually boot into recovery(doubt it if you're blue screened but had to ask)? have you tried flashing a TOT or KDZ and going back to stock yet?
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yes d850 and yes i am still on fulmics but according to numerous other threads on different forums, this isn't a software issue. I can't get into download mode at all as the phone shows no signs of life when the power button is pressed or when its plugged in

Board expired
Quote100 said:
yes d850 and yes i am still on fulmics but according to numerous other threads on different forums, this isn't a software issue. I can't get into download mode at all as the phone shows no signs of life when the power button is pressed or when its plugged in
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It's time to move on.same happened to me a week ago.and I found the reason that my charger was at fault .the charger damaged one of the ics.it causes the board to draw a lot of current and causing severe heating issue within seconds.
So,better buy a new phone.

Quote100 said:
yes d850 and yes i am still on fulmics but according to numerous other threads on different forums, this isn't a software issue. I can't get into download mode at all as the phone shows no signs of life when the power button is pressed or when its plugged in
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Welp...that doesn't sound good. One last question(i think you already answered, but double checking)- so with power off, plugging the usb cable into a pc & holding vol up does nothing at all?
I guess if you're in "last resort mode" the oven may be the way to go, but I have not done it myself so I can't help much there. Here's a post from someone who had success using the oven... http://forum.xda-developers.com/showpost.php?p=68235296&postcount=7
I'd be nervous and would do it as the absolute last resort, but you could be at the "what do I have to lose, so why not?" point by now. You may want to PM the poster(or anyone else who has had success) for more info if you need it & to see if it is a lasting fix or not.
Good luck! :fingers-crossed:

startswithPendswithOOH said:
Welp...that doesn't sound good. One last question(i think you already answered, but double checking)- so with power off, plugging the usb cable into a pc & holding vol up does nothing at all?
I guess if you're in "last resort mode" the oven may be the way to go, but I have not done it myself so I can't help much there. Here's a post from someone who had success using the oven... http://forum.xda-developers.com/showpost.php?p=68235296&postcount=7
I'd be nervous and would do it as the absolute last resort, but you could be at the "what do I have to lose, so why not?" point by now. You may want to PM the poster(or anyone else who has had success) for more info if you need it & to see if it is a lasting fix or not.
Good luck! :fingers-crossed:
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I also ventured for the oven.and within 2 seconds.my board was gone...oven trick is just a sarcasm.don't go for it.
You can extra life of 30 minutes by giving it a Sunbath for some time.

My bad - misquoted a poster.

I kind of forgot about this thread whoops
Well I have news for you guys, I got a used g3 from eBay and wanted my apps from my old phone back and you know what I did?
I stuck it into the oven. I **** you not, after 375 for 5 minutes it started working again and I was able to get my apps and data to an SD card. Its still working but I took the battery out of it to use with the replacement. Can't believe it worked tbh

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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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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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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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

Lg G3 constant shutdown

Hey there im turning to the community for a bit of help...
First of all here is my phone info... Bone stock non-rooted
Lg G3 D-852 canadian version with Bell
Running android 6.0 kernel 3.4.0
Build number mra58k soft version d85230h
here is my issue, lately when i do random things on the phone it shuts itself down and goes into a bootloop.
in order to get the phone back on i actually have to plug it in and for some reason seems to short it back out of loop and into boot.
At first when it started it was booting up completely then shutting down 4 times. after that 4th time everything was good.
now it just stays stuck in a look until i shove a wire up its hole.
ive come to notice that most times whe it shuts down it seems to be when i try to do many things at once or load up a video...
sometimes even opening a picture will shut it down... it almost feels like when an overclocked system just ticks off.
im not quite sure where to go from here, phone is 2 years old but id love to figure this problem out
edit: yes i already tried a factory reset
edit 2: i just tried another factory reset.... now it wont even load up. itll boot all the way to the os (if plugged in) then shuts down and just says its charging... completely out of a phone now ffs

Its battery related problem.
Pls check your battery

matuszp said:
Its battery related problem.
Pls check your battery
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what should i need to check on my battery? terminals? voltage?

Morngkilr said:
what should i need to check on my battery? terminals? voltage?
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just change it, battery is a known problem for this behaviour

Snoob25 said:
just change it, battery is a known problem for this behaviour
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perhaps ill try a friend's battery to see if it stops this behaviour before ordering a 40$ battery

Yes, try it and let us know later

Morngkilr said:
perhaps ill try a friend's battery to see if it stops this behaviour before ordering a 40$ battery
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Try an Anker battery, worked perfect on 2 G3's I had, while both the stock batteries bootlooped.

rowlin said:
Try an Anker battery, worked perfect on 2 G3's I had, while both the stock batteries bootlooped.
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im almost happy to hear its not an isolated bootlooping problem lol
sorry for your battery as well but heck ill give it all a try

well sunofagun.... i poped the new battery in and she booted right away like nothing ever happenned.....
have i ever told anyone i love the community thank you so much everyone

Very common. Batteries usually last a little less than 2 years for these then you need to get a new one. Thank God these have removable batteries.

i remember i had once gotten a new battery for my sgs2 but it was crap lol

I'm having problems with my screen, it gets dark and I do not know why, it can be without disturbing half an hour or maybe an hour, please someone who tells me why this may be this fault, I'm in MarshMallow

Phone is stuck in something like a bootloop

Hey guys,
I'm having some serious trouble with my LG G3... I'm running the latest update for stock and now all of a sudden I'm stuck in something like a bootloop.
Sometimes it reaches the SIM PIN screen and then reboots, but most of the time it doesn't even make it there.
The last time I got to the PIN screen I could record a log (the last part of it is attached).
Can anyone see what's wrong from the log?
Ah, btw I have TWRP installed.
Best regards,
Arma

Hi there,
Same issue here, hope to find an answer!

I returned to stock and the problem still exists.

How old is the phone?
Did the bootloop occur out of nothing, or was it right after you updated?

engmia said:
How old is the phone?
Did the bootloop occur out of nothing, or was it right after you updated?
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It started as a reboot only when I opened google maps and then at some point it restarted constantly.
I had the system running for quite a while. The phone is now about 9 months old.

armagaddon said:
It started as a reboot only when I opened google maps and then at some point it restarted constantly.
I had the system running for quite a while. The phone is now about 9 months old.
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Did you get it new or second hand?
It's quite possible that unfortunately you got the bootloop issue that's caused by overheating the motherboard.
There are fix guides around the forum, you should add a thermal pad to the SoC chip.

engmia said:
Did you get it new or second hand?
It's quite possible that unfortunately you got the bootloop issue that's caused by overheating the motherboard.
There are fix guides around the forum, you should add a thermal pad to the SoC chip.
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It was new, but overheating sounds possible because it got quite hot many times without any reason.

armagaddon said:
It was new, but overheating sounds possible because it got quite hot many times without any reason.
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Well maybe the phone was refurbished or you were really unlucky. Maybe the issue is somewhere else, but this bootlooping is quite common with the G3 and some other LG phones (just look at the threads around the forum) and it's a hardware issue. It has the symptoms just like the ones you're describing, so I'm fairly certain that's the problem.

Try another battery. Use geniune battery.
And if did no help then heat soc with hair drier and add thermal pad or somthing thin from metal.

hello,
I had this problem in the past, you could fix it with a hairdrayer and a thermal pad. After that, install a linageos ( because it's lite and much rapid than stock), then downclock your CPU to 1 GHz and your GPU to 200 MHz.
This should fix your problem for a while ( 2 to 3 weaks ) and repet the same manipulations until the smartphone dies.
https://forum.xda-developers.com/lg-g3/general/ill-buy-lg-smartphones-t3524127
I suggest to launch a boycott campaign against LG,
Because they know that their smartphones have this problem but they sell them even as. I lost 200$ on a g3 and 450 on a V20 !