Develop Bugs

[Q] Reboot when not charging.. :(

hey there, I own the Tmobile version of the lg g3, Never rooted it, never had any problems with it UNTIL YESTERDAY! My phone turns off when not plugged in a charger and then it will endlessly reboot itself.. i already factory reset it Twice and the repair mode on lg pc suite doesn't show up.. please help me, what do i need to do?

Fotis229 said:
hey there, I own the Tmobile version of the lg g3, Never rooted it, never had any problems with it UNTIL YESTERDAY! My phone turns off when not plugged in a charger and then it will endlessly reboot itself.. i already factory reset it Twice and the repair mode on lg pc suite doesn't show up.. please help me, what do i need to do?
Click to expand...
Click to collapse
Hi.
If you have tried the Hard Reset and it did not work then I have to ask you if you are still under shop or LG Warranty. If you are take it back.
It may seem obvious to you my reply but it is so. If you can return it you do not want a problematic phone right?
However:
If you do not have the Warranty any longer then your best and perhaps only solution is to flash with a computer <preferably windows 7> a KDZ or TOT+DLL file. This will flash the LG stock firmware back into your phone and eliminate this issue and make it like when it first came out of LG factory.
Be careful to READ and understand very well this process. YOU MUST choose the correct KDZ or TOT file for your model. If you flash the wrong file for your model...goodbye LG G3! Do not be in a hurry until you completely understand the whole process.
Below is a link to an XDA thread where you will find LOTS of help in doing this. The OP of this thread @hyelton is a really nice and helpful guy and has helped thousands of people. Just head over to the thread, first READ the OP and then post your questions and you will get help.
If you have no Warranty do this. Be patient and YOU WILL get your beloved G3 fixed.
http://forum.xda-developers.com/showthread.php?t=2785089
Good luck.

Fotis229 said:
hey there, I own the Tmobile version of the lg g3, Never rooted it, never had any problems with it UNTIL YESTERDAY! My phone turns off when not plugged in a charger and then it will endlessly reboot itself.. i already factory reset it Twice and the repair mode on lg pc suite doesn't show up.. please help me, what do i need to do?
Click to expand...
Click to collapse
hi there, t-mobile germany?
mine have exactly the same problems, I already contacted lg via mail.
any news on yours?!
edit: found this on an other thread: http://forum.xda-developers.com/showpost.php?p=60799772&postcount=1428

D855 stuck in ever lasting bootloop

So my mom's G3 started acting weird a couple weeks ago, it would randomly shut down but could be started without big problems. However yesterday it shut down and when we tried to restart it it became stuck in a bootloop. I've thought about hard reset but my mom has some pretty important stuff on it and prefers not to lose it. I've also thought about kdz flash but since I'm not sure about her phone's current firmware (i'm sure that it's lollipop, but I don't know which exact version) I can't do anything.
How can I solve this, or, at least, know which exact firmware is the phone running ?
By the way it's a 100% stock phone, no root no recovery, nothing.
Thanks in advance.

metamoq said:
So my mom's G3 started acting weird a couple weeks ago, it would randomly shut down but could be started without big problems. However yesterday it shut down and when we tried to restart it it became stuck in a bootloop. I've thought about hard reset but my mom has some pretty important stuff on it and prefers not to lose it. I've also thought about kdz flash but since I'm not sure about her phone's current firmware (i'm sure that it's lollipop, but I don't know which exact version) I can't do anything.
How can I solve this, or, at least, know which exact firmware is the phone running ?
By the way it's a 100% stock phone, no root no recovery, nothing.
Thanks in advance.
Click to expand...
Click to collapse
Many people has such problem mine one able to make it boot again by plugging in to a charger, still it will still reboot frequently, my friend fixed his by replacing motherboard while some others said it is related to battery

I've tried plugging in the charger but never thought of the battery.
I'll try switching batteries, thanks for advice.
UPDATE: I could get the phone on again by switching batteries, thanks a lot !
If I flash a new firmware can the old battery work again ?

metamoq said:
I've tried plugging in the charger but never thought of the battery.
I'll try switching batteries, thanks for advice.
UPDATE: I could get the phone on again by switching batteries, thanks a lot !
If I flash a new firmware can the old battery work again ?
Click to expand...
Click to collapse
I.don't think it is related to Rom as I am using stock MM

We're going to buy a new battery, hope this fixes it for good.
Thanks for your help.

[H815] Stuck on lg screen, no bootloop, access to download and recovery ok [SOLVED]

Hi,
I've searched over xda and google before but haven't found anything relevant so I've decided to post my own problem.
My G4 freezed unexpectedly while listening to music, I had to remove the battery to put it off.
But it never passed the LG logo again.
So, i've been stucked on this LG logo, looking for an answer and found about this hardware issue but I'm not certain to get the same error.
It's not a bootloop (even if I sometimes got stuck in bootloop while trying everything to revive my phone), I have been able to get to the download mode and TWRP (which I don't have anymore because I went back to stock using LGUP and LG bridge), even though I hardly get to the download mode now (I sometimes manage to do it though). I've also managed to save my data when I've managed to enter TWRP (plug in, remove battery, push volume down + power while putting battery in) which, people with hardware issue haven't, as far as I know.
I've tried everything I could and wouldn't even be able to describe it all.
Do you guys know how I could be sure if it's hardware or software related ?
Last try: update via Lg Bridge, succeed but still stuck on LG screen.
Thanks a lot !

Flash a lollipop kdz via LGUP, then try the ILAPO (works only with lollipop, no marshmellow) metod, there is a thread on xda.
There is a video on youtube too

alinnsts said:
Flash a lollipop kdz via LGUP, then try the ILAPO (works only with lollipop, no marshmellow) metod, there is a thread on xda.
There is a video on youtube too
Click to expand...
Click to collapse
Thanks, I'm going to try this and let you know !

I gave a look on what you've suggested, but is that going to let me use the phone or only backup ?
From what I understood (and I might be wrong), this only allows to backup because the phone would be worthless...

bbsugar said:
I gave a look on what you've suggested, but is that going to let me use the phone or only backup ?
From what I understood (and I might be wrong), this only allows to backup because the phone would be worthless...
Click to expand...
Click to collapse
You'll be abble to use the phone, but it would be slower duo to the fact that with ILAPO you disable the "2 more powerfull" cpu cores... this metod let only 1 core active from the other 4, if you want to use the other two you have to gain root permissions and install an .apk to reactive the other 3. It's a litle triky but better than nothing I guess ��
PS: if you dont want to deal with all this bulls**it send it to LG

Same problem
This morning my Lg G4 also got stuck in boot Lg screen. Did you manage to fix your issue or got the data backup ?

sometimes flashing stock LP firmware fix it.. sometimes you must send it back to LG for repair..

localgh0st said:
This morning my Lg G4 also got stuck in boot Lg screen. Did you manage to fix your issue or got the data backup ?
Click to expand...
Click to collapse
I managed to backup, it's a weird trick and you need to have TWRP installed I guess:
- Remove the battery
- Plug your phone (I used my laptop but I'm guessing it also work directly from the charger)
- Push volume down + power
- Insert battery holding those buttons
I managed to enter TWRP and backup with this.
It didn't work at first, I had to try it several times.
I also read you have to keep holding volume down + power until the phone reboot itself once, and then you get access to TWRP but I tried so many times differently I don't remember which one worked best. Anyway, it worked for me that way.
I didn't fix the issue and I sent it to LG... I'm so frustrated, it's been 10 years I'm into this stuff and I always managed to fix everything

Hi guys,
So my G4 just came back from LG, they replaced the motherboard and that's it... A bit disappointed to not having been able to fix it myself but at least, it worked.
I didn't have to pay anything since it was a hardware defect, LG took care of it.
Thanks for those who tried to help, I hope this post would be useful for some with the same issue.

bbsugar said:
Hi guys,
So my G4 just came back from LG, they replaced the motherboard and that's it... A bit disappointed to not having been able to fix it myself but at least, it worked.
I didn't have to pay anything since it was a hardware defect, LG took care of it.
Thanks for those who tried to help, I hope this post would be useful for some with the same issue.
Click to expand...
Click to collapse
I'm having this same issue out of the blue. Is your serial number one of the infamous "before 509" ones? I'm on TMo with the H811, so it may not be similar at all....but I'm at my wits end. I've never had a spontaneous boot loop happen to me before now. It was always something I'd done.

Dramatdude said:
I'm having this same issue out of the blue. Is your serial number one of the infamous "before 509" ones? I'm on TMo with the H811, so it may not be similar at all....but I'm at my wits end. I've never had a spontaneous boot loop happen to me before now. It was always something I'd done.
Click to expand...
Click to collapse
Indeed, my serial number was 505 something.
I've been there too, if it's spontaneous, it must be this hardware defect...

bbsugar said:
Indeed, my serial number was 505 something.
I've been there too, if it's spontaneous, it must be this hardware defect...
Click to expand...
Click to collapse
Interesting... Especially since mine was a 509 or something. I guess they missed some units. Oh well, I just JUMP'ed early with my TMo plan to the G5. That was my second G4 after a similar issue 13 days into owning the first one back in November. Having your phone spontaneously die is quite a fun way to spend your anniversary -____-. I wasn't about to give that model a 3rd try. Thanks for replying.

LG G4 H810 Doesn't power up

Hello there, First of all i am new here, This is my first post here... well let's continue with my problem.
I bought a LG G4 about 1 month ago, everything was going perfectly, but 2 days ago it start to install a new android version on the phone, it says a new update was there, so i tried to download it... Everything goes ok and then my phone start with problems, i can't unistall any app because my phone restart, can't do a password because it close, can't use my phone like always...
So i tried to downgrade my phone to a previous android version, i tried this method: http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
I used the kdz method using LG UP, i downloaded the firmware (PR H810PR10a_04.kdz) so i decided to follow the step in the thread mentioned before, everything was ok, it show up 100% and say complete, so i decide to unplug my phone and tried to power up, so what's up? My phone died, i can't make it power up, can't access download mode, can't acess factory reset or anything else, It doesn't power up using power on button, tried to charge and does nothing, PC don't reconigze it...
So maybe i bricked it, Is there any solution to this? As i need help... I am afraid of losing my phone as it was working amazing before.
Thanks you in advance.

moises1012 said:
Hello there, First of all i am new here, This is my first post here... well let's continue with my problem.
I bought a LG G4 about 1 month ago, everything was going perfectly, but 2 days ago it start to install a new android version on the phone, it says a new update was there, so i tried to download it... Everything goes ok and then my phone start with problems, i can't unistall any app because my phone restart, can't do a password because it close, can't use my phone like always...
So i tried to downgrade my phone to a previous android version, i tried this method: http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
I used the kdz method using LG UP, i downloaded the firmware (PR H810PR10a_04.kdz) so i decided to follow the step in the thread mentioned before, everything was ok, it show up 100% and say complete, so i decide to unplug my phone and tried to power up, so what's up? My phone died, i can't make it power up, can't access download mode, can't acess factory reset or anything else, It doesn't power up using power on button, tried to charge and does nothing, PC don't reconigze it...
So maybe i bricked it, Is there any solution to this? As i need help... I am afraid of losing my phone as it was working amazing before.
Thanks you in advance.
Click to expand...
Click to collapse
Anyone can help me please? I really need help with this!

moises1012 said:
Anyone can help me please? I really need help with this!
Click to expand...
Click to collapse
Just give another cable a try. Maybe it's just the charger. Otherwise you may be another victim of the motherboard issue. Which serial? 5xx?

steadfasterX said:
Just give another cable a try. Maybe it's just the charger. Otherwise you may be another victim of the motherboard issue. Which serial? 5xx?
Click to expand...
Click to collapse
Where can i find the serial number? Sorry i am just newbie in this.
About your solution it doesn't work, I have tried diferrent cables chargers and still don't work, It don't make any sign of life, it's dead completely.

Anyone please help me....

moises1012 said:
Where can i find the serial number? Sorry i am just newbie in this.
About your solution it doesn't work, I have tried diferrent cables chargers and still don't work, It don't make any sign of life, it's dead completely.
Click to expand...
Click to collapse
Pull out he battery and you will see the serial. If it starts with 5xx your chances are big that you're another victim of the main board issue.
Check the other threads regarding bootloop and if you wanna recover your data try the freezer or oven method (search for those here)
.

steadfasterX said:
Pull out he battery and you will see the serial. If it starts with 5xx your chances are big that you're another victim of the main board issue.
Check the other threads regarding bootloop and if you wanna recover your data try the freezer or oven method (search for those here)
.
Click to expand...
Click to collapse
No, My serial number don't start with 5, it's 404kxxxxx
Anyways i am going to give those threads a look, thanks you so much.

steadfasterX said:
Pull out he battery and you will see the serial. If it starts with 5xx your chances are big that you're another victim of the main board issue.
Check the other threads regarding bootloop and if you wanna recover your data try the freezer or oven method (search for those here)
.
Click to expand...
Click to collapse
I have read others thread regarding the bootloop issue but it's not my problem... The main problem is my phone is dead... I can't make PC to recognize it, can't put chargers, don't even give any sign of life to power up, LED don't power up... So how can i do any of these methods when i can't make it awake?
Thanks you.

Me too, my phone doesn't turn on anymore, please help

Any solution to this please?

Your phone is proably refurbrished, and it have no all h810 parts inside. So proably it's not H810, and you flashed image for this, that's can be problem. you have to disassembly your phone and check parts.

I buyed it new so it's not refurbrished

Where you bought

Ganjax said:
Where you bought
Click to expand...
Click to collapse
Amazon, I bought it new. I know in amazon are some refurbrished phones but i am sure i bought it new.

moises1012 said:
Amazon, I bought it new. I know in amazon are some refurbrished phones but i am sure i bought it new.
Click to expand...
Click to collapse
Amazon? It's same as aliexpress or even wish

It's an Online shop, I bought it directly of a trusted seller so i am sure it's new... The problem come when it start updating.

LG is having a hard time with dead phones, one of my Nexus 5x just died... It just died and will need to send it to repair.
Enviado desde mi Nexus 5X mediante Tapatalk

LG G3 Bootloop and random restarts

So I was on holiday in London recently and i left my phone charging for a while, when i went to use it to check my texts all of a sudden it froze and got stuck in a bootloop.
After coming back from my holiday i bought a new battery which didnt fix the problem. Sometimes the phone manages to boot up but its either laggy or it ends up restarting into a bootloop eventually. I have tried everything, hard reset, upgrading to 6.0, flashing, and nothing seems to work.
I dont know what else to do at this point, is my phone screwed or am i missing something?
LG D855

find any fix
tried new battery but no luck
factory reset and re-flash

Same here
I have the exact same problem my lg g3 d855 would randomly restart or/and bootloop. I did everything I wiped dalvik cache data even internal storage and started from scratch. It stopped for a while but then again it started to do the same thing. If you find any solution let me now.

This happened to me last night :crying:

lovetatfitties said:
This happened to me last night :crying:
Click to expand...
Click to collapse
Happened same time to a friends LG G3
i just fixed it doing this
Download and install lg drivers for pc http://oceanhost.eu/ed0bnrnghgef/LGUnitedMobileDriver_S51MAN312AP22_ML_WHQL_Ver_3.12.3.exe.htm
Boot phone into download mode (turn phone off, Plug usb cable in first then hold power & volume up immediately after)
Run the program in attatched "B2CAppSetup.rar" and start the update process

EasyAndroidPro said:
Happened same time to a friends LG G3
i just fixed it doing this
Download and install lg drivers for pc http://oceanhost.eu/ed0bnrnghgef/LGUnitedMobileDriver_S51MAN312AP22_ML_WHQL_Ver_3.12.3.exe.htm
Boot phone into download mode (turn phone off, Plug usb cable in first then hold power & volume up immediately after)
Run the program in attatched "B2CAppSetup.rar" and start the update process
Click to expand...
Click to collapse
It worked... Kinda. Now the WiFi/BT doesn't work. This is probably hardware related so I think it's time to move on, but thanks anyways!

lovetatfitties said:
It worked... Kinda. Now the WiFi/BT doesn't work. This is probably hardware related so I think it's time to move on, but thanks anyways!
Click to expand...
Click to collapse
I think this was caused by a virus or bad update. before I updated my friends I managed to get it to to boot once and the Wi-Fi did not work either after update Wi-Fi still did not work. Which would explain why this happened at the same time to multiple people... tried everything to fix Wi-Fi nothing would work he ended up sending it back for replacement under warranty.
All the flash does is update it to the latest android which would not cause the Wi-Fi problem

jimmyjim11 said:
find any fix
tried new battery but no luck
factory reset and re-flash
Click to expand...
Click to collapse
I cant believe this, I was looking at a post i made on another forum a while back and someone said the sd card was corrupted, so i removed the sd card and Lo and ****ing behold my phone is working perfectly again. Somehow the SD card is corrupted or something while still functioning. hopefully this helps, i dont get why this isnt suggested in LGs official troubleshooting guide, ridiculous.

downgrade to kitkat 4.4.2 stock rom
For LG G3 boot loop issue, only downgrading to stock ROM KitKat 4.4.2 worked for me. Newer android releases seem to cause hardware conflicts with this model, especially while using Wi-Fi and enter in a boot loop. To downgrade, I used LGUP Tool and a suitable kdz file as LG stock firmware which you can find after some research on the net.