[Q] Phone keeps rebooting at LG logo without a charger - G3 Q&A, Help & Troubleshooting

Hello everybody at the LG G3 part of XDA,
A friend of mine has an LG G3 and his phone broke. So he asked me to fix it. I myself am an Oneplus One user.
So the problem is really simple to explain. The phone doesn't work when there isn't a charger plugged in. When there is a charger plugged in everything is fine and the phone works normally.
So my friend tried to downgrade from lollipop to kitkat ( I don't know what he exactly did ). He doesn't have much knowledge about phones so ofcourse it went wrong.
Here is a video of what happens.
https://www.youtube.com/watch?v=VP8MUPsANes
I already did a full reset with the LG flash tool and put the stock 4.4.2 Kitkat rom on it.
I have also checked the battery and it has a normal voltage of 3.8v. My friend also told me that he already swapped the battery in a store.
I do not know anything about a stock recovery of an LG G3, but I tried to acces it and I could get in to the hard reset screen but when opted Yes for everything it got stuck in that same "bootloop". When the phone is in the Hard reset menu then it wil stay ON without a charger. In all other cases it wil stay in a "bootloop"
I asked another friend of mine who has a lot of experience with phones. He said that it might have something to do with the a file that keeps the battery in check in the bootloader or the recovery, but he wasn't sure which one.
Update: When I am on the lockscreen and I disconnect the charger the phone stays on until I touch the screen than it shutsdown immediately

Try to flash lastest kdz of your g3 model
Here :-
http://forum.xda-developers.com/showthread.php?t=2797190

Replace your battery. This is what happened to my phone last september, I thought it was a software related issue, but when I tried to insert my friend's G3 battery, it just boot normally. I think this is a common problem of the phone/battery.
P.S. I tried running stock again, tried on CM, AOSP, etc. but can't make my phone to boot without being charged, until I replace my battery...

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Dead or not? Questions about my E975

Hi everybody. I managed to soft brick my brand new Optimus G by uncarefully removing some unneeded Google apps. After that phone did not boot and all I see was LG logo in booting screen and "Security check failed" message (or something like that). After that I tried to solve my problem by following this guide. http://forum.xda-developers.com/showthread.php?t=2249500. I managed to flash the bin and phone booted correctly after 67%. But after that there have been some problems. I managed to open fastboot-menu (I think) once and after that there has been no luck. There seems to be some problem with charging as phone is not showing any signs when put to charger and nothing happens when I try to open fast boot or download mode.
So, is my phone already dead or do I still have hope? I read somewhere that these charging issues could be solved by removing battery but I dont have Torx 5 to try it yet.

LG G3 not turning on !

Hi Guys I have a problem. I have a rooted LG G3 D855 with v2.8.6.0 TWRP and Blisspop ROM. Now my problem is that I was running SparTaxx ROM on it since yesterday. Today all of sudden it switched off and then I tried to turn on but it wasn't turning on... After removing battery and trying 2-3 times it turned on and then I went to TWRP and quickly flashed Blisspop ROM so that I can get things working and be on the safe side. Now after flashing it successfully the device isn't booting properly and getting switched off. It is not turning on at all. Only when I charge it it turns on then switches off.
There could be 3 cases which I am thinking but I could be wrong
1) Device is R.I.P
2) Battery needs to be changed
3) The device will either get repaired by some repair centre or maybe it wont work...
What do you think guys?
Any guidance or help is appreciated.
I think that is better for you flash a stock firmware with the LG Flash Tools in case of needs of warranty.
Is only an advice.

LG G3 problem

hello, my phone won't boot up unless it's plugged in charger..
If not it just keeps rebooting ( bootloop )
Is it a battery problem ?
Probably it's a problem with your firmware. Try to do a fresh stock kdz flash
It may be a battery issue, not 100% sure due to the fact that many G3 users states that a new battery doesn't seem to be the solution in all the cases, anyways it's worth a shot
replacement
I had same issue until i changed my battery. Now it works flawlessly.

LG G3 stopped working after installing recovery

Today I was trying to install a custom rom, but I messed it up and had to reset it to stock rom.
After that I reseted it back to stock rom, I rooted my phone with Kingroot and used this app: https://play.google.com/store/apps/details?id=b007.autorecd855 to install recovery. After that I powered off my phone and now it won't turn on. Already removed battery a plenty of times, when putting in the charger nothing happens, pc won't see it also.
The only moment when my phone lights up is when I remove my battery and put it in the charger, then it basically says that it's charging but with no battery in it. Also when removing the battery and connecting to my pc it only sees it as a unrecognizable device.
Suggestions on what I can do? IF not, poor me, gonna buy a new smartphone then.
Btw, I still have some garanty. Maybe it's worth sending it to the support services.
Extra info:
g3 d855
You used wrong autorec install LP recovery to MM. Download MM version autorec from LG G3 Xda forum. Try flash back to stock or something else. Instructions are in LG G3 Xda forum if you search more. Sorry.
pjadec said:
You used wrong autorec install LP recovery to MM. Download MM version autorec from LG G3 Xda forum. Try flash back to stock or something else. Instructions are in LG G3 Xda forum if you search more. Sorry.
Click to expand...
Click to collapse
Hmm, I was really sure that I used the right one.
Anyway, how can I flash it again if I can't even get the lg logo to show, neither get him in download mode or that my pc recognises him?
Btw, I still have some garanty. Maybe it's worth sending it to lg.
If you have no access to any recovery mode, Fastboot or download mode.then use the method of Qualcomm 9008.btw your warranty is void because you have rooted device and messed with it.
RobinHood_3 said:
Hmm, I was really sure that I used the right one.
Anyway, how can I flash it again if I can't even get the lg logo to show, neither get him in download mode or that my pc recognises him?
Btw, I still have some garanty. Maybe it's worth sending it to lg.
Click to expand...
Click to collapse
I also had same issue and I'm also sure that I used the correct Autorec version.
I sent the phone to LG because the warranty is still valid.
I know how to fix this
RobinHood_3 said:
Today I was trying to install a custom rom, but I messed it up and had to reset it to stock rom.
After that I reseted it back to stock rom, I rooted my phone with Kingroot and used this app: https://play.google.com/store/apps/details?id=b007.autorecd855 to install recovery. After that I powered off my phone and now it won't turn on. Already removed battery a plenty of times, when putting in the charger nothing happens, pc won't see it also.
The only moment when my phone lights up is when I remove my battery and put it in the charger, then it basically says that it's charging but with no battery in it. Also when removing the battery and connecting to my pc it only sees it as a unrecognizable device.
Suggestions on what I can do? IF not, poor me, gonna buy a new smartphone then.
Btw, I still have some garanty. Maybe it's worth sending it to the support services.
Extra info:
g3 d855
Click to expand...
Click to collapse
i remember after 1 day of having this phone this happened this was likely caused by having the latest boot loader i remember this because i fresh installed the marshmallow kdz after that i installed autorec mm it told me to restart and my phone died there, however after spending 8 hours straight i found a solution the smart boot diagnostics tool can write an older version of the boot loader understand that your phone must be in the qdloader9008 mode, if your PC doesn't detect the phone make sure you install the drivers in the zip from the download install the 32 bit if on 32 bit system or install 64 bit on 64 bit system. Hey if you need assistance on doing this Download team viewer and i'll be more than welcome to help unbrick our d855
http://www.4shared.com/postDownload/jACBEo-zba/SmartBootDiagv131_Oversea_SVC_.html

Help my G3 might be hardbricked (hopefully only softbrick)

Hello, I would like to ask if my LG G3 is softbricked or hardbricked. It has been a long while since it decided to boot loop. I tried to fix it but got no results. I tried to factory reset it, but the next day it didn't turn on anymore and got stuck in the logo. Note : the phone was experiencing some heating issue before it decided to screw itself up. I tried numerous troubleshooting from the net, none worked. I also did try to reinstall the firmware to stock again, it did boot but it can't get to the home screen. I then factory reset it again and tried using another firmware also built for my phone (it's LG G3 D855). It failed again at 33% while it was in the firmware update mode. Now that I have left it for a solid year, I thought that it would be nice to try again. Which I did, but it couldn't charge anymore and it cannot boot to the logo. I tried to go to the download mode but no response. I tried connecting it to my computer, but it only detects my phone as a charge only device, it also detects it on only several random occasion. I hope this is a softbrick and it can be fixed at home so I don't need to go to the store to repair it.
I'm sorry for the long explanation, I had been trying to revive it for months now and had no luck. How do I fix this, at least how do I get to the firmware update download mode again? I really really hope that anyone can help. Thankyou so much in advance.
Use my guide in this thread
https://forum.xda-developers.com/lg...w-d855-30b-t3286268/post72875603#post72875603

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