Intermittent bootloop - G4 Q&A, Help & Troubleshooting

As of a few days ago, my LG H815 has random bootloops, like it will boot up fine, work for around 1-2 minutes, freeze, then reboot and bootloop, and then after a while it will reboot and boot fine again, but then freeze after 1-2 mins of use and so on...
Tried putting in download mode, LG bridge recognises it, says connected, then says device disconnected.
tried KDZ method and it starts fine, but stops arount 15% each time
cannot seem to get into TWRP or anything
device has MM on, with TWRP, imperium ROM v1.x and has an unlocked bootloader
I am in the UK and have the international H815 model

Grudenkles said:
As of a few days ago, my LG H815 has random bootloops, like it will boot up fine, work for around 1-2 minutes, freeze, then reboot and bootloop, and then after a while it will reboot and boot fine again, but then freeze after 1-2 mins of use and so on...
Tried putting in download mode, LG bridge recognises it, says connected, then says device disconnected.
tried KDZ method and it starts fine, but stops arount 15% each time
cannot seem to get into TWRP or anything
device has MM on, with TWRP, imperium ROM v1.x and has an unlocked bootloader
I am in the UK and have the international H815 model
Click to expand...
Click to collapse
isnt this the famous bootloop issue.?

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LG G3 keeps freezing HELP!!! PLEASE!!!

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i flashed twrp and cloudy g3 2.5 and both was working fine until this afternoon i dont know what happened but my phone just rebooted and vibrates 4-5 times before entering bootloader and then enters twrp. i tried restoring my nandroid it faiLS. i successfully flashed a kdz in cse mode and then it started giving me lag and also the screen will turn off and wont come back on so i pulled the battery and flashed the same kdz in normal mode but now my g3 doesnt show up in the pc but it doesnt say unrecognisable device. just nothing happens but the phone still charges and shows mtp also the phone freezes and then turns off the display and it wont come on again. factory resetting doesnt work.
any ideas on how to get this phone right? please i need help asap
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Still stuck in LG logo bootloop after using LGUP

Hi, I have an LG G3 VS985 on 47a (according to LGUP) and I recently tried installing an OTA update that I have been putting off for a while. During the update I got an error that froze the updating process so I pulled the battery. After pulling the battery I can not get passed the LG logo in the beginning. The logo will show up, turn black for a few seconds, vibrate, then restart again. I tried downgrading using the TOT and KDZ methods but kept getting a no ks version error or some other type of problem. So then I decided to use the newest 48a KDZ file and LGUP to update/overwrite what I have installed right now. The process starts and the phone shows that the installation is working but when LGUP gets to the point where it has to restart the phone (about 80%), it just keeps bootlooping instead of going on with the installation. I tried clearing cache, factory resetting, and everything else I can think of. I read that the bootloader might be corrupted? If that is the case, how would I go about fixing it? Thanks in advance.
Edit: Another strange thing happens when I plug my phone into a charger from the off state. Instead of showing how much battery is charged, it just shows a loading circle on the battery picture then proceeds to restart into the loop (without me touching the power).
Exact same problem I'm having
1 difference my led light does not work . Is there a fix? Need help

LG G3 d855 rooted (sudden demigod TZ-Kernel crash)

So..I have this d855 2gb 16gb variant.
It is rooted,it has cyanogenmod 13 nightly with kernel adiutor(with cpu governor set).It worked like a charm (3 months till the last update).
Today I launched youtube app and all of sudden it restarted..and it kept restarting in a bootloop.( he passes lg logo and enters the android one and after 10 15 sec it reboots.)
I tried to charge it,change batteries but with no luck.
I deleted dalvik cache and cache..but still nothing
then I tried to flash again the rom and there the phone gives me 35% of the times demigod:TZ crash with green screen.. and the other times demigod:Kernel crash.
I decided to delete kernel adiutor folders hoping for a luck..nein. ( using twrp)
I can access TWRP,it works fine but when flashing sometimes it gives me that demigod errors.
I can pass the LG logo but it gets stuck at android logo then restarts..or at finalizing/preparing apps.
baseband-modem: 21C
cm version: 13.0 2016 10 22
any help?
UPDATE:
Windows detects my phone as "LG Android Usb Device".
UPDATE2:
after leaving it resting one night it booted.
i still need help fixing it because it's not normal.
It worked fine from 6am till 1pm.
Now it freezes and restarts randomly.
need help guys..
Flash stock rom and test for crash couple days. If still crash, then if your G3 has still warranty to service. Probably MB broken.
If no crashing then root and flash rom
pjadec said:
Flash stock rom and test for crash couple days. If still crash, then if your G3 has still warranty to service. Probably MB broken.
If no crashing then root and flash rom
Click to expand...
Click to collapse
Unfortunately it gave me demigod: hw reset and no longer wants to load TWRP or download mode.
It restarts at the logo or at the android loading. I'll give a shot for the warranty.

is my G4 hard bricked ?

Well my G4 (VS986) has been running ok on 13b rooted since december 2015, and today it suddenly died, it was on my desk and when I tried to use it the screen was black and it won't turn on, something like this had happen before but I usually just remove the battery and voila it had it working again. But not this time.
Now It only goes to the LG screen and then it turns off again (but it doesn't bootloop) so I keep trying then I connected the phone to the charger and it tried to boot again and this time it went to a black screen saying Secure Booting Error and it was error code 1007 but it went off again.
Then I tried to access recovery mode and it can access and be there for 40 min and it wont turn off, however I can't put it on download mode alway when is connected to the PC it says "qhsusb_bulk"
Anyone have any idea on what happen and how to fix it.
Thanks.
Nevermind.. Say hello to a new bootlooping LG G4 !!
I put it on the freezer and after 20 minutes the phone boot up normal, but after a few minutes it went the famous boot loop.
Time for a new phone

Need Help Bootloop on LG G7

Hello, I have the LG G7 thinq. The Device is on Bootloop but I don’t know why!! It starts again and again. It comes to the Red LG Logo and than It boots again. Please Help
zzman31 said:
Hello, I have the LG G7 thinq. The Device is on Bootloop but I don’t know why!! It starts again and again. It comes to the Red LG Logo and than It boots again. Please Help
Click to expand...
Click to collapse
Please describe what happened prior to this before you start a whole big riot again.
Hello, I have this problem well. It started 8 hours ago. I was using it normally, no root or anything. And suddenly when I take it out of the pocket, it just keeps restarting.
I'd like to recover all my data before hard reset. Any help please?
Couldn't even turn it off, I had to wait until battery died.
Hello, same problem here. 2 hours ago I received a WhatsApp message and suddenly it restarts again and again.
Me too! But after two factory restarts I found the problem I guess.
For me, it occured twice when I started Airplane mode and after that everything went to...
Now I am affraid to start airplane mode again
What ROM and version are you guys??
V10f-EUR-XX
My version is V10k-EUR-XX.
After 2 factory resets it looks like my SIM card is the problem.
Without card the phone starts... But in my old LG G6 the SIM card works well.
I tried it with and without SIM as well, but it behaved the same. Sometimes I got into the system, but it just got stuck right away and bootlooped again.
But weird, because for me its airplane mode, which disables/enables celular, so SIM again.
I got T-Mobile, you?
I got t-mobile, too.
So lets wait for stormeye25, I wonder if he also has t-mob
Airplane mode is working well. Without a SIM ...
I am working with SIM. Only when I switch airplane on it stucks again. First time it was me turning airplane off, second time turning it on. Always with SIM and working celular
I tried without sim. Same problem. Also sometimes it boots up, but freezes after 2 seconds. I have the Europe version
I have same problem and i dont know what to do. Problem start about 5 hours ago (what i know last working time was 2:00AM CET). Itself reboot in boot screen or immediately on screen lock after start. I did factory reset, it work for few minutes and again. Version G710EM DEC (germany open market) last FW
It's something from lg ?
Update gone wrong maybe
Exact same problem on my G7 Thinq. Started about 8 hours ago. Boot loop, managed to get it in factory reset mode. Did nothing. Managed to reset it again (without the SIM in) then it booted. After reset it does not recognize (any) SIM. Called Tmobile to ask some questions about repair-process, they told me I was the 3th today with this problem. At this point I wish I wrote down my Google's 2FA recover keys :'). Can't access anything at the moment.
Same bootloop here, g7 thinq bought in Hungary Unlocked, but it downloaded the local t-mobile branding.
It was untouched on charger. When I wanted to pick it up it was already bootlooping and hot.
Put it into freezer, it booted, wallpaper lockscreen arrived, but nothing more.. it was stuck and started bootlooping again after like 30 secs.
Any info / resolution you have?
Okay so it happened again for me with not changing airplane mode or anything. Now I will try without SIM card. I will try to get into touch with our corporate t-mobile associate... Can we pinpoint if its t-mob (SIM) or something to do with LG?
Same here, G7 bought through TMobile Netherlands. I had turned it on airplane mode before going to bed, and when I tried to put airplane mode off it got stuck.
I'm waiting for the battery to die so I can try to wipe the cache...
Flash back to V10F did not help. More accurately until I insert sim (T-mobile) it looks like it works, after inserting sim freezes and resumes bootloop
Okay, out of the blue when in my pocket I noticed my phone was very hot and appeared, also without warning, stuck in a boot loop. Also on T-mobile...I had no problems before.
***Edit*** For the record I run a stock phone/firmware that I have never tempered with...

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