Develop Bugs

[Q] LG G3 stopped

My LG G3 stop to work, i touched on the screen but no answer just the LED flashed. I had to remove the battery, but when i turned it on just displayed the LG screen and stayed there. I changed the rom using flash tool for Lollipop, the cell phone turned on but song and some apps didn't work. I tried to install Kitkat version again, but it did work. The kitkat rom dont start on my cell phone.
Another problem is i have to keep my screen on all the time, if i do 2 taps on screen or press the on/off button the screen get off and nothing can make it on, just taking off the battery and turning on the cell phone again.
Please people help me. I know you are the best in the world and anyone here in Brazil could help me.
Sorry about the english i don't have a good one.

rmp900 said:
My LG G3 stop to work, i touched on the screen but no answer just the LED flashed. I had to remove the battery, but when i turned it on just displayed the LG screen and stayed there. I changed the rom using flash tool for Lollipop, the cell phone turned on but song and some apps didn't work. I tried to install Kitkat version again, but it did work. The kitkat rom dont start on my cell phone.
Another problem is i have to keep my screen on all the time, if i do 2 taps on screen or press the on/off button the screen get off and nothing can make it on, just taking off the battery and turning on the cell phone again.
Please people help me. I know you are the best in the world and anyone here in Brazil could help me.
Sorry about the english i don't have a good one.
Click to expand...
Click to collapse
If you want return to stock just download stock rom and flash it.
You can use the following link
http://forum.xda-developers.com/show....php?t=2785089
and if you want you can download stock firmware from company by using this link
http://lg-firmware-rom.com/
If I Helped then press Thx button.

rmp900 said:
Please people help me. I know you are the best in the world and anyone here in Brazil could help me.
Sorry about the english i don't have a good one.
Click to expand...
Click to collapse
Hello. ?
I will write easy English so you understand.
Please go to this thread http://forum.xda-developers.com/showthread.php?t=2785089 and read the first post [#1 message].
Follow the instructions CAREFULLY.
It will teach you how to get your phone back to KitKat.
You can also download the firmware KitKat for your phone model from there.
If you don't understand how to do it you can ASK FOR HELP to @hyelton or also to @raptor2003 on that thread.
They are both nice people who help lots of users. They will do their best.
I am trying to help you because I can imagine how you must feel with your phone.
Relax because your phone will be restored and OK.
Good luck. ?
***Let me know if you were successful.

ROOTED VZ G4 Bootloop - Will this break my warranty?

XDA,
I just got into a bootloop while on the Facebook App and I pressed the home button. I read that it happens to random people, but I want to make sure that I am safe.
I rooted roughly 5 months ago, when I got this phone and I've never had an issue.
What are my options? If I call VZ/LG will they accept my rooted phone? Or can I fix this bootloop? Will using this method http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848 help me ?
Thank you,
-J
EDIT: My phone booted up, the apps were optimizing, but then it just rebooted back to the LG screen and now it's stuck there.

[removed by dentralp]

dentralp said:
Don't want to do fear mongering just keep people in the know...
If you are stuck on LG screen you could have the same issue as;
http://forum.xda-developers.com/g4/help/lg-g4-stuck-bootloop-t3268734
I had full bootloops apart from when MM was installed, it just sat there on the LG logo. Could be that your on MM with the issue?
I have tried LG Bridge, Flash Tool and LG Up with various different roms, both LP and MM nothing worked.
Mine is also Rooted, with the bootloader unlocked. LG UK have been sat with my phone for over a month - hopefully I will find out soon if they have fixed it using the warranty - but even if they do, mine is with LGUK not LGUS ...
Think what I am trying to say is, try all the methods and if it doesnt work send it for RMA with your fingers crossed :/
Click to expand...
Click to collapse
Just so I understand you, I basically have to RMA my phone? All the other options seem like they resulted in a bootloop. And RMA I'm assuming you mean using warranty?
And I'm not on MM.
Just out of curiosity, would the fact that I rooted my phone disqualify me for using mywarranty?

I guess you rooted with injected system.img. If you can go to download mode you could write the original system.img back, so then you are not rooted. Or you could write a KDZ file in LGUP.

ObiDanKenobi said:
I guess you rooted with injected system.img. If you can go to download mode you could write the original system.img back, so then you are not rooted. Or you could write a KDZ file in LGUP.
Click to expand...
Click to collapse
As far as I'm aware, simply restoring an original unrooted system.img backup will still show "Modified" in the download mode status, once it's been rooted. The only way to clear that status is by flashing the KDZ. (You can still keep your personal data with that option though.)

iamjerry123 said:
XDA,
I just got into a bootloop while on the Facebook App and I pressed the home button. I read that it happens to random people, but I want to make sure that I am safe.
I rooted roughly 5 months ago, when I got this phone and I've never had an issue.
What are my options? If I call VZ/LG will they accept my rooted phone? Or can I fix this bootloop? Will using this method http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848 help me ?
Thank you,
-J
EDIT: My phone booted up, the apps were optimizing, but then it just rebooted back to the LG screen and now it's stuck there.
Click to expand...
Click to collapse
Based on what I've read in the main bootloop thread, the bootloop issue is a hardware problem that requires the phone motherboard to be replaced so I don't think they will be able to detect the root during the RMA process:
...
I have received confirmation from LG that series from May, June, July and August are afflicted by this issue and that the revision number doesn't matter. They also said that it is not necessary that all phones in these series will fail, but that under certain circumstances (not disclosed to me) they will start producing the bootloop issue which is h/w bound.
...
Update: It seems not all bootloops are due to deffective motherboard as on some phones they were able to detect the root and refused the repair under warranty.
So maybe for some G4's stuck in bootloop there might be a solution to be soft repaired.
I saw this in another thread, can you try this?:
...
Using DL mode (device off -> press and hold volume up while(!) connecting to PC) and LGUP you should be able to push any KDZ on your device and get out of the boot loop.
...
I don't have the bootloop problem so I can't test it but it might.
What's the build date of your G4 (between May-August 2015?)? What are the 1st 3 digits of your phone's S/N?

If you root any phone you automatically void your warranty. There's no exception to this and I actually understand why they do that because most people don't need to be rooting their phones lol but if u find a KDZ you're str8, use the flashtool and you'll never get into a permanent bootloop and you can use your warranty. But most likely something you modified or something another app was doing caused the bootloop not a hardware issue. Also it'd probably the last thing you ever even thought that caused it lol
Sent from my VS986 using Tapatalk

Have you tried a hard factory reset? Usually helps

Flashed Wrong Kernel... Where To Go From Here? [6.0.1] [SM-G920P]

EDIT - Solved! If you have this same issue, flashing the stock ROM will likely fix the problem. The working ROM I used can be downloaded Here : www( . )androidfilehost( . )com/?fid=24459283995306913 (remove parenthesis)
Credit to user koop1955 for providing the link in another thread.
REMEMBER TO ONLY USE IF YOU ARE ON 6.0.1 AND HAVE THE SPRINT SAMSUNG GALAXY S6 MODEL SM-G920P DO NOT MAKE THE SAME MISTAKE I DID.
Hello, I was following a guide to root the S6, and as a part of the guide you flashed the "Space-X" kernel onto the phone with ODIN. Well, the kernel was meant for the model SM-G920F and not the SM-G920P. I realized my mistake as soon as I booted the phone and suddenly I have no touch screen or cell service.
Reading up on it, I discovered that flashing incorrect kernels and ending up with a non-functioning touch screen is likely an indicator that the digitizer itself was fried, however I flashed TWRP and discovered that my touch screen indeed works! So I can use the touch screen functionality in the TWRP menus, but when booting the phone to its normal screen I do not have the touch screen functionality. I can still use the phone through a mouse OTG cable, and besides the lack of service or touch screen, it is completely normal (even rooted).
I have tried flashing stock firmware onto the device through ODIN however I receive an error every time I attempt to do so. I have tried different USB ports, re-installing drivers, restarting the PC, you name it.
Currently I am not using the phone, however in its current state I have the (incorrect) Space-X kernel and TWRP Version 3.0.0-1
Would replacing the kernel with one meant specifically for the G920P likely fix my issue? How would I go about doing that? What else would you recommend I try? Ever since I discovered that the touch screen may just be non-calibrated instead of totally fried, I've had a burning hope inside that I can salvage this phone. This time, however, I'd like to get some more experienced opinions.
Thanks in advance for any help.

mys6iskindabroken said:
Hello, I was following a guide to root the S6, and as a part of the guide you flashed the "Space-X" kernel onto the phone with ODIN. Well, the kernel was meant for the model SM-G920F and not the SM-G920P. I realized my mistake as soon as I booted the phone and suddenly I have no touch screen or cell service.
Reading up on it, I discovered that flashing incorrect kernels and ending up with a non-functioning touch screen is likely an indicator that the digitizer itself was fried, however I flashed TWRP and discovered that my touch screen indeed works! So I can use the touch screen functionality in the TWRP menus, but when booting the phone to its normal screen I do not have the touch screen functionality. I can still use the phone through a mouse OTG cable, and besides the lack of service or touch screen, it is completely normal (even rooted).
I have tried flashing stock firmware onto the device through ODIN however I receive an error every time I attempt to do so. I have tried different USB ports, re-installing drivers, restarting the PC, you name it.
Currently I am not using the phone, however in its current state I have the (incorrect) Space-X kernel and TWRP Version 3.0.0-1
Would replacing the kernel with one meant specifically for the G920P likely fix my issue? How would I go about doing that? What else would you recommend I try? Ever since I discovered that the touch screen may just be non-calibrated instead of totally fried, I've had a burning hope inside that I can salvage this phone. This time, however, I'd like to get some more experienced opinions.
Thanks in advance for any help.
Click to expand...
Click to collapse
Jist Use odin to flash stock rom and u will be ok.

Yarraque said:
Jist Use odin to flash stock rom and u will be ok.
Click to expand...
Click to collapse
Yep I tried this many times, but I tried it again today by using a different ROM and different ODIN with success!
Cell service and touch screen are back to normal. Thanks for the reply :laugh:

[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 G8s Screen After Complete Factory restore, Screen Lost sync, then went Black

Hello.
I have an LG G8s that was functioning completelly well.
I did a full factory reset from the system settings (complete format).
The phone showed the typical message 'the phone will reboot twice', I left it over the table then pushed the button that says 'restore'.
It made the first erasing, then reboot but in the middle of that first boot the image of the LG logo went corrupted. Then it was corrupted all the time.
It seemed as if it had lost the screen syncing but still visible enough and the touch screen functioning completely ok.
I repeated the factory reset again, nothing changed, then I didn't try anything else.
Powered off, and on some time, all the same... 3 times powered off and on and then the screen went finally completely black.
Trying again off and on some times, all black.
For some reason during one boot the LG logo appeared perfectly well for 1 second and then again black...
"All Black" is now the situation...
Any ideas about how to fix it?
Please help!
Thank you in advance!

Alejoven80 said:
Hello.
I have an LG G8s that was functioning completelly well.
I did a full factory reset from the system settings (complete format).
The phone showed the typical message 'the phone will reboot twice', I left it over the table then pushed the button that says 'restore'.
It made the first erasing, then reboot but in the middle of that first boot the image of the LG logo went corrupted. Then it was corrupted all the time.
It seemed as if it had lost the screen syncing but still visible enough and the touch screen functioning completely ok.
I repeated the factory reset again, nothing changed, then I didn't try anything else.
Powered off, and on some time, all the same... 3 times powered off and on and then the screen went finally completely black.
Trying again off and on some times, all black.
For some reason during one boot the LG logo appeared perfectly well for 1 second and then again black...
"All Black" is now the situation...
Any ideas about how to fix it?
Please help!
Thank you in advance!
Click to expand...
Click to collapse
Let me guess,Android 12 was installed?I have seen reports where the A12 update is having problems with screen flicker,non-responsive touch screens and apps crashing!Go here,and grab the firmware of your model.Do a refurbish with LGUP.I would roll it back to the last A11 firmware and see what it does.I think you'll be fine on A11.I just updated my G8x this morning to A12,and I was watching it to see what it does myself.
Models - LG-Firmwares.com
Free archive of LG firmwares. Comparison of features and reviews of all mobile devices. Quick download of updates for your device.
lg-firmwares.com

Surgemanxx said:
I have seen reports where the A12 update is having problems with screen flicker,non-responsive touch screens and apps crashing!
Click to expand...
Click to collapse
Hmm... Interesting. News to me, but good to know. I guess I got lucky. I flashed my G8 (originally from US Cellular) with 3 different variants of A12 (UCL, Open CA, Open US), and didn't get any problems.

kt-Froggy said:
Hmm... Interesting. News to me, but good to know. I guess I got lucky. I flashed my G8 (originally from US Cellular) with 3 different variants of A12 (UCL, Open CA, Open US), and didn't get any problems.
Click to expand...
Click to collapse
Yes,I was reading through Reddit about it the other day.Could be certain variants,which they didn't state which ones they was using.They did say it was all happening since the A12 update was pushed to their devices.On the other hand,could be a corrupt download which is odd because any update is verified before it ask to restart.

Surgemanxx said:
Let me guess,Android 12 was installed?I have seen reports where the A12 update is having problems with screen flicker,non-responsive touch screens and apps crashing!Go here,and grab the firmware of your model.Do a refurbish with LGUP.I would roll it back to the last A11 firmware and see what it does.I think you'll be fine on A11.I just updated my G8x this morning to A12,and I was watching it to see what it does myself.
Models - LG-Firmwares.com
Free archive of LG firmwares. Comparison of features and reviews of all mobile devices. Quick download of updates for your device.
lg-firmwares.com
Click to expand...
Click to collapse
Hello.
Thank you so much for the answers, the info and the interest.
I have tried changing the ROM, my phone is detected as com port 5 but unfortunately LGUP doesn't detect it.
Also I have tried LG FANs firmware but when I push download the link is broken...
Any idea of what to do in order for LGUP to detect it?
Thank you so much in advance!