Develop Bugs

[Q] My Phone wont boot up! HELP

Problem SOLVED!
Thank you all!

Hi ClarkOwen, would you care to share what happened and how to solve it? My Optimus G won't boot with red flashing led.

What rom are you using?
I tried to boot into safemode by turning on with power button + volume down button and holding it till it boot up then I uninstalled framework and gravity box as i think they are preventing my phone to boot up and then I rebooted my phone and it worked
What exactly did you do with your phone? What caused it not to boot up anymore?

There are senarios where you do get to restoer your phone using kdz but then it still wont boot up with red led blinking which basically means the battery needs to be hardware reset - taken out of the phone which would require you to open up your phone which is difficult. Thats why I need to know first what happened which prevents your phone to boot up.

ClarkOwen said:
There are senarios where you do get to restoer your phone using kdz but then it still wont boot up with red led blinking which basically means the battery needs to be hardware reset - taken out of the phone which would require you to open up your phone which is difficult. Thats why I need to know first what happened which prevents your phone to boot up.
Click to expand...
Click to collapse
Thanks for your reply. I run stock ROM and was preparing for flashing with CM11. I installed ROM Manager and updated my clockmodwork recovery. Then I boot to recovery when this disaster began. The phone just wont boot.
I followed the instruction found in this forum to unbrick using kdz updater and LGNPST and yes I needed to disconnect the battery first. Open up the battery cover was difficult but I managed to to it. After numerous attempts I managed to complete the step for both kdz updater and LGNPST but that still wouldn't boot the phone. Not even into recovery. I could get to the download mode though.
The last successful attempt with KDZ updater (successful means completed steps) has caused my phone totally dead. Now it won't respond in anyway. No flashing led, nothing. I suspect the battery could be dead.
Is it true that we can't charge the battery when the phone is (soft)-bricked?
Anyone knows how to charge LG Optimus G battery in the case of emergency? Ie. not through the phone? I read post about charging using stripped-out USB cable but I don't know where is the +/- of the battery.

Black Screen, Blinking Red and Blue LED after boot

Hi all,
Before someone says it, yes I did look around for other threads before posting one of my own. I was not able to find the problem that I am having, nor a working solution.
I am currently running CM12.1 on a Sprint G3 (LS990). This morning, I woke up and found that my phone had frozen while charging overnight. No problem, this has happened before, so I unplugged it and pulled the battery out and rebooted. It was working fine, and then I noticed an update for CM. I hit download, and went to go brush my teeth. When I came back, I saw that it had frozen mid-download. Now it wasn't installing anything; the CM built in updater was just downloading the latest nightly. I waited 5 minutes for it to become responsive, but it never happened so I pulled the battery once again.
Now when I held the power button to start my phone, I saw the LG splash screen as normal. After that, the screen went dark and the LED began blinking red and blue. No matter how many times I pulled the battery to reset my phone, this would occur. I attempted to enter Recovery mode, but in this case after the splash screen the LED would briefly light up blue, and then the phone would reboot, and the cycle would repeat. The same would occur when I tried to boot into download mode.
So now that I cannot boot into anything at all, I assume that my phone is bricked. It is still covered under the limited manufacturer warranty, and since I can't boot up at all I assume it doesn't matter that it is rooted, but before I contact LG I would like to see if anyone here has any ideas.

Before sending it back, have you tried to use the KDZ tool to restore it?
http://forum.xda-developers.com/showthread.php?t=2785089

RapHaeL_4_4_4_ said:
Before sending it back, have you tried to use the KDZ tool to restore it?
http://forum.xda-developers.com/showthread.php?t=2785089
Click to expand...
Click to collapse
That requires the phone to be in Download mode, and it won't enter Download mode, so I have not tried that.

Well, this happened to me after I flashed TWRP from Flashify on my LG G3 D855 in the day before yesterday and I just had to take the battery out and put it back in, and then I had to boot into download mode. Since you can't even boot into download mode, I'm almost sure the phone is bricked

FelipeGouliouras said:
Well, this happened to me after I flashed TWRP from Flashify on my LG G3 D855 in the day before yesterday and I just had to take the battery out and put it back in, and then I had to boot into download mode. Since you can't even boot into download mode, I'm almost sure the phone is bricked
Click to expand...
Click to collapse
Yeah I assumed as much. Sent it to LG today, so thank you guys for trying to help.

ashingtondc said:
Yeah I assumed as much. Sent it to LG today, so thank you guys for trying to help.
Click to expand...
Click to collapse
You HAVE to flash your phone if it was rooted or bump'd, otherwise, it won't be under warrenty, even if it don't boot, they're not stupid..
Every post have: "Your warranty is now void." in it for a reason.

Nexus 5X stuck at Google Screen. Won't boot stock recovery.

I was just using my phone like normal today opening up the transit app at the bus stop and it randomly froze and restarted. After that, it only shows the initial Google screen and just keeps bootlooping, but never even gets to the part where the OS is loading (with the google animation). It was just on stock 6.0.1, MTC20K I think. Was not rooted. Bootloader was/is unlocked. Secure boot was/is enabled. It won't even go into stock recovery (when I select recovery it immediately goes back to the Google screen and continues as if I had never selected recovery). I have tried manually flashing each piece of the latest factory 7.0.0 build (NRD90S), but even though fastboot says everything was successful, nothing seems to have changed. Any ideas on how to fix this?

Same thing just happened to me. I have no root or anything but it will not boot the OS. I hope there is a fix for the problem because I really want to use the phone.

Same thing just happened to me.
Click to expand...
Click to collapse
No recovery for you either?

What was the latest Build you had when it was working fine?

To get into the recovery plug the phone into your computer. Go into fastboot (vol down + power) and select the power off option. When it turns off or goes to the charging screen, hold volume up + power to boot to download mode. Once in download mode, turn the phone off by holding vol down + power, then go back into fastboot and you should be able to now access recovery mode. This is what I did, and then flashed back to 6.0.1 and it runs fine now. No Idea why going into download mode allows you to then access recovery and get one clean boot, but it does

Druas said:
I was just using my phone like normal today opening up the transit app at the bus stop and it randomly froze and restarted. After that, it only shows the initial Google screen and just keeps bootlooping, but never even gets to the part where the OS is loading (with the google animation). It was just on stock 6.0.1, MTC20K I think. Was not rooted. Bootloader was/is unlocked. Secure boot was/is enabled. It won't even go into stock recovery (when I select recovery it immediately goes back to the Google screen and continues as if I had never selected recovery). I have tried manually flashing each piece of the latest factory 7.0.0 build (NRD90S), but even though fastboot says everything was successful, nothing seems to have changed. Any ideas on how to fix this?
Click to expand...
Click to collapse
Had the same thing happen - Now typing to you from my warranty replacement. Only option.

blackpaw78 said:
To get into the recovery plug the phone into your computer. Go into fastboot (vol down + power) and select the power off option. When it turns off or goes to the charging screen, hold volume up + power to boot to download mode. Once in download mode, turn the phone off by holding vol down + power, then go back into fastboot and you should be able to now access recovery mode. This is what I did, and then flashed back to 6.0.1 and it runs fine now. No Idea why going into download mode allows you to then access recovery and get one clean boot, but it does
Click to expand...
Click to collapse
Surprisingly, this worked. I forgot about download mode being an option. I also am not sure why this worked.
Edit: The phone boots, but is still randomly rebooting rather often. Not sure why, as everything was wiped and it should have been a fresh install of everything.
Another Edit: Back to boot looping/not getting to the Android loading screen. I didn't do anything other than let it download my apps. Maybe it is a hardware problem after all because it did successfully boot into Android a couple times.

This seems to be a common problem which I have, too. Looks like a whole series of devices had these issues. Currently LG is unable to repair my device because auf missing spare parts they say. So after effortless 3 weeks they will send my unrepaired device back to me with a letter for my dealer to get back my money.
Nice quality and service, LG - NOT!

Janny82 said:
This seems to be a common problem which I have, too. Looks like a whole series of devices had these issues. Currently LG is unable to repair my device because auf missing spare parts they say. So after effortless 3 weeks they will send my unrepaired device back to me with a letter for my dealer to get back my money.
Nice quality and service, LG - NOT!
Click to expand...
Click to collapse
That is actually pretty good outcome. Pixel phone is coming out soon.

Just had this happen today. Streaming music over Bluetooth and using another app, then tried switching tracks in Google Play Music and the app froze. Phone was unresponsive with app on the screen, then screen went off and wouldn't power on.
I finally got it on by holding down power for 30 seconds, but kept boot-looping to Google boot screen. I was able to get into fastboot mode and wipe everything and install the factory image. Still doing the same thing!
Just got off phone with Google. Told the rep everything I had tried and she is working on a replacement order. Supposed to call me back after chatting with higher level support. I wish they would just send me a new Pixel phone, or the 6P at least!

Ive had the same issue, where I just couldnt get passed the Google screen, the only solution for me to get back on to my phone was to let it happen until the battery died. After i let the battery die i turned it back on normally and connected it to my charger, it hasnt turned off since but im sure it will sooner or later
Edit: Issue is still happening but the only way for me to turn it back on is because the battery dies

This just happened to my and my wifes phones...all within a week of each other. I sent my wife's in about a week and a half ago to LG for warranty service. I am hoping that they are able to fix it...it is still in the 'repair' phase. I am trying to decide whether or not I want to send my phone in (which just died yesterday) before or after LG figures out what is going on with my wifes. In both cases, the phones were running fine and just shut down by themselves. The battery was not dead. Each time, the phone will boot to the Google screen, but then immediate shut down. I can get in to recovery and do actions within there, so I do not believe it to be a battery issue. However, as soon as you attempt to boot the phone, it will die.

Were you guys using stock setups or custom ones?
Sent from my Nexus 5X using Tapatalk

Its a 'known' issue. Google has confirmed there is an issue. Only solution appears to be a warranty replacement.
https://productforums.google.com/forum/#!topic/nexus/r29mtzLFS0g;context-place=topicsearchin/nexus/nexus$205x$20bootloop
---------- Post added at 10:22 AM ---------- Previous post was at 10:21 AM ----------
Psychofrantics said:
Were you guys using stock setups or custom ones?
Sent from my Nexus 5X using Tapatalk
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Click to collapse
on both phones, bone stock. Only difference was I was running the beta before getting the stock OTA and my wife's was full stock and received the stock OTA.

I'm having the exact same problem here. Running Android 6.0.1, rooted. Phone suddenly turned off and won't start past the "Google" screen, except for once when it booted fully then immediately shut down, and three times when it loaded the boot animation and shut down. Bootloader is unlocked and TWRP recovery is installed. I can access fastboot but not recovery. I've tried the suggestion of booting into download mode then recovery again, but that didn't work. I have NOT tried updating to Android 7 yet, so this isn't the same boot loop issue faced by some other users. I don't want to try flashing stock yet and lose my data because I have a ton of Tasker profiles and tasks that I haven't backed up in months and I don't want to risk losing them! Serves me right...
Any suggestions?

Same HERE !!!!

the samed for me, and still now i can't light it up

sagshar said:
I'm having the exact same problem here. Running Android 6.0.1, rooted. Phone suddenly turned off and won't start past the "Google" screen, except for once when it booted fully then immediately shut down, and three times when it loaded the boot animation and shut down. Bootloader is unlocked and TWRP recovery is installed. I can access fastboot but not recovery. I've tried the suggestion of booting into download mode then recovery again, but that didn't work. I have NOT tried updating to Android 7 yet, so this isn't the same boot loop issue faced by some other users. I don't want to try flashing stock yet and lose my data because I have a ton of Tasker profiles and tasks that I haven't backed up in months and I don't want to risk losing them! Serves me right...
Any suggestions?
Click to expand...
Click to collapse
In my opinion your EMMC probably died, but you can try reflashing factory images to see if it is some other problem.
I would only try LGUP as a last resort because it will set Allow OEM unlocking to false and lock your bootloader, making further experimentation difficult.
BTW IMO the Android 7 bootloop probably isn't related to Android 7. I think they are just saying hardware problem (EMMC failure) that happens to show up more frequently when you have large updates of OS.
The way Google worded it, it made it seem like Android 7 is killing some hardware because of some incompatibility with just some isolated hardware builds.
I would suggest you let it keep booting and flash some factory images and sometimes EMMC will come back briefly and boot. If it does, immediately backup as much as you can before doing anything else.

Same deal for me and they are sending a replacement. This is a MAJOR blackeye!

Is your phone under warranty then? I am having the same problem as everyone on here. I've tried everything. I bought the phone just over a year ago though, so am a little concerned Google will turn around and tell me it's not their problem... Even though this is clearly a fault!

LG G3 D855 Stuck in Weird Bootloop...

Hey! Check the bottom for TLDR.
I have had my G3 since they came out (have the 2GB, 16GB RAM version), and even got the G4, but remained with the G3 since it didn't have any issues with rooting and recoveries...
Anyways, I was talking to my brother on WhatsApp yesterday and ended up checking out my Hangouts messages at the same time. I believe I accidentally hit the camera feature on Hangouts, and then everything froze. I could still talk to my brother, but I could not get to the home screen or even change from looking at Hangouts. I turned off the screen in hopes that I could get back in, but when I turned the screen back on, I could not log into the phone (I do not have a pin or password, it has no lock at all).
After a few more minutes talking to my brother, it suddenly shut off. When I tried to turn it on it went into a bootloop where the front light changes different colors, and the LG logo continues to show that shine going around the logo.
I was able to get into download mode and went ahead and tried to flash a KDZ as per instructions (I have done this in the past). The install would complete and the phone would give the prompt about updating all the apps. Once that was done, it would show the LG logo and again for about ten minutes. Afterwards, it would get stuck in updating all the apps again and performing the same process...
I also tried using the LG PC Suite and trying to "Restore upgrade errors", but every time I would click that option, I would get a Windows error that something happened and close out the program (it never recognized the phone). I then used the LG Mobile Support Tool, which allowed me to perform an update for the firmware. It too completed, but then went back into the process of updating apps, showing the LG logo, then looping.
The final thing I tried was doing a Factory Reset. I was able to get to the area, and when selecting yes, it immediately went to the LG logo and "Life's Good" sign, which it would never get passed. This is also what happens when I try to turn on the phone and wait.
I contacted LG, which was pointless, as I expected. They wanted me to go to a local repair shop, which is of no use to me if they can only perform the same things I have done.
TLDR: My phone can get into download mode and the Factory Reset area, but flashing stock firmware, or performing the Factory Reset, still leads me into one of two bootloop situations. LG PC Suite and LG Mobile Support Tool seem to be of no use.
Does anyone have any suggestions? Is there anything I can try that I haven't?
Thanks in advance!

LucidPhusion said:
Hey! Check the bottom for TLDR.
I have had my G3 since they came out (have the 2GB, 16GB RAM version), and even got the G4, but remained with the G3 since it didn't have any issues with rooting and recoveries...
Anyways, I was talking to my brother on WhatsApp yesterday and ended up checking out my Hangouts messages at the same time. I believe I accidentally hit the camera feature on Hangouts, and then everything froze. I could still talk to my brother, but I could not get to the home screen or even change from looking at Hangouts. I turned off the screen in hopes that I could get back in, but when I turned the screen back on, I could not log into the phone (I do not have a pin or password, it has no lock at all).
After a few more minutes talking to my brother, it suddenly shut off. When I tried to turn it on it went into a bootloop where the front light changes different colors, and the LG logo continues to show that shine going around the logo.
I was able to get into download mode and went ahead and tried to flash a KDZ as per instructions (I have done this in the past). The install would complete and the phone would give the prompt about updating all the apps. Once that was done, it would show the LG logo and again for about ten minutes. Afterwards, it would get stuck in updating all the apps again and performing the same process...
I also tried using the LG PC Suite and trying to "Restore upgrade errors", but every time I would click that option, I would get a Windows error that something happened and close out the program (it never recognized the phone). I then used the LG Mobile Support Tool, which allowed me to perform an update for the firmware. It too completed, but then went back into the process of updating apps, showing the LG logo, then looping.
The final thing I tried was doing a Factory Reset. I was able to get to the area, and when selecting yes, it immediately went to the LG logo and "Life's Good" sign, which it would never get passed. This is also what happens when I try to turn on the phone and wait.
I contacted LG, which was pointless, as I expected. They wanted me to go to a local repair shop, which is of no use to me if they can only perform the same things I have done.
TLDR: My phone can get into download mode and the Factory Reset area, but flashing stock firmware, or performing the Factory Reset, still leads me into one of two bootloop situations. LG PC Suite and LG Mobile Support Tool seem to be of no use.
Does anyone have any suggestions? Is there anything I can try that I haven't?
Thanks in advance!
Click to expand...
Click to collapse
I had the same issue about two weeks ago...tried everything with no success.....
I send my device to LG reparation center...a week ago
Still waiting for an answer...
Probably battery powering issue or motherboard.....

Have u tried LG Up?

opened the phone removed the motherboard and gave a heat blow using a hair dryer on my blue screened LG G3. worked since then no reboots or blue screen. dont know for how long though. try that maibe might work for you

[Q] Bricked LG G3

Hello guys,
2 days ago my phone randomly bricked itself. It wasn't rooted or anything, everything on it was stock (I've been using it for 2 years).
Before the brick, I had the screen flickering issue, my WiFi stopped working and the sound also (this happened during a period of 2 months) - during this period my battery started draining very fast, I could use the phone for max 2 hours per day (stand-by or use, doesn't matter).
So 2 days ago I ran out of battery and left the phone to charge during the night. When I woke up, I tried to turn the phone on but at first It got stuck at the PIN insertion, and after rebooting it twice it just got stuck in a boot loop.
So what I did was follow the TOT guide and tried to flash a stock rom. All went well until I tried to do a factory reset before initial boot - I got a kernel crash and my phone is unable to enter download mode since this moment (the loading screen shows up, and once it loads the screen goes black and my phone is recognized as qualcomm. etc).
At this moment I found about BoardDiag and used the software in order to try to repair my phone. Everything works well with BoardDiag, but once it finishes it's job reboots, I get kernel crashes yet again and I am still unable to enter download mode (It's like the program didn't do anything and the phone just reverts itself to It's previous state).
So is this a hardware issue or am I doing something wrong?

Anyone?

http://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359
this is the best method so far.

replace your battery as known to cause corruption boot problems when dying
Also try this..... download LG mobile support tool and install + run, ignore start upgrade > battery out > battery in (dont power on) USB cable in pc not phone > hold volume up plug in usb to phone, you will get download mode in blue in box on phone > now on pc > LG mobile support tool > choose options then UPGRADE RECOVERY. will take 57+ mins to complete (over 1 hour) it might seem stuck frozen at 10% to 22% it's not just wait it out...

Jahanzaibawan said:
http://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359
this is the best method so far.
Click to expand...
Click to collapse
As I said in the thread, I've already tried this but when the phone reboots and when I try to enter download mode again the phone is not being recognized again.