Develop Bugs

Did I just BRICK my G Nexus?

So, last night I was out and about - just having a good time. Noticed that the battery on my GSM Galaxy Nexus was getting low. Went "Meh, wasn't the first time it's died." It got to 1% battery power and shut-off, like it normally does. Me being who I am, I turned it back on to see just how much more juice I could get out of it.
Phone booted up alright. Finished the boot animation, and then a couple seconds later turned off.. not a big deal. I get home, plug it in, and the charge screens cycle..... and then they cycle again. And again. And again. Basically just looping. I turn the phone ON, finishes the boot animation and... turns off again riight away? Goes back to the charge screen loop.
I'm not talking about the regular charge screen. After the battery gets 'filled' twice, it completely restarts. Black screen for 2 or so seconds, and then it goes through the charge animations as it would if you had just pluggied it in. I CAN get into bootloader, but that's about it. I'm just curious.. has anyone seen this before? Or know what my problem might be?
I'm unable to turn USB Debugging on in the system settings, so I'm at a loss as to how I can fix this issue WITHOUT bringing it into Bell.

Try going into recovery and wiping cache and dalvik. If that doesn't work reflash your rom

My phone is completely stock (I reflashed it to to the stock yakju? I believe it was when I found out Samsung had screwed people off the google update path.. so I can't get into recovery mode. It just shows the broken android. It's all been re-locked, and since then, my laptop has died. So I no longer have the ABD/Samsung drivers setup. Which was a pain to get going the first time..

i.vt3c.d0hc said:
My phone is completely stock (I reflashed it to to the stock yakju? I believe it was when I found out Samsung had screwed people off the google update path.. so I can't get into recovery mode. It just shows the broken android. It's all been re-locked, and since then, my laptop has died. So I no longer have the ABD/Samsung drivers setup. Which was a pain to get going the first time..
Click to expand...
Click to collapse
The "Broken android" IS stock recovery. I believe that when you push Volume Up seeing that image it takes you to the stock recovery menu. But you can always reflash Yakju or any other ROM through fastboot mode (see the tutorials here on the forum).

i.vt3c.d0hc said:
[snip]
I get home, plug it in, and the charge screens cycle..... and then they cycle again. And again. And again. Basically just looping. I turn the phone ON, finishes the boot animation and... turns off again riight away? Goes back to the charge screen loop.
Click to expand...
Click to collapse
Turn it off. Leave it charging for a few hours before turning it on.
i.vt3c.d0hc said:
[snip] I'm unable to turn USB Debugging on in the system settings, so I'm at a loss as to how I can fix this issue WITHOUT bringing it into Bell.
Click to expand...
Click to collapse
You do not need to have USB debugging enabled to use fastboot.
i.vt3c.d0hc said:
My phone is completely stock (I reflashed it to to the stock yakju? I believe it was when I found out Samsung had screwed people off the google update path.. so I can't get into recovery mode. It just shows the broken android. It's all been re-locked, and since then, my laptop has died. So I no longer have the ABD/Samsung drivers setup. Which was a pain to get going the first time..
Click to expand...
Click to collapse
It doesn't take long at all to install the drivers. Look for a thread with "universal" in the title. I think it is in GN General. Once you do install the fastboot driver, download the fastboot.exe file and reflash the stock ROM.
Diger36 said:
The "Broken android" IS stock recovery. I believe that when you push Volume Up seeing that image it takes you to the stock recovery menu. But you can always reflash Yakju or any other ROM through fastboot mode (see the tutorials here on the forum).
Click to expand...
Click to collapse
It's volume up and the power button.
Sent from my Galaxy Nexus using Tapatalk

The problem I have is that the charge animation doesn't change... i.e. It'll constantly refill the battery and all, but it always starts from the bottom (While when a phone is say... half charged, the little battery is half filled and the animation continues.
I'm not sure it's even charging at all.

Update time!
Got it into the stock recovery. Wiped the cache and all of my data. Rebooted, and.... it turns on! No longer reboots on regular startup. That's the good news. So at least it's somewhat useable now..
Now for the BAD news.
-It still does that retarded charging bootloop that doesn't seem to get me anywhere
-....When it's on. Like, running, it doesn't charge. Nadda. Zip. Zilch. Computer, wall charger, android dock, nothing. It just won't charge when it's on. However when I got it to power on, it said I had 14% remaining - which means it was likely charging inside the Bootloader, as I had it on that for quite a bit.
I think this just went from a software to a hardware issue. Thoughts?

i.vt3c.d0hc said:
Update time!
Got it into the stock recovery. Wiped the cache and all of my data. Rebooted, and.... it turns on! No longer reboots on regular startup. That's the good news. So at least it's somewhat useable now..
Now for the BAD news.
-It still does that retarded charging bootloop that doesn't seem to get me anywhere
-....When it's on. Like, running, it doesn't charge. Nadda. Zip. Zilch. Computer, wall charger, android dock, nothing. It just won't charge when it's on. However when I got it to power on, it said I had 14% remaining - which means it was likely charging inside the Bootloader, as I had it on that for quite a bit.
I think this just went from a software to a hardware issue. Thoughts?
Click to expand...
Click to collapse
Power down phone, do a long battery pull, place it inside again, let it charge for a few hours without powering it on, when it is fully charged (or after a few hours) pull battery again and then take charger out the phone. After a few minutes, place battery inside phone again and start it up without the charger.
Hope that works.
Sent from my Galaxy Nexus using xda premium

And that might fix this charging bootloop? Because the LCD doesn't even turn off..

i.vt3c.d0hc said:
And that might fix this charging bootloop? Because the LCD doesn't even turn off..
Click to expand...
Click to collapse
You could always try a new battery
Sent from my Galaxy Nexus using xda premium

+1 for the new battery thought.

Battery test
I am having a similar problem, I get the boot loop.
Difference is that I had started with a new battery so that could be your problem or unrelated. I went to a mobile shop yesterday and they let me use a new battery to see if the loop would start. It did not so there seems to be at least one other failure path. I have avoided a factory reset as I was hoping to pull some pictures but coming to the realization that I will have to try factory reset as a last resort
I posted to this thread #192
http://forum.xda-developers.com/showthread.php?t=1490815
My Galaxy Nexus phone from WIND went into a reboot loop yesterday. It had been charged to 98%, used to make a call and then put away. Wireless was enabled. Noticed vibration periodically and say it was rebooting every 6 - 7 seconds. Pulled battery to stop reboot. Saw references to fully charged battery via USB stops reboot loop so tried that. Battery voltage was 4.17V and still went into reboot loop.
Tried to boot into safe mode but still goes into a loop
I went into recovery mode and tried all options but factory reset because I am hoping to recover some pictures
reboot system now
apply update from cache (but did not have an update to install as only options were ../ lost+found/ recovery and when I selected these was in a loop as well)
wipe cache partition
Can't tell what version of Andorid I have as the phone never finishes booting.
Boot console gives the following information
Product Name – tuna
Variant – maguro
HW version – 9
Bootloader version – PRIMEKK14
Baseband version – I9250UGKL1
Have installed SMS backup because I was planning to do a backup after a trip. Also have two GPS tracker apps installed.

GNMO15 said:
[snip]
I have avoided a factory reset as I was hoping to pull some pictures but coming to the realization that I will have to try factory reset as a last resort
Click to expand...
Click to collapse
If you can boot into recovery, you may be able to get your pictures off your device.
1) Make sure you have the drivers for your device properly installed on your computer.
2) Download the attachment and unzip it to a directory on your computer.
3) Open a command prompt in the same directory.
4) Reboot your device into recovery and plug into your computer.
5) Make sure your computer sees your device by typing: adb devices
6) Pull the data off your device by typing: adb pull /data/media
Note: depending on how much data you had on /sdcard, this could take a while, so be patient.

[Q] Samsung Note N7100 stuck boot loop when unplug,but when charging loads the KitKat

Hi Guys,
've flash my Samsung Galaxy Note 2 N7100 to 4.4.2 KitKat it was successful, but after a few days my note 2 keeps auto shutting down randomly and sometimes I can't turn it on from sleep. I thought I've just missed something when flashing to 4.4.2 KitKat, what I did was to re-flash it and check if I've missed something but not. After I re-flash it, I've encountered this problem. I'm stuck at boot loop, I've done the Wipe process it was successful, but it didn't fix the problem, what I've noticed is when it's NOT charging or plug to PC it is stuck at boot loop, but when I plugged it to PC or charge it it continues loading the KitKat, sometimes prompting that it's not charging.
I'm wondering what could be the problem here. I've google any possible problem, I can't find any similar problem to mine. Can anyone help?
I'm still try any possible way to fix... HELP!

Dennis_Arlo said:
Hi Guys,
've flash my Samsung Galaxy Note 2 N7100 to 4.4.2 KitKat it was successful, but after a few days my note 2 keeps auto shutting down randomly and sometimes I can't turn it on from sleep. I thought I've just missed something when flashing to 4.4.2 KitKat, what I did was to re-flash it and check if I've missed something but not. After I re-flash it, I've encountered this problem. I'm stuck at boot loop, I've done the Wipe process it was successful, but it didn't fix the problem, what I've noticed is when it's NOT charging or plug to PC it is stuck at boot loop, but when I plugged it to PC or charge it it continues loading the KitKat, sometimes prompting that it's not charging.
I'm wondering what could be the problem here. I've google any possible problem, I can't find any similar problem to mine. Can anyone help?
I'm still try any possible way to fix... HELP!
Click to expand...
Click to collapse
Ive just encountered the same problem. Were u able to find a solution?

Shahin7631 said:
Ive just encountered the same problem. Were u able to find a solution?
Click to expand...
Click to collapse
I exactly encounter the same issue on my Note II. It seems that the automatic reboot (then the boot loop) when the phone is unplugged is generated with apps (or system) using internet connection or the camera.
Please help ! :crying:

Dennis_Arlo said:
Hi Guys,
've flash my Samsung Galaxy Note 2 N7100 to 4.4.2 KitKat it was successful, but after a few days my note 2 keeps auto shutting down randomly and sometimes I can't turn it on from sleep. I thought I've just missed something when flashing to 4.4.2 KitKat, what I did was to re-flash it and check if I've missed something but not. After I re-flash it, I've encountered this problem. I'm stuck at boot loop, I've done the Wipe process it was successful, but it didn't fix the problem, what I've noticed is when it's NOT charging or plug to PC it is stuck at boot loop, but when I plugged it to PC or charge it it continues loading the KitKat, sometimes prompting that it's not charging.
I'm wondering what could be the problem here. I've google any possible problem, I can't find any similar problem to mine. Can anyone help?
I'm still try any possible way to fix... HELP!
Click to expand...
Click to collapse
I had a similar problem with my note 2 N7100.
It used to reboot every 30 minutes.
The best solution was to reinstall the firmware using ODIN.
First you need to download the firmware from sammobile and put the phone in download mode and install it.
Hope this solution helps you too.

anish100 said:
I had a similar problem with my note 2 N7100.
It used to reboot every 30 minutes.
The best solution was to reinstall the firmware using ODIN.
First you need to download the firmware from sammobile and put the phone in download mode and install it.
Hope this solution helps you too.
Click to expand...
Click to collapse
Thank you anish. I already tried this solution (with stock firmware and Cyanogenmod 10.3 &11) but it didn't work for me
The phone boot only happens when I unplug the USB cable and launch an app. If I do nothing after unplugging the cable the phone don't boot immediatly.

GStriker said:
Thank you anish. I already tried this solution (with stock firmware and Cyanogenmod 10.3 &11) but it didn't work for me
The phone boot only happens when I unplug the USB cable and launch an app. If I do nothing after unplugging the cable the phone don't boot immediatly.
Click to expand...
Click to collapse
Hi guys ! I finally found a temporary work around to avoid automatic reboot. After multiple tests I noticed that the issue seems to come from CPU usage.My phone never went to deep sleep and often stayed around 1600MHz.
The work around was to go to Preferences > Performances > Processor/CPU > Strategy select "userspace" . The CPU goes down to 800MHz but I don't have any more automatic reboot when the USB cable is unplugged.
After reboot the boot loop is still there (so I need to put back in the USB cable to boot normally). I was wondering if the boot loop comes from the boot.img file...

GStriker said:
I exactly encounter the same issue on my Note II. It seems that the automatic reboot (then the boot loop) when the phone is unplugged is generated with apps (or system) using internet connection or the camera.
Please help ! :crying:
Click to expand...
Click to collapse
Ive literally tried everything .even repartioned the phone . it works fine in recovery and download mode but as soon as i want too boot to android unplugged it restarts . when plugged it has no problem

Funny thing. I have a factory Sprint Note 2 with the latest kitkat updat and I am experiencing the same problem. Phone has not been rooted or messed with. If anybody come across a solution let me know. I booted the phone and unplugged the power button to verify and it does the same thing. Only stays on when in airplane mode or charging.
One more thing. I tried somewhat to do what was posted above about performance / cpu power. I put the phone in powersave mode and checked limit cpu and is is fully operation. problem gone. If I turn power save mode off I'm back to square one.
To late. Took a picture by mistake and phone jumped into boot loop.

i have GT-N7100 and same problem phone is stuck on boot loop when unpluged
---------- Post added at 04:22 PM ---------- Previous post was at 03:24 PM ----------
i just tought maybe it needs new battery. cause before i unpluged it it showed 67% then bootlooped 2x then i pluged back in and it shows me only 5%. i think its battery cause it cant dishcharge in 1 or 2min

My initial problems were that it would drop signal and show an x with no bars intermittently. then i started having problems anytime the phone demanded use. Picture, internet, video. tried a few things listed above. Still would go into a boot loop when not plugged in. Battery would charge normally and show it percentage like normal. It would reach 100% with no difference in charge time. When battery saver is on it would not have a problem unless I use an app that demands more cpu usage, network connection, battery consumption. Put a new battery and problem is gone. some people say the battery show swelling but my battery looks identical to the new one. no swelling and it is not deformed in any way.

It also solves the problem for me ...but i dont know what to do after the restart ...have u found a permenant solution

Shahin7631 said:
It also solves the problem for me ...but i dont know what to do after the restart ...have u found a permenant solution
Click to expand...
Click to collapse
I was thinking. If you flashed with a bad battery whats there to keep it from affecting the flash / update. The stock system doesn"t allow an update unless the battery is charged. It doesn't know if the battery is faulty. Try to reflash after a new battery has been reinstalled and charged to full. It's just a thought.

dcmobiletech said:
I was thinking. If you flashed with a bad battery whats there to keep it from affecting the flash / update. The stock system doesn"t allow an update unless the battery is charged. It doesn't know if the battery is faulty. Try to reflash after a new battery has been reinstalled and charged to full. It's just a thought.
Click to expand...
Click to collapse
Ive tried already with another battery ....its a very strange situation while everything works fine in download or recovery mode when its unplugged ...i have ordered a third party battery to see if it'll make a difference or not ....i'll keep u updated tomorrow

GStriker said:
Hi guys ! I finally found a temporary work around to avoid automatic reboot. After multiple tests I noticed that the issue seems to come from CPU usage.My phone never went to deep sleep and often stayed around 1600MHz.
The work around was to go to Preferences > Performances > Processor/CPU > Strategy select "userspace" . The CPU goes down to 800MHz but I don't have any more automatic reboot when the USB cable is unplugged.
After reboot the boot loop is still there (so I need to put back in the USB cable to boot normally). I was wondering if the boot loop comes from the boot.img file...
Click to expand...
Click to collapse
Where is the Preferences section? I am unable to find that on my Note 2 settings.

Experienced the same thing and this is the first time I had this. I was playing a game after I fully charged my battery and suddenly it turns off. So I waited for it to turn on where I noticed that it keeps on turning on and off and stuck on the " Samsung Galaxy Note 2" logo screen. Then I tried several things like clearing the cache and dalvik but it just do the same thing. I re-flashed the 4.4 ROM that I was using but sadly it does the same thing. I then noticed that if I plug in the charger it works normally and does not boot loop. And as soon as I remove the charger it will keep on restarting on and off on that screen. I was thinking that it might be a hardware failure or the battery itself. So I went to recovery mode and unplugged the charger, it stays on. Went to download mode without the charger and it stays on. Freakin' weird. I am about to flash a different ROM and will wipe everything and see what happens...

Fully charged the battery to 100%, unplugged the charger and it started to boot loop again. I allowed it to boot loop once and immediately went to recovery mode and saw that my fully charged battery went down to 3%. Tried different ROMS (Omega, DN3, and Phoenix), I still have this issue. Now can use my Note2 as long as the charger is plugged in...

Change your battery and solve the problem ?
Sent from my GT-N7100 using XDA Free mobile app

I did. Case closed!

red_hanks said:
I did. Case closed!
Click to expand...
Click to collapse
is it working fine after battery change? does it still get stuck in boot loop? mobile networks?

It works perfectly !

[Q] Random Reboot Leads to Bootloop from...

OK all I am sincerely reaching out as I am out of ideas. Here is the situation...
Issue : Last evening, running most recent Liquid Smooth 4.4 (Superb ROM, I don't feel this is really at fault just relevant and thorough), I had been doing some heavy tethering when I picked up my beast and stepped out for a smoke. As I am reading up on moto360's 2 1/2 hour sellout I get a random reboot. Eh, no biggy ... it does happen. (Not often, or at all to speak of in my case just stating.) Right after reboot I hit the power button to make a forced boot cycle and it rebooted again before I pressed anything on screen!
Now SOMETIMES I will boot past the initial "NOTE II" splash (NOT often at all ... usually get reboots, splash hangs, or the phone simply turns off on its own from here) If it does make it past Note II splash it will reboot, hang, or simply turn off from here as well.
Steps Taken: I firstly, attempted a restore... no dice. I attempted a fresh install (TW, SlimRom, and DU) ... no dice dos. OK hmmmm
Now to all mighty ODIN (L900VPUCNE2_L900SPTCNE2_1561791_REV04) .... NO FREAKING DICE!!! WTF?!?!? I additionally attempted MC2_STOCK_with_COUNT_RESET-20130511 ... no bueno!
I still have access to Recovery and Download soooooooo ... I lay down at the mercy of you the community!!!
Thanks in advance and if you need more info PLEASE don't be shy!

Same issue here!!!
After a random reboot, I have the same type issue!
Running an almost stock NE2 rom, random reboot then hanging at the Note2 bootscreen.
Like you, I can access download and PhilZ recovery.
I CANNOT flash through recovery. Errors out.
Odin flashes succeed but on reboot I still hang at the Note2 bootscreen.
My recovery is showing multiple error related to accessing E:, E:/cache, etc.
Are you having that issue as well??

Try this go to samsung-updates.com
search device l900 scroll to the very bottom of the list
download the L900VPUCNE2 zip (this is a pure sprint rom)
flash using ODIN3 v3.09
I have flashed this file many times and it works every time.
Hope this Helps.

Exact same thing
I've been running the latest nightlies of OmniRom. And yesterday, out of the blue, random reset then bootloop. No luck with anything, recovery, odin, etc.
Did Sprint deliberately brick our phones?
I'll try the odin to stock to see if I get any luck there. But if anyone else figures it out, it'd be nice to know the fix. Thanks!

No luck going back to stock. It's dead Jim.

I had a very similar issue. Try booting your phone with it plugged into the wall changer; something given the full 2amps of power. It it'll boot, it's possible your battery is bad.
If my case, my phone would boot loop around the splash screen. on the battery power only. I could go into recovery and download mode with no issues and stay on for hours. If I connected it to, say a PC, it would boot, but would random shut off within five minutes. But if I plugged into the wall charger, it would boot with no problems. Stay on for hours. If I plugged it from the charger, it would immediately shut off and try rebooting which it would just boot loop.
Luckily, the batteries are pretty cheap at $10 to $20 on Amazon. I went with the Anker for $15 to get me by till I get my next phone, which will probably be October; I'm heavily learning towards the Note 4

Replace the battery
I had the exact same issues. I ended up buying a $10 battery on amazon and it solved the problem. I did go through all the flashing, odin to stock, etc. All was pretty good when plugged in to a good power source. It took me about 4 hours of trial, error, reflashing, etc before I realized it was probably a battery issue. The new battery has solved the problem.

lovekeiiy said:
I had a very similar issue. Try booting your phone with it plugged into the wall changer; something given the full 2amps of power. It it'll boot, it's possible your battery is bad.
Click to expand...
Click to collapse
When I try to power the phone on while plugged to the charger. I see the battery graphic with a circle on it but the phone won't boot at all.
When the random reboot happened the phone WAS plugged into the charger and fully charged. Prior my problem, battery life had been excellent.
Do the batteries go bad instantly?

crackrock360 said:
After a random reboot, I have the same type issue!
Running an almost stock NE2 rom, random reboot then hanging at the Note2 bootscreen.
Like you, I can access download and PhilZ recovery.
I CANNOT flash through recovery. Errors out.
Odin flashes succeed but on reboot I still hang at the Note2 bootscreen.
My recovery is showing multiple error related to accessing E:, E:/cache, etc.
Are you having that issue as well??
Click to expand...
Click to collapse
I couldn't flash any of counter reset rom through anything but TWP so i have to boot into download and update away from Philz. AFTER the recovery update I started making headway. but couldn't ever seem to make it past boot no matter how much batter is charged. I was beginning to think it was something that died on the inside (heh...heh)
After reading through some of these greatly appreciated replies I am going to plug her up to the wall and try the ne2 counter reset again(12:58 am). ... AND I may go throw some cash at a battery juuuuuust in case. (I do tether 100gigs daily sooooooo it does make sense that it could have burnted up lmao!)
UPDATE 1:25AM : I did as advised and it does seem battery has taken a dive! hmmm so weird! It still shows having power and charging. But after being plugged into wall I made it booted into a fresh ODIN install!!! (keep in mind that AS SOON AS odin gave me a pass I switched to Wall outlet!) I have even performed a power cycle to confirm it wasn't a fluke! I will indeed be out first thing in the morn to get a new battery!
AGAIN I can not thank you all enough ... I would have never thought of that. (you would think it would be one of the first things but eh you live and learn.)
I will update with any new progress!
cheers!

crackrock360 said:
When I try to power the phone on while plugged to the charger. I see the battery graphic with a circle on it but the phone won't boot at all.
When the random reboot happened the phone WAS plugged into the charger and fully charged. Prior my problem, battery life had been excellent.
Do the batteries go bad instantly?
Click to expand...
Click to collapse
'When the random reboot happened the phone WAS plugged into the charger and fully charged. Prior my problem, battery life had been excellent.' EXACT CIRCUMSTANCES AS I SIR!!!
Mine does the same and hangs .... right? HIt the power button and as soon as it lights up to start to boot then plug in the power cable. (the freezing while off and charging is a known bug in at least two roms i believe)

Congrats Rubledub!
As for me, I'm still screwed. Invested $40 in a battery (had to have it today, couldn't wait on shipping)
With the new battery fully charged I still have the same result!

crackrock360 said:
,,, Do the batteries go bad instantly?
Click to expand...
Click to collapse
There were probably signs of the battery going bad, but misread. But in my experience, it went to total crap instantly.
The signs of going bad were shorter battery life, getting stuck/freezing when trying to charge the phone when off (there's that battery graphic that shows up). Unfortunately, I did all kids of other stuff before I really figured it out, and looks like a messed up my modem and now cannot connect to 3G. Kind of irritating, but luckily, I spend 75% of my time in LTE areas. Just got to ride this out till the Note 4 is released.
Here is thread of when I was having trouble: linky/URL]. It's a lot of me trying slightly different things with no changes in results. Plus, I was a buddy's house who was in a 3G only area. The worse part, my phone did this the day before I left to spend the weekend five hundred miles away from home at a friend's house to visit.

sloanmeister said:
Try this go to samsung-updates.com
search device l900 scroll to the very bottom of the list
download the L900VPUCNE2 zip (this is a pure sprint rom)
flash using ODIN3 v3.09
I have flashed this file many times and it works every time.
Hope this Helps.
Click to expand...
Click to collapse
Just chiming in to say this worked for me! Thanks!

Joelski144 said:
Just chiming in to say this worked for me! Thanks!
Click to expand...
Click to collapse
Oh i agree! Thats is what had me so baffled ... Not even the odin installs were breathing life, and Odin ALWAYS works for me. If Odin isnt getting it done and neither is a battery then your problem may be far more serious???

Weird Recovery Lag and bootlooping after CM12 update
Hey guys,
I came across this thread and the issues I'm having sound so what similar, so I thought you might be able to help.
I have two Samsung Note 2(l900) and running on cm12 as of yesterday morning. I installed the new nightly manually on both devices the same exact way by opening clockwork recovery and installing zip. One device was successful and is working just fine, the other seemed to flash fine until it had finished loading the apps and going into boot. The device would restart on the note 2 logo screen and then proceed to the cm12 boot screen and then restart after a few seconds. I went back into recovery which took longer than usual, and proceeded to clear partition, wipe dalvik cache, and install older nightlies. I had the same result no matter what nightly I went with.
I decided to set the device back to stock rom and root again. I it worked just fine, so I went through the process about 4 times installing different nightlies but had the same restarting results. It was then I noticed that getting in clockwork recovery manually lagged about 30 seconds. I took the advice of someone on the Google plus forum and switched the recovery from clockwork to twrp. Tried again with the same restarting results and with the manual recovery lagging about 30 seconds to get into.
I'm back on stock rom and the device is working great but takes forever to get into manual recovery which I believe is why it is having issues booting Cm 12

D855 Stuck in Bootloop-- Light Sensor and Vibration Still Work

I'm having a weird problem. Yesterday I was using my phone as I normally do-- texting, playing simple puzzle games, etc.-- when I noticed the battery was at about 2%. I wasn't very concerned so I tried to send one last text before it died. Shortly afterward it died with the usual "Powering Down" alert. I thought absolutely nothing of it and once I had access to a charger, I did what I normally do: I turn on my phone, wait for it to get past the LG splash screen, and I plug it in once it gets to the boot animation. I do this so my phone will turn on instead of going into charge only mode. Also, like usual, my phone's screen dimmed seconds after the boot animation began (I assume from my automatic light sensor settings), and I could feel it vibrating a little (also something it typically does upon boot).
However this is as far as it got. I was very confused when about an hour later, the phone still hadn't completed boot. I removed the battery, inserted it again, and tried once more telling myself that I would wait as long as I could instead of just an hour. Booting the second time gave me identical results-- everything is normal (light sensor response and vibration indicating the phone is powering on) yet it gets stuck. The only difference is that this time I got to see the entire bootloop.
After the boot animation screen has run for a while, I get the usual "Android is starting.... Optimizing app ## of ##" (#= actual numbers). Once it finishes, instead of booting my phone, it begins the boot animation again. If left alone it will cycle between the boot animation and the "Android is Starting" screen indefinitely.
TL;DR:
1. ) Caught in bootloop between boot animation screen and "Android is Starting... Optimizing app ## of ##" screen.
2. ) The screen still dims and there are little vibrations that usually tell me the phone is about to turn on.
I have tried:
- a hard reset- this yields only a slightly stronger vibration and it starts the bootloop again.
- Download mode- this does the same as the hard reset
- Removing battery for a while- no results
- Full charge to completely dead to full charge again on charge only mode- no results
I am running CM13 Nightlies from late February (not completely sure which exact date). Which I flashed without issue about a month ago. I do have Xposed and run various modules, but I was using nothing at the time and hadn't for about a month. My computer recognizes my phone as an LG G3 Device, but refuses to access any files.
Any help would be greatly appreciated!!

Phone not starting.
First remove phone battery, insert it again, do not start phone. Connect your phone to original charger and charge it, while charging with the charger start your phone. Your phone should start if yes/no report me immediately. Your phone battery is failing to start your phone (Due to Low Voltage in battery). Replace with original battery.

jit1108 said:
First remove phone battery, insert it again, do not start phone. Connect your phone to original charger and charge it, while charging with the charger start your phone. Your phone should start if yes/no report me immediately. Your phone battery is failing to start your phone (Due to Low Voltage in battery). Replace with original battery.
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Click to collapse
Alright, I removed the battery, reinserted it (without turning the phone on) plugged it into the wall charger (seeing the charge only battery animation), and attempted to turn it on. Whenever I try to turn my phone on after plugging it in, I get the LG splash screen followed by the battery charging animation. It never reaches the boot animation. I'll let it charge for a while and try again.
Thank you for the advice!

Okay, I let the phone charge completely and attempted to turn it on whilst plugged into the wall charger again. Unfortunately I had the same issue. The phone shows the LG splash screen and then the battery charging animation again-- no boot animation.

musiceas66 said:
Okay, I let the phone charge completely and attempted to turn it on whilst plugged into the wall charger again. Unfortunately I had the same issue. The phone shows the LG splash screen and then the battery charging animation again-- no boot animation.
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Click to collapse
just start with a full reflash , if it doesnt boot up its simply broken

Jhinta said:
just start with a full reflash , if it doesnt boot up its simply broken
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Click to collapse
Yeah, I'm trying to avoid a full reflash/data wipe. Since I haven't messed around with any Xposed modules or root apps, I also haven't backed up anything for quite a while. No abnormal apps were running before the battery died, which leads me to believe this can be solved somehow without a full wipe.
Also, I tried to use my boyfriend's battery to boot up my phone. I thought it might be a bad battery-- as some people on-line have mentioned. Unfortunately, it still refused to boot and it produced the same bootloop.

You see , if and not and this and that dont help . te only way to save files is to get acces by recovery or boot, you cant boot but possible you have recovery so start saving your files you need. when you have or dont have your files . you stil need your system to boot for that to happen, it needs to work. so flashing a default rom with wipe sould work if it doesnt you flash original if that doesnt work its dead
Verstuurd vanaf mijn LG-D855 met Tapatalk

I think I forgot to mention, I cannot access recovery mode. I have the latest TWRP installed, but attempting to boot into recovery gives me the same results-- endless bootanimation/ "Android is Starting" bootloop.

So no acces at all . so what do you do ? Read above! Anyway good luck
Verstuurd vanaf mijn LG-D855 met Tapatalk

Solved
I fixed my problem. It turns out I was being an idiot and got the method of entering recovery mode on the LG G3 confused with my Samsung tablet. I should be able to fix the bootloop on my own now. Thanks everyone for your help! Cheers to idiocy.

Hey, I have the exact same issue right now. Did you solve your problem, and how? I tried removing the battery and charging with original charger to 100%. I connected it to my PC, went into Download mode and clicked "Restore Upgrade Errors" in LG PC Suite. It successfully flashed the firmware update, then it said "Android is starting.... Optimizing app ## of ##". But after that it restarted into bootlop again. Also I noticed that sometimes it vibrates, and my LED (light sensor) doesn't light up anymore.
Any advice? I haven't tried replacing the battery yet.

simon710 said:
Hey, I have the exact same issue right now. Did you solve your problem, and how? I tried removing the battery and charging with original charger to 100%. I connected it to my PC, went into Download mode and clicked "Restore Upgrade Errors" in LG PC Suite. It successfully flashed the firmware update, then it said "Android is starting.... Optimizing app ## of ##". But after that it restarted into bootlop again. Also I noticed that sometimes it vibrates, and my LED (light sensor) doesn't light up anymore.
Any advice? I haven't tried replacing the battery yet.
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Click to collapse
Hi i have the same problem with my lg g3 d855, after a reflash hi is start and do android optimazig after the tel is start and do this over and over. help please

Hi, the solution that worked for me was to
1. install drivers
2.install LGUP
3.flash "LGD855P_D855P10a_04" - found here https://drive.google.com/file/d/18tlmVNK_ba0jIapJy-Sz5wamxbIXh8xH/view

Bootlooped LG G3

Hi guys,
So yesterday my phone randomly started turning itself off every now and then. As time went by, it happened more and more until it never turned on. So what I'm left with now is a "LG Lifes good" screen, then black screen, then "LG lifes good" again. So I thought I'd boot to TWRP and restore an old backup. At 1% completion, the phone simply went back into the bootloop. After this, I wiped through TWRP, tried to uninstall xposed, did everything i could to no avail. So I thought I'd wipe it back to factory with my laptop. So yeah yeah got the KDZ, used LG Flash Tool 2014, installed the drivers etc and proceeded to wipe it. It didnt work on my windows 8 laptop so i went to my windows 7 desktop. This completed to 100%. My phone got the the language settings then went back into bootloop. I've tried to wipe again but it never completes. What can I do.
All help is greatly appreciated!!!

420blazed said:
Hi guys,
So yesterday my phone randomly started turning itself off every now and then. As time went by, it happened more and more until it never turned on. So what I'm left with now is a "LG Lifes good" screen, then black screen, then "LG lifes good" again. So I thought I'd boot to TWRP and restore an old backup. At 1% completion, the phone simply went back into the bootloop. After this, I wiped through TWRP, tried to uninstall xposed, did everything i could to no avail. So I thought I'd wipe it back to factory with my laptop. So yeah yeah got the KDZ, used LG Flash Tool 2014, installed the drivers etc and proceeded to wipe it. It didnt work on my windows 8 laptop so i went to my windows 7 desktop. This completed to 100%. My phone got the the language settings then went back into bootloop. I've tried to wipe again but it never completes. What can I do.
All help is greatly appreciated!!!
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Click to collapse
It's your battery.I have had the same problem and replacing the battery with a new one got the phone into function.

Sotiris02 said:
It's your battery.I have had the same problem and replacing the battery with a new one got the phone into function.
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Click to collapse
Are you absolutely sure?? I let it charge overnight and when i turned it on in the morning (while still plugged in), it worked. After unplugging, it immediately turned off.
I really don't want to buy a battery and then find that it wasn't the problem.
Thanks heaps for your reply!!

update
So I can use my phone normally when it's plugged in. However, even when I power off the phone, I get the flashing LG logo and it won't turn off. What might the problem be?

420blazed said:
So I can use my phone normally when it's plugged in. However, even when I power off the phone, I get the flashing LG logo and it won't turn off. What might the problem be?
Click to expand...
Click to collapse
As i mentioned it's your battery.
Even if you over charge it,empty it while you are on TWRP and recharge it,your battery won't work like it supposed to.
Before two months or so,i got this problem(same as you)
I tried charging it all day,emptying it via TWRP(took me about 3hours+ with full brightness to empty it)and recharged it.After that i booted it (while plugged in) and after it booted,i used it about some seconds without the charger and it started again bootlooping.
So i decided to buy a new battery,bought it,removed the old one and inserted the new one,and it worked better than the factory one.
I Hope that my little story helps.
Greetings.

Sotiris02 said:
As i mentioned it's your battery.
Even if you over charge it,empty it while you are on TWRP and recharge it,your battery won't work like it supposed to.
Before two months or so,i got this problem(same as you)
I tried charging it all day,emptying it via TWRP(took me about 3hours+ with full brightness to empty it)and recharged it.After that i booted it (while plugged in) and after it booted,i used it about some seconds without the charger and it started again bootlooping.
So i decided to buy a new battery,bought it,removed the old one and inserted the new one,and it worked better than the factory one.
I Hope that my little story helps.
Greetings.
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Click to collapse
ok thanks so much!