Develop Bugs

Nexus 7 wont turn on (Help desperately needed!!!)

Well im in a bit of a predicament, my Tab died while my cousin was using it and now ive put it on charge for 30 mins and it wont get past the flashing x boot screen googled it and noticed someone else has the same issue, is it common? any help?

You should be able to download and reflash the rom if needed but not sure if you have too.
What was your friend doing to it? Was he trying to unlock and root, etc?
Will it sync to your PC?
Sent from my Nexus 4 using xda app-developers app

Last night I had a similar issue, it won't pass the initial Google logo.
I just held the power button down for a while, and it turned off, then I powered it on again and everything was fine.
It happened after I tried a bunch of apps and decided to restart it.

Richieboy67 said:
You should be able to download and reflash the rom if needed but not sure if you have too.
What was your friend doing to it? Was he trying to unlock and root, etc?
Will it sync to your PC?
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
They were just watching YouTube videos then the tab ran out of juice, I can use bootloader fastboot ect but I'm in America atm and I'm leaving for England tomorrow morning so I don't have drivers or anything so I'm going to have to find all that again, with reflashing the Rom void my warranty in any way?
Sent from my HTC One X using xda premium

pacman1891 said:
Last night I had a similar issue, it won't pass the initial Google logo.
I just held the power button down for a while, and it turned off, then I powered it on again and everything was fine.
It happened after I tried a bunch of apps and decided to restart it.
Click to expand...
Click to collapse
My won't get past the flashing x at all, rebooted several times, charged it, everything but it won't turn on
Sent from my HTC One X using xda premium

I am guessing it's related to the letting the battery run out of juice.
Charging a completely dead lithium battery may take much longer time. For several times I have to plugin and wait half hour to several hours before the battery even start charging, of course those were on other devices, but I think it should be common among all such batteries. May be the battery hasn't been charged at all.
Since you are still in US, I would suggest take it back for a exchange, whatever the reason, the device should be considered faulty. If you brought it on Amazon then just return and mail it out before you leave.

fixed it by resetting the device in recovery, all works fine now, found a dead pixel now not going to risk returning it now, device is working fine

Seems like it's a 4.3 issue
Sent from my HTC One X using xda premium

[Q] "Invalid Battery, Phone Shutting Down"

I am now receiving the following battery error message, " Invalid Battery, Phone Shutting Down" Someone please help me out I love this phone but it is useless now! This error has started since KitKat Update was applied!

What kind of battery are you using?

mugenbatteriesOwner said:
What kind of battery are you using?
Click to expand...
Click to collapse
I am using the manufacture shipped battery...

high temperature ?

donniespafford said:
I am using the manufacture shipped battery...
Click to expand...
Click to collapse
Try reinstalling stock kitkat. There's a thread by @hyelton explaining how to do it.
If that doesn't solve it. I strongly advise you to take it to a lg service center.
There might be a problem with the connectors.
Sent from my LG-E980 using XDA Premium 4 mobile app

g0at1 said:
Try reinstalling stock kitkat. There's a thread by @hyelton explaining how to do it.
If that doesn't solve it. I strongly advise you to take it to a lg service center.
There might be a problem with the connectors.
Sent from my LG-E980 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
The only issue is this is OTA update that I am referring to as being applied... No custom ROMs or flashing has been done...

Try replacing battery and test it on site, as some batteries seems better than others. Had same issue with mine and changed the battery, now its resolved.

Cleanup battery contacts, both on battery and device. if it still reports same error, replace it, it's probably damaged.
I battery with missing thermal sensor (spare replacement bought online), phone reported it as "cold" and "Invalid" and didn't want to boot unless I force it (start booting it to recovery then instead of pressing necessary button, just leave it, not sure if that will work for stock).

[Q] G3 persistent rebooting issue HELP!

Hey guys im hoping to see if anyone can find a solution to this annoying problem i am having with my phone rebooting on me in the middle of using it. The phone would reboot once in a while and i never thought much of it, but recently(this past week) its been happening way too much. Im using my phone and then it reboots, but it goes into somewhat boot loop. it restarts anywhere from 1 time if i am lucky to around 10 times! once i get it to stop rebooting i use it a bit and it reboots on me again! This was happening in the stock LG OS and i got annoyed and flashed a lollipop rom and its still happening but it only reboots once. However if i start using it it reboots. The phone is becomeing essentially unusable!!! I then started to notice that if i am connected to the charger my phone does not reboot at all! no problem what so ever!
Any ideas of what i should do?
Is this happening to anyone else too?
I was thinking about unrooting it through TWRP and then upgrading it to the latest stock OS but i dont want to unroot it if i dont NEED to.. Any input is greatly appreciated

EduardoZ714 said:
Hey guys im hoping to see if anyone can find a solution to this annoying problem i am having with my phone rebooting on me in the middle of using it. The phone would reboot once in a while and i never thought much of it, but recently(this past week) its been happening way too much. Im using my phone and then it reboots, but it goes into somewhat boot loop. it restarts anywhere from 1 time if i am lucky to around 10 times! once i get it to stop rebooting i use it a bit and it reboots on me again! This was happening in the stock LG OS and i got annoyed and flashed a lollipop rom and its still happening but it only reboots once. However if i start using it it reboots. The phone is becomeing essentially unusable!!! I then started to notice that if i am connected to the charger my phone does not reboot at all! no problem what so ever!
Any ideas of what i should do?
Is this happening to anyone else too?
I was thinking about unrooting it through TWRP and then upgrading it to the latest stock OS but i dont want to unroot it if i dont NEED to.. Any input is greatly appreciated
Click to expand...
Click to collapse
i know my opinion might sound stupid but did you try a new battery?since you mention that the phone do not reboot if is connected to the charger maybe you found the problem yourself

brigantti said:
i know my opinion might sound stupid but did you try a new battery?since you mention that the phone do not reboot if is connected to the charger maybe you found the problem yourself
Click to expand...
Click to collapse
I haven't, i was thinking about that too but i am not sure if a battery can cause a boot loop? There is another guy thst posted a question similar to this in the LG G3 thread and he also says the phone does not reboot if its charging
I'd also rather not cough up $20 on a battery if i dont need it #brokecollegestudent haha
[EDIT]- Also my battery seems to be lasting me about the same i am about to go back to stock and not download any apps and see what happens

Similar issue
i had a similar issue after installing the new stock lollipop rom via twrp
it was rebooting on me every 10 minutes or so, and obviously that rebooting was killing the battery.
I had to just pull the battery and fix it.
Their may be a less drastic way to fix it. but I fixed mine by going back to stock completely.
I flashed stock via the ToT method and then upgraded to lollipop via the kbz method.
Fixed my phone, it's now working perfectly and I'm very good battery life again
Given that you mentioned twrp and lollipop I'm willing to bet we had a very similar issue
unrooting is a hassle, but at least it's free unlike buying a new battery

same issue - fixed with new battery
I had rve same issue where it rebooted randomly then after a few days just went into a boot loop. However it worked fine while plugged in. The guy in the shop said it was software related but i went ahead and ordered a new battery from amazon and now the phone is working perfectly.

rjvc68 said:
I had rve same issue where it rebooted randomly then after a few days just went into a boot loop. However it worked fine while plugged in. The guy in the shop said it was software related but i went ahead and ordered a new battery from amazon and now the phone is working perfectly.
Click to expand...
Click to collapse
did you order the anker battery? i saw that many people wrote reviews that when they tried using those batteries they got an error saying that the phone didn't support that battery or somewhere along those lines

EduardoZ714 said:
did you order the anker battery? i saw that many people wrote reviews that when they tried using those batteries they got an error saying that the phone didn't support that battery or somewhere along those lines
Click to expand...
Click to collapse
no, i ordered the original LG BL-53YH from Amazon. You can get them at more than half the original price. Also as an alternative you can email LG directly and explain the problem. I did that and they are going to send me a free replacement battery.

EduardoZ714 said:
did you order the anker battery? i saw that many people wrote reviews that when they tried using those batteries they got an error saying that the phone didn't support that battery or somewhere along those lines
Click to expand...
Click to collapse
It's a probably software issue. Try this http://forum.xda-developers.com/lg-g3/development/fix-stuck-custom-recovery-trying-ota-t2907508 or revert to stock. I'd say the best bet is reverting to stock via TWRP http://forum.xda-developers.com/tmobile-lg-g3/general/firmware-t-mobile-lg-g3-t2818667

Dead D855, would love any help. Thanks.

Hello,
So I had my D855 for 2 years and than, out of nowhere, my SD card didn't work anymore. I still think it is hardware issue.
But as it is 32gb device, I was fine with that.
And few days later it just turned itself off. No powering off device thing, it just went dead in my hand while I was replying to sms.
Nothing strange, I thought, so I took battery out, back in, nothing.
Plugged it in wall charger, nothing.
Longpress power (15 sec), nothing.
Volume down + power button, nothing.
New battery, nothing.
Charged it over night, nothing.
Plugged it in with no battery, nothing. Not even "can't charge" message. Plain dead.
Tried several other things, with no luck.
And I gave up, and left it on the shelf.
Last night, as a joke, I pressed POWER button and IT CAME ON! LG logo showed on the screen, and after 4-5 seconds, went dead again.
I have no idea what to try next, but this sign of life bring back hope to me.
Any suggestion is welcome.
Thanks in advance.
PS English is not my native, so sorry.

Forgot most important thing. I was on stock, and was never rooted! I have Nexus for that

Genuinely sounds like an issue with the battery. You might think otherwise, but get a new battery and give it a try. A dodgy or dying battery can cause insane amounts of issues, from SD card to display issues primarily because it's throwing out strange voltage readings.
Give it a try, if it doesn't work it's only cost a few £/$ but you'd be surprised.

I did try battery from friends g3, and it didn't work, but I'll get new one today and give it a try.
Sent from my Nexus 5X using Tapatalk

Nuuq said:
I did try battery from friends g3, and it didn't work, but I'll get new one today and give it a try.
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
Please do buddy. If it still doesn't work let me know.

pffcouk said:
Please do buddy. If it still doesn't work let me know.
Click to expand...
Click to collapse
I went to the store, and this kind guy let me to try before I buy. So he opened brand new battery, and still dead.
I did wait with that battery inside for 10ish min, and even tried to plug the charger in, but nothing happened.
Any new ideas mate?
Sent from my Nexus 5X using Tapatalk

Nuuq said:
I went to the store, and this kind guy let me to try before I buy. So he opened brand new battery, and still dead.
I did wait with that battery inside for 10ish min, and even tried to plug the charger in, but nothing happened.
Any new ideas mate?
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
I have exactly the same problem..
Is definitely a problem with battery powering...you can do nothing about it...
I personally just send it to reparation center from LG ..
Living in Netherlands..
Sent from my HTC Desire 500 using XDA Free mobile app

cultofluna said:
I have exactly the same problem..
Is definitely a problem with battery powering...you can do nothing about it...
I personally just send it to reparation center from LG ..
Living in Netherlands..
Sent from my HTC Desire 500 using XDA Free mobile app
Click to expand...
Click to collapse
So not the battery, but something between battery and device?
Sent from my Nexus 5X using Tapatalk

Nuuq said:
So not the battery, but something between battery and device?
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
Yes exactly....
Sent from my HTC Desire 500 using XDA Free mobile app

My LG G3 D855 keeps restart (not bootloop)

i have my LG G3 D855 for about 1.5 year now. i had cyanogenmod for a year. Sometimes, i mean once at the month it has been crashing, you know lagging for 2 seconds and restarting but i had the same problem on diffrent phones so for me it was nothing. Last week it started to keeps restarting, i dont mean bootloop. It started to crushing. sometimes i could wright the PIN, sometimes it crushed when rebooting. i've changed software many times, did hard reset, even used flash tool to flash kdz of original version of my LG and its still being the same what should i do? Please guys halp me!

Sounds like a battery problem. Get a multi meter and test the battery voltage across the positive and negative terminals, it should be the battery's voltage rating to make the phone boot properly.

Orcam said:
Sounds like a battery problem. Get a multi meter and test the battery voltage across the positive and negative terminals, it should be the battery's voltage rating to make the phone boot properly.
Click to expand...
Click to collapse
mine do bootloop and i measured the voltage it showed on two terminals 3.6 and on the other 3.98 so i guess its normal .. and i've tried flashing stock still no work and replaced battery and still no work any other ideas ?

Efarius said:
mine do bootloop and i measured the voltage it showed on two terminals 3.6 and on the other 3.98 so i guess its normal .. and i've tried flashing stock still no work and replaced battery and still no work any other ideas ?
Click to expand...
Click to collapse
It's definitely a G3? Not a G4? Well I don't have any ideas actually sorry. Try get it into a different mode apart from system boot. Like recovery or download mode, and see what you can do with that.

niezgodek said:
i have my LG G3 D855 for about 1.5 year now. i had cyanogenmod for a year. Sometimes, i mean once at the month it has been crashing, you know lagging for 2 seconds and restarting but i had the same problem on diffrent phones so for me it was nothing. Last week it started to keeps restarting, i dont mean bootloop. It started to crushing. sometimes i could wright the PIN, sometimes it crushed when rebooting. i've changed software many times, did hard reset, even used flash tool to flash kdz of original version of my LG and its still being the same what should i do? Please guys halp me!
Click to expand...
Click to collapse
Try to put the brightness at 0
Mabye keep restart due to high temperature

I had a similar issue in this thread https://forum.xda-developers.com/lg-g3/help/lg-g3-freezing-restarting-staying-boot-t3513239 but my issue turned out to be hardware related as replacing the battery did not aid (probably logic board issue).

Same here.
Started happening with Android 5.
Upgrading to 6 didn't change a thing.
Replacing the battery to a new original one neither.
Resetting neither, removing or changing SIM or SD card... Looks like it's an internal HW problem

Orcam said:
It's definitely a G3? Not a G4? Well I don't have any ideas actually sorry. Try get it into a different mode apart from system boot. Like recovery or download mode, and see what you can do with that.
Click to expand...
Click to collapse
I've tried download mode myself but it didn't last 2 min then it shut off completely.
---------- Post added at 05:50 PM ---------- Previous post was at 05:45 PM ----------
xenover said:
I had a similar issue in this thread https://forum.xda-developers.com/lg-g3/help/lg-g3-freezing-restarting-staying-boot-t3513239 but my issue turned out to be hardware related as replacing the battery did not aid (probably logic board issue).
Click to expand...
Click to collapse
did you take it to a repair shop and solved it or what ?

Efarius said:
did you take it to a repair shop and solved it or what ?
Click to expand...
Click to collapse
I bought a new phone instead since my warranty was void already. The repair costs would probably have been ~ 200€ anyway (150€ for a motherboard + repair costs ~50€).

Orcam said:
Sounds like a battery problem. Get a multi meter and test the battery voltage across the positive and negative terminals, it should be the battery's voltage rating to make the phone boot properly.
Click to expand...
Click to collapse
Same thing continued for a year to me. I tried to fix by buying 2 generic batteries from china. Problem continued. I bought official LG battery and now phone works perfectly.

i have the same probleme in my lg g3 D850 i flash it with android 6 and 7 but no news its still reboot atself when i keep it off for 9hour and i turn it on its start normaly but after same time its reboot again i try 2 fake battery and no news i need a solution too :/ :/ :/ when he start i try calibration battery app and grenefy nothing work for thes probleme :/