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[Q] AT&T bootloop or suddent reboot

Hi, i have been looking for answers on the forum, and i learn new things but not how to fix this or what is causing it.
I have buyed i997 from a reseller. He sayd it doesnt work because it have bootloop, but i thinks that is not too much problem getting it working again, so i started searching for the pc drivers n software, then i find here in the forum the stock rom with and without root, i tested them both with odin and the bootloop stills present. I wipe cache and do a factory reset but it keep bootlooping, then think maybe if i update to latest AT&T rom, but no luck.Sometimes the phone just start and theres no bootloop but its very rare and most of the time when i get to the lock screen or setup manager suddently a gapps or something crash and my phome freezes and reboot. I flashed the carbon-jb-v1.6 and suddently it worked fine, no more bootloop and everything smooth,no crashes etc.. then i installed Facebook app and when i was ttyping a message the phone froze up and then restarts, and the bootloop came again, and im stuck on it, and when i pass it, which is very rare, i start typing info in the startup manager and the phone freezes and reboot.. I wipe/format cache, dalvik, factory reset, formated system and data before and after flashing the carbon rom again and it keeps bootlooping. Somebody have similar problems or know how to fix it?
Thanks
P.d. sorry for my bad english.

jakov.90 said:
Hi, i have been looking for answers on the forum, and i learn new things but not how to fix this or what is causing it.
I have buyed i997 from a reseller. He sayd it doesnt work because it have bootloop, but i thinks that is not too much problem getting it working again, so i started searching for the pc drivers n software, then i find here in the forum the stock rom with and without root, i tested them both with odin and the bootloop stills present. I wipe cache and do a factory reset but it keep bootlooping, then think maybe if i update to latest AT&T rom, but no luck.Sometimes the phone just start and theres no bootloop but its very rare and most of the time when i get to the lock screen or setup manager suddently a gapps or something crash and my phome freezes and reboot. I flashed the carbon-jb-v1.6 and suddently it worked fine, no more bootloop and everything smooth,no crashes etc.. then i installed Facebook app and when i was ttyping a message the phone froze up and then restarts, and the bootloop came again, and im stuck on it, and when i pass it, which is very rare, i start typing info in the startup manager and the phone freezes and reboot.. I wipe/format cache, dalvik, factory reset, formated system and data before and after flashing the carbon rom again and it keeps bootlooping. Somebody have similar problems or know how to fix it?
Thanks
P.d. sorry for my bad english.
Click to expand...
Click to collapse
the most inexpensive solution:
http://forum.xda-developers.com/showthread.php?t=1912599

qkster said:
the most inexpensive solution:
http://forum.xda-developers.com/showthread.php?t=1912599
Click to expand...
Click to collapse
Thanks man, but you think it can be the power button? When i unplug the battery and put it again the phone doesnt turn on or something, and when it boot up when i lock the screen with the power button it works fine. I set the cpu governor to conservative and since yesterday i didnt have any problem, but sometimes the phone reboots when typing, i think its someting with the processor or when the phone have little ram or something.
Thanks.

jakov.90 said:
Thanks man, but you think it can be the power button? When i unplug the battery and put it again the phone doesnt turn on or something, and when it boot up when i lock the screen with the power button it works fine. I set the cpu governor to conservative and since yesterday i didnt have any problem, but sometimes the phone reboots when typing, i think its someting with the processor or when the phone have little ram or something.
Thanks.
Click to expand...
Click to collapse
If you ran the phone on complete stock GB or FROYO and you are getting boot loops, it may be a hardware issue.
One of the few things that will give you boot loop with the samsung logo while using the phone is the power button.
Either way, it's no big deal to open it and clean it up to see if the problem goes away.

qkster said:
If you ran the phone on complete stock GB or FROYO and you are getting boot loops, it may be a hardware issue.
One of the few things that will give you boot loop with the samsung logo while using the phone is the power button.
Either way, it's no big deal to open it and clean it up to see if the problem goes away.
Click to expand...
Click to collapse
Thanks bud, I will try cleaning the button. Also I want to ask, is there something to log everything when the phone start? Or something to test the hardware functionality?
Thank you for your time

post number #112
http://forum.xda-developers.com/showthread.php?t=1437548&page=13

qkster said:
post number #112
http://forum.xda-developers.com/showthread.php?t=1437548&page=13
Click to expand...
Click to collapse
Thank you, the post its the number #122

jakov.90 said:
Thanks bud, I will try cleaning the button. Also I want to ask, is there something to log everything when the phone start? Or something to test the hardware functionality?
Thank you for your time
Click to expand...
Click to collapse
Bootlog Uptime will keep a record of all boots from an Android OS perspective ... It will also track crashes... It won't track events outside of a complete restart (i.e. power button bootloops.. But those are pretty obvious when they occur)
For hardware testing, try Z Device Test... That won't tell you about the buttons though... If your screen turns on without pressing power button or from any other standard event (like receiving a text or a phone call), or the phone restarts by itself, time to get cleaning..
Sent from my SAMSUNG-SGH-I997 using xda premium

Zen Arcade said:
Bootlog Uptime will keep a record of all boots from an Android OS perspective ... It will also track crashes... It won't track events outside of a complete restart (i.e. power button bootloops.. But those are pretty obvious when they occur)
For hardware testing, try Z Device Test... That won't tell you about the buttons though... If your screen turns on without pressing power button or from any other standard event (like receiving a text or a phone call), or the phone restarts by itself, time to get cleaning..
Sent from my SAMSUNG-SGH-I997 using xda premium
Click to expand...
Click to collapse
Hey thanks, that was very useful.. i risky miself to do a stock flrom flashing with pit checking the Nand erase all option in Odin 3.07, and the random reboots are gone :laugh:. Now i have one question, Do i need an special kernel for JB 4.2.2? i plan to flash the Carbon-jb-v1.6 rom but i dont know if i need another kernel

I'm glad to hear you solved your issue.
For JB, use the kernel provided with the rom.
Sent from my SAMSUNG-SGH-I997 using xda premium

boot loop - can't navigate bootloader to get into recovery mode

hi there,
I'm running CM11 nightly late feb. For no apparent reason my phone went into a boot loop this morning (n.b. I didn't flash a new rom or installed a new app). Now it constantly reboots (literally) and doesn't get further than the CM11 boot video or google logo.
If I press volume down and power, it will head into bootloader - but - I can't navigate beyond 'shut down' or 'restart bootloader'. It doesn't execute two consecutive volume up or down commands. In other words, it's impossible to get into recovery mode. Also, because my phone doesn't boot further than the video or logo, I can't make a fastboot or adb connection via my laptop.
Does anybody know how I can fix this issue? I'm clearly running out of luck. Many thx in advance!

reflash recovery?

Try to boot into recovery with cmd: fastboot boot TWRP.img (TWRP or your current custom recovery)
Then restore a nandroid backup or wipe data/system/dalvik
You can still flash the factory images. Fastboot mode is enough. Guide

suikerchiller said:
Now it constantly reboots (literally)
Click to expand...
Click to collapse
Stuck power button. Mash the power button really fast for 20 seconds to unstick whatever is in there.

gd6noob said:
reflash recovery?
Click to expand...
Click to collapse
can't flash anything, because phone is constantly rebooting. Have opened up the phone and took the battery out for 1 minute. Didn't help either. After starting up the phone I get stuck in the boot loop again.
Anyone else an idea?

suikerchiller said:
can't flash anything, because phone is constantly rebooting. Have opened up the phone and took the battery out for 1 minute. Didn't help either. After starting up the phone I get stuck in the boot loop again.
Anyone else an idea?
Click to expand...
Click to collapse
The phone doesn't reboot in the bootloader right?
If it doesn't either do what primokorn said or flash the factory image.
Sent from my Nexus 5

El Daddy said:
The phone doesn't reboot in the bootloader right?
If it doesn't either do what primokorn said or flash the factory image.
Sent from my Nexus 5
Click to expand...
Click to collapse
Well the issue is that it only stays for a fraction of a second in bootloader, which gives it enough time to navigate one step up or down. Not enough time to get into recovery.
How can I do what Primoken said? It doesn't seem to be possible to do a flash when the phone is constantly rebooting?
Thx for helping me out guys, much appreciated!

suikerchiller said:
Well the issue is that it only stays for a fraction of a second in bootloader, which gives it enough time to navigate one step up or down. Not enough time to get into recovery.
How can I do what Primoken said? It doesn't seem to be possible to do a flash when the phone is constantly rebooting?
Thx for helping me out guys, much appreciated!
Click to expand...
Click to collapse
Have you ever kept your phone in narrow pocket? Because it's definitely sounds to me like a stuck power button.

Simonna said:
Have you ever kept your phone in narrow pocket? Because it's definitely sounds to me like a stuck power button.
Click to expand...
Click to collapse
It's not a power issue. Also unscrewed my phone to see if that was what caused it. Nothing in there, mechanism functioned correctly.
UPDATE: For some reason my phone booted up out of nothing. I managed to flash an older ROM via CM Updater (through settings)- which seemed to work. Apps were updated and it was running normally. But after a couple of minutes it restarted out of the blue and now back to square one again.
Guess there's a chance I'll probably get a normal start up soon. Is it a good idea to do a factory whipe restart through the settings menu? Or is Primokorn's method safer?

suikerchiller said:
...Or is Primokorn's method safer?
Click to expand...
Click to collapse
Yes.

[Q] OPO Boot Loop/Hang After Drop

I accidentally dropped my OPO face first from about chest height earlier today. The screen didn't break but now my phone is acting weird.
First, it was okay but after a few minutes, it hanged up and was on a boot loop. I tried a factory reset but now I'm unable to get wifi (wifi button is off with a orange square around it) and the boot loop and hanging still persists. The phone does heat up and seems to go out of the loop if its cool enough. Hangs up if it gets hot.
Any help on fixing this? I'm going to try a fresh install in a few minutes but I'm kinda feeling this is a hardware issue already.

The fact that it still does it even after doing a factory reset is concerning. Try doing a complete factory restore as per this thread and then also try this. If both fail to resolve the issue i suspect your hardware has been damaged and i don't see you fixing the issue one your own unfortunately.

Yeah, unfortunately I did both already. Installed stock build and the Audio FX fix. The Audio FX bug is still showing up though. Not sure if I have done anything wrong in replacing persist.img

brutalpanda said:
Yeah, unfortunately I did both already. Installed stock build and the Audio FX fix. The Audio FX bug is still showing up though. Not sure if I have done anything wrong in replacing persist.img
Click to expand...
Click to collapse
You could also try flashing this. Though i think its unlikely to fix the issue, you don't have anything to lose at this point...this also re-flashes the reserve4 partition.

S M G said:
You could also try flashing this. Though i think its unlikely to fix the issue, you don't have anything to lose at this point...this also re-flashes the reserve4 partition.
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Click to collapse
Just an update, my phone is now dead. After rebooting several times this morning, it suddenly lost power. Not even charging helps. No response from power button and can't even fastboot. I guess the main board got affected when it fell and fried itself up in the process.
Crap. I'm really sad about this..I'll probably try opening it up and see if anything got dislodged. You think that's a good idea?

brutalpanda said:
Just an update, my phone is now dead. After rebooting several times this morning, it suddenly lost power. Not even charging helps. No response from power button and can't even fastboot. I guess the main board got affected when it fell and fried itself up in the process.
Crap. I'm really sad about this..I'll probably try opening it up and see if anything got dislodged. You think that's a good idea?
Click to expand...
Click to collapse
I sorry to hear that bro, its a bummer. You might as well open it up yourself and see if you can find anything obvious wrong with it, or you could try and get in contact with OnePlus and find out if they can do a repair of sorts, but i wouldn't get my hopes up on that though.

aa

brutalpanda said:
aa
Click to expand...
Click to collapse
S M G said:
I sorry to hear that bro, its a bummer. You might as well open it up yourself and see if you can find anything obvious wrong with it, or you could try and get in contact with OnePlus and find out if they can do a repair of sorts, but i wouldn't get my hopes up on that though.
Click to expand...
Click to collapse
Well, it seems there's power. The phone is slightly hot when touching it. I tried plugging via PC and Windows recognizes there's a USB device although after trying to install drivers, it prompted me that the device was not recognized. Not sure what to do at this point though.

brutalpanda said:
Just an update, my phone is now dead. After rebooting several times this morning, it suddenly lost power. Not even charging helps. No response from power button and can't even fastboot. I guess the main board got affected when it fell and fried itself up in the process.
Crap. I'm really sad about this..I'll probably try opening it up and see if anything got dislodged. You think that's a good idea?
Click to expand...
Click to collapse
brutalpanda said:
Well, it seems there's power. The phone is slightly hot when touching it. I tried plugging via PC and Windows recognizes there's a USB device although after trying to install drivers, it prompted me that the device was not recognized. Not sure what to do at this point though.
Click to expand...
Click to collapse
As what does Windows' Device Manager show/identify the device ?

S M G said:
As what does Windows' Device Manager show/identify the device ?
Click to expand...
Click to collapse
My phone is back but still boot looping. Would installing other ROMs solve the problem? I won't be able to RMA this so it's not an option.

brutalpanda said:
My phone is back but still boot looping. Would installing other ROMs solve the problem? I won't be able to RMA this so it's not an option.
Click to expand...
Click to collapse
It could perhaps, but lets start here: Can you boot into fastboot mode? If YES does it reboot itself while in fastboot or is it actually stable as in it stays in fastboot?

S M G said:
It could perhaps, but lets start here: Can you boot into fastboot mode? If YES does it reboot itself while in fastboot or is it actually stable as in it stays in fastboot?
Click to expand...
Click to collapse
It's actually quite stable. I had never seen it reboot when in Fastboot. It's also worth mentioning that if I'm in Recovery Mode (TWRP installed), the phone also doesn't reboot.
I also noticed that ever since the drop/boot loop/hangs, my phone reboots very long (around 2-3 minutes it it does boot into the system; which happens less frequently than the boot loop). Before it took probably a minute at most to reboot.

brutalpanda said:
It's actually quite stable. I had never seen it reboot when in Fastboot. It's also worth mentioning that if I'm in Recovery Mode (TWRP installed), the phone also doesn't reboot.
I also noticed that ever since the drop/boot loop/hangs, my phone reboots very long (around 2-3 minutes it it does boot into the system; which happens less frequently than the boot loop). Before it took probably a minute at most to reboot.
Click to expand...
Click to collapse
Another update. So here's what I found out. My phone needs to be super cooled for it to work. I tried putting it in front of the air conditioner. If it's really cool, WIFI works. When it gets slightly warm, my phone hangs up. When it reboots, I lose wifi. After that, if I still don't cool it down, boot loops happens.
I'm not sure what's happening but it seems that it's an overheating issue perhaps?

brutalpanda said:
Another update. So here's what I found out. My phone needs to be super cooled for it to work. I tried putting it in front of the air conditioner. If it's really cool, WIFI works. When it gets slightly warm, my phone hangs up. When it reboots, I lose wifi. After that, if I still don't cool it down, boot loops happens.
I'm not sure what's happening but it seems that it's an overheating issue perhaps?
Click to expand...
Click to collapse
Well that is possible, i suppose. Maybe the heat-spreader moved away ever so slightly of the CPU, or isn't making good enough contact with it anymore which would lead to it not properly dissipating the heat. Unfortunately that i wont be able to know.
Lets assume that this is a software issue for now. Have you tried this yet by any chance ?
If not it is definitely worth a shot. Before flashing it i recommend clearing cache partition & dalvik cache in TWRP first then reboot into bootloader mode and then run this as per the READ ME file which is included.
There are essentially 3 batch file you need to run and it will recreate all the partitions on your device etc.
PS: You need to register on the OnePlus forums to actually be able to view the thread.
PPS: If for some reason the download link is bad let me know and ill mirror it for you on my dropbox.

S M G said:
Well that is possible, i suppose. Maybe the heat-spreader moved away ever so slightly of the CPU, or isn't making good enough contact with it anymore which would lead to it not properly dissipating the heat. Unfortunately that i wont be able to know.
Lets assume that this is a software issue for now. Have you tried this yet by any chance ?
If not it is definitely worth a shot. Before flashing it i recommend clearing cache partition & dalvik cache in TWRP first then reboot into bootloader mode and then run this as per the READ ME file which is included.
There are essentially 3 batch file you need to run and it will recreate all the partitions on your device etc.
PS: You need to register on the OnePlus forums to actually be able to view the thread.
PPS: If for some reason the download link is bad let me know and ill mirror it for you on my dropbox.
Click to expand...
Click to collapse
Yeah, unfortunately I have the 16GB version. Any chance what's the difference? Is it just the userdata.img?

Crash test StabilityTest (does restart)

My 5 Nexus restart always do
After
How long
I can not know what it was caused
Testing StabilityTest
He stuck a few seconds does restart
What could be the reason for this?
Processor?
Memory?
Help to know hydrate is caused?
Sorry for my bad English

haimmalka said:
My 5 Nexus restart always do
After
How long
I can not know what it was caused
Testing StabilityTest
He stuck a few seconds does restart
What could be the reason for this?
Processor?
Memory?
Help to know hydrate is caused?
Sorry for my bad English
Click to expand...
Click to collapse
Google translate isn't working well do it's hard to understand your problem. My first guess is it's your power button is stuck
Sent from my Nexus 9 using XDA Free mobile app

jd1639 said:
Google translate isn't working well do it's hard to understand your problem. My first guess is it's your power button is stuck
Sent from my Nexus 9 using XDA Free mobile app
Click to expand...
Click to collapse
I checked it is not stuck
Was stuck in a course he was not testing StabilityTest
When the probe reaches some numbers ram it to restart Test
My problem is my device does restarting for no reason
I'm trying to figure out what causes it...Maybe not good ram device

haimmalka said:
I checked it is not stuck
Was stuck in a course he was not testing StabilityTest
When the probe reaches some numbers ram it to restart Test
My problem is my device does restarting for no reason
I'm trying to figure out what causes it...Maybe not good ram device
Click to expand...
Click to collapse
Try booting in safe mode. If it still reboots, then flash a factory image with fastboot. If it still reboots then, you've got a hardware problem.

_MetalHead_ said:
Try booting in safe mode. If it still reboots, then flash a factory image with fastboot. If it still reboots then, you've got a hardware problem.
Click to expand...
Click to collapse
I tried that does not help
https://developers.google.com/android/nexus/images#hammerhead
I think the problem hardware you never know what problem?
There is a test that I can do and know exactly what causes it?
My area I live phone repair lab are not good
Do not trust them one shop has been sent to repair He returned device without repair a problem he does not know what the problem is

haimmalka said:
I tried that does not help
https://developers.google.com/android/nexus/images#hammerhead
I think the problem hardware you never know what problem?
There is a test that I can do and know exactly what causes it?
My area I live phone repair lab are not good
Do not trust them one shop has been sent to repair He returned device without repair a problem he does not know what the problem is
Click to expand...
Click to collapse
If you flashed a factory image and it still does it, then it is likely a hardware issue.
Replying to your PM- Boot into safe mode by pressing the power button, and when the reboot menu comes up, press and hold "Power off" until the option to reboot to safe mode pops up. Then just hit OK.

_MetalHead_ said:
If you flashed a factory image and it still does it, then it is likely a hardware issue.
Replying to your PM- Boot into safe mode by pressing the power button, and when the reboot menu comes up, press and hold "Power off" until the option to reboot to safe mode pops up. Then just hit OK.
Click to expand...
Click to collapse
I am now safe mode
What does it do?
Keep it that way?
Check with a recurring problem?
I get calls when I'm safe mode?
It does not interfere with my work when I device safe mode?

haimmalka said:
I am now safe mode
What does it do?
Keep it that way?
Check with a recurring problem?
I get calls when I'm safe mode?
It does not interfere with my work when I device safe mode?
Click to expand...
Click to collapse
Safe mode boots your phone without any 3rd party apps or non essential software. It basically only loads the stuff your phone needs to run which will help to eliminate any apps as the culprit. Yes you'll still get calls, but any apps you use won't be accessible. It's not something that's meant to be used all the time, just for troubleshooting. So, if you still get reboots while in safe mode, that means you either have a hardware problem, or a firmware glitch. But since you said you already flashed the factory image that pretty much rules out the firmware, leaving hardware as being your issue.

Oneplus One keeps rebooting

Recently my screen's digitizer broke, so I ordered a new screen and just got it today.
I replaced it and I tested it, it turned on and that, but when I try to boot it just come with the onplus logo and powered by android stuff in the bottom and that's the only thing it's showing with it just turns off and on basically rebooting
So I tested, can it go into fastboot it could so I tried flashing twrp on but didn't work keeps doing the same cannot even enter recovery just fastboot.
Anyone tried this before or, what can I do to fix it if there is a possible fix for it.

Have you tried flashing official images from fastboot? hopefully not a hardware issues

I'm having the same problem, also since today. My phone just got in a bootloop while powered on and running completely fine. Trying to boot into recovery also gets me a bootloop. Fastboot works, and when i try to flash anything it tells me it succeeds. Then when i try to power on again, still the same bootloop.
I've tried the Oneplus Recovery Tool, same thing. Everything succeeds, but I still end up with a bootloop. The logo on the fastboot page had changed, though, so I'm guessing the flash was successful, but something else is broken.
I'm actually really worried about my phone right now.

morreion said:
I'm having the same problem, also since today. My phone just got in a bootloop while powered on and running completely fine. Trying to boot into recovery also gets me a bootloop. Fastboot works, and when i try to flash anything it tells me it succeeds. Then when i try to power on again, still the same bootloop.
I've tried the Oneplus Recovery Tool, same thing. Everything succeeds, but I still end up with a bootloop. The logo on the fastboot page had changed, though, so I'm guessing the flash was successful, but something else is broken.
I'm actually really worried about my phone right now.
Click to expand...
Click to collapse
You tried one plus recovery tool cm11s?

Mr.Ak said:
You tried one plus recovery tool cm11s?
Click to expand...
Click to collapse
Yep, that's the one. Everything seems to work fine, all the bars are loading, and the device turns green. Unplugged the device, booted up, still a bootloop.
I tried the ColorOS guide (https://forum.xda-developers.com/oneplus-one/general/guide-unbrick-oneplus-one-t3013732) too, same thing. The boot logo did turn red though.

morreion said:
Yep, that's the one. Everything seems to work fine, all the bars are loading, and the device turns green. Unplugged the device, booted up, still a bootloop.
I tried the ColorOS guide (https://forum.xda-developers.com/oneplus-one/general/guide-unbrick-oneplus-one-t3013732) too, same thing. The boot logo did turn red though.
Click to expand...
Click to collapse
If even that tool couldn't solve it then it's definitely a hardware issue.

Mr.Ak said:
If even that tool couldn't solve it then it's definitely a hardware issue.
Click to expand...
Click to collapse
Damn. Well, too bad. I'm going to try to fix my phone for a bit more, not that I think it's still fixable. Thanks!

I also think it is a hardware issue but I don't want it to be :/
It's just funny but I think I found it, its the power button because apparently the button itself got off the wire so maybe I can sort it on again.
Or maybe it could be something else but cannot seem to find it.
I maybe u try to get my friend to sort a new storage chip on if I can get I contact with him wish me luck

morreion said:
Damn. Well, too bad. I'm going to try to fix my phone for a bit more, not that I think it's still fixable. Thanks!
Click to expand...
Click to collapse
Just get your device checked from a local source and then replace the decayed part yourself.
AFAIK,it can be either battery or Motherboard/Logic board.
---------- Post added at 09:07 PM ---------- Previous post was at 09:06 PM ----------
Melonendk said:
I also think it is a hardware issue but I don't want it to be :/
It's just funny but I think I found it, its the power button because apparently the button itself got off the wire so maybe I can sort it on again.
Or maybe it could be something else but cannot seem to find it.
I maybe u try to get my friend to sort a new storage chip on if I can get I contact with him wish me luck
Click to expand...
Click to collapse
Best of luck!

I am encountering the same problem. Out of nowhere my phone started rebooting. It reboots ok and after a minute it does it again...so it is working alright for a minute. However, my phone is completely stock Cyanogen OS...
I have tried this, but it did not work for me.

diosak said:
I am encountering the same problem. Out of nowhere my phone started rebooting. It reboots ok and after a minute it does it again...so it is working alright for a minute. However, my phone is completely stock Cyanogen OS...
I have tried this, but it did not work for me.
Click to expand...
Click to collapse
If it does work alright for a minute every time, I don't think you have the same problem as I have.