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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

[Q] Random rebooting does not stop

Hi
This is a well known issue with the nexus 5. My device permanently starts rebooting. The google Logo occurs and then it rebotos again. There is no start animation. If I press the power and volume down bottom I just see the bootloader screen and after half a second it reboots. I can't do anything.
My phone is rooted (no custom ROM) and before I go back to the shop I want to unroot it. However, with this behaviour I'm not able to do it, or is there any chance? Does someone know at least, how I can boot normaly to unroot it.
thanks for your help
crampas

majorcrampas said:
Hi
This is a well known issue with the nexus 5. My device permanently starts rebooting. The google Logo occurs and then it rebotos again. There is no start animation. If I press the power and volume down bottom I just see the bootloader screen and after half a second it reboots. I can't do anything.
My phone is rooted (no custom ROM) and before I go back to the shop I want to unroot it. However, with this behaviour I'm not able to do it, or is there any chance? Does someone know at least, how I can boot normaly to unroot it.
thanks for your help
crampas
Click to expand...
Click to collapse
Hello, take a look at this thread http://forum.xda-developers.com/showthread.php?t=2513701

Is this really a well known issue? What were you doing directly beforehand? What have you tried to do to fix it? Have you tried using fastboot commands to reload factory images? Are you a toolkit only user? Have you tried a factory image through that?
Sent from my Nexus 5 using xda app-developers app

sorry, i overlooked that you cant enter fastboot.take a look here instead http://forum.xda-developers.com/showthread.php?t=2521691&page=3

kboya said:
Is this really a well known issue? What were you doing directly beforehand? What have you tried to do to fix it? Have you tried using fastboot commands to reload factory images? Are you a toolkit only user? Have you tried a factory image through that?
Sent from my Nexus 5 using xda app-developers app
Click to expand...
Click to collapse
Well IMHO it is a well known issue (see for example the wikipedia page or just have a look in tech forums). Directly before, I was writing an SMS and put it in my pocket (everything seems fine at that moment). 10 minutes later I just want to check my SMS and then it was already rebooting all the time. This was not the first time, I had this issue 2 todays before, but after approximatley 20 reboots it started correctly.
So far I was not able to use fastboot commands, since I can't enter fastboot. I didn't use a toolkit.

32299564
Madpiercing said:
sorry, i overlooked that you cant enter fastboot.take a look here instead http://forum.xda-developers.com/showthread.php?t=2521691&page=3
Click to expand...
Click to collapse
Thanks for the link. I will check it later, 'cause I have to leave. I will write again and let you know if I'm able to enter fastboot.

majorcrampas said:
Thanks for the link. I will check it later, 'cause I have to leave. I will write again and let you know if I'm able to enter fastboot.
Click to expand...
Click to collapse
no problemi, i hope you can unbrick it!

Use this thread:
http://forum.xda-developers.com/showthread.php?t=2513701
Or you can use this toolkit (some people are not fans of these but I am):
http://forum.xda-developers.com/showthread.php?t=2525026
I have never heard of the issue where it was only rooted and it just randomly decides to reboot and keeps doing it for no reason at all without the user flashing something that it did not like. So are you saying that you cannot even turn the phone off it just keeps going into a bootloop and trying to enter fastboot does nothing?
I don't think this is a really well known issue.. Have not seen to many support threads about this.

mistahseller said:
Use this thread:
http://forum.xda-developers.com/showthread.php?t=2513701
Or you can use this toolkit (some people are not fans of these but I am):
http://forum.xda-developers.com/showthread.php?t=2525026
I have never heard of the issue where it was only rooted and it just randomly decides to reboot and keeps doing it for no reason at all without the user flashing something that it did not like. So are you saying that you cannot even turn the phone off it just keeps going into a bootloop and trying to enter fastboot does nothing?
I don't think this is a really well known issue.. Have not seen to many support threads about this.
Click to expand...
Click to collapse
If the wall charger is plugged into the phone, the nexus just starts rebooting. I see the white Google logo and after one or two seconds it reboots. Sometimes you see the boot animation (4 circles) but after a short time it restarts the phone not able get to the point where you unlock the SIM. Trying to get into fastboot mode is also not possible. The fastboot mode appears but after half a second the phone reboots again. If the nexus is not connected to a charger it repeats rebooting for about four times after that just a black screen appears. If I'm not able to get into fastboot mode I can't unroot the phone, right? So the links you shared are not useful in my case
I have the nexus now over a week and the phone worked perfectly fine the first week.
I have uploaded two films of the problem to youtube, see this link. One film is with the nexus plugged into the chrager and one where it isn't.

That is very strange.
I would definitely use Madpiercing's post and link to http://forum.xda-developers.com/showthread.php?t=2521691&page=3 to try and fix it.

Madpiercing said:
no problemi, i hope you can unbrick it!
Click to expand...
Click to collapse
I tried the method described in your link without success. Still the same behavior. See my last post, there I add a youtube-link where you can see what exactly happens.

Saw your video that is very strange

mistahseller said:
Saw your video that is very strange
Click to expand...
Click to collapse
The very strange thing is, that it worked well over a week. the random rebooting starts two days ago, first time it starts again correctly after 5 min. Now it seems to hang in a loop.

mistahseller said:
Saw your video that is very strange
Click to expand...
Click to collapse
After a while I was able to get into the fastboot mode: I plugged my nexus into the wall charger for about 1 hour. Then it booted correctly. I had plugged my nexus into the charger before (over night) without leading to the same result. It seems that it just starts working correctly as random as it crashes
Do you think it is a bug in the bootloader or that something happened while to rooting the phone?

majorcrampas said:
After a while I was able to get into the fastboot mode: I plugged my nexus into the wall charger for about 1 hour. Then it booted correctly. I had plugged my nexus into the charger before (over night) without leading to the same result. It seems that it just startes working correctly as random as it crashes
Do you think it is a bug in the bootloader or that something happend due to rooting the phone?
Click to expand...
Click to collapse
It's most likely a hardware issue, bad cache memory on the cpu. I'd rma it.

jd1639 said:
It's most likely a hardware issue, bad cache memory on the cpu. I'd rma it.
Click to expand...
Click to collapse
I set it up again and give it another try. If something similar should happen again, I will rma it.

majorcrampas said:
I set it up again and give it another try. If something similar should happen again, I will rma it.
Click to expand...
Click to collapse
make sure you unroot and relock the bootloader and do this now while it is working.

mistahseller said:
make sure you unroot and relock the bootloader and do this now while it is working.
Click to expand...
Click to collapse
And triangle away or reset the flag or whatever.
Sent from my Nexus 5

[Q] XT925 Bricked after FDR

Hi all,
Did a factory data reset with a rooted, bootloader unlocked XT925 on stock jb and now its bricked. I can't access recovery, and when I do the simulated battery pull by pressing both volume keys and power button, it shows the moto dual core screen, before going to the android with the blue bar underneath usually seen while updating for about 30 seconds before briefly flashing the android on its side with the red triangular warning sign above it, then it powers off.
Is there anything I can do to save it? I had modified the start up animation which I think may be causing it. It won't even show up when plugged into my computer.
Thanks

Hi there :
At this point, can you get your xt925 on fastboot mode by pressing volume up and power while it is off? if so, you can just go ahead and flash a 4.1.2 rom. Since your BL is unlocked you can download one from any region that suits you.

hbenz2008 said:
Hi there :
At this point, can you get your xt925 on fastboot mode by pressing volume up and power while it is off? if so, you can just go ahead and flash a 4.1.2 rom. Since your BL is unlocked you can download one from any region that suits you.
Click to expand...
Click to collapse
Can't get into fastboot

aamd11 said:
Can't get into fastboot
Click to expand...
Click to collapse
With power + volume up you can't get to fastboot?

aamd11 said:
Can't get into fastboot
Click to expand...
Click to collapse
i have seen an unusual trend of hard bricks coming from fdr's recently. i cant begin to explain it, or offer a fix for it.
unfortunately from what you have described, your phone seems to be gone.
i can only suggest that anyone having issues with there phone, that they think a fdr would fix, dont do it!! re-flash with rsd instead until we determine what is causing this.
i know its not wide spread, but i wouldnt risk it just the same.

Sad Panda said:
With power + volume up you can't get to fastboot?
Click to expand...
Click to collapse
i got same problem. but when i get on fastboot and i start flashing my backup stock rom, it fails...
what can it be?

bweN diorD said:
i have seen an unusual trend of hard bricks coming from fdr's recently. i cant begin to explain it, or offer a fix for it.
unfortunately from what you have described, your phone seems to be gone.
i can only suggest that anyone having issues with there phone, that they think a fdr would fix, dont do it!! re-flash with rsd instead until we determine what is causing this.
i know its not wide spread, but i wouldnt risk it just the same.
Click to expand...
Click to collapse
Sad Panda said:
With power + volume up you can't get to fastboot?
Click to expand...
Click to collapse
Nope fastboot is inaccessible. Oh well! Sad this happened just before I updated to the loooong awaited KK build as well. Luckily I found a Sony Xperia Z1 for a great price so off to new things (and new subsection of XDA).
Thanks for the replies everyone!

on the other hand Xperia is a good unit

[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.
Click to expand...
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?

Faulty Xiaomi errors

My phone is passing some very serious problem and it all happened in ONE DAY!
First, it rebooted itself several times before I got it to boot again into the system. Then it automatically opens the shutdown menu and automatically locks itself. Then boom, it got itself into a bootloop and I cannot even access into TWRP. Everytime I got myself into TWRP, the phone reboots again, then again, and again. I had tried to update the TWRP recovery and upload again its ROM and it stills happens. And yeah, on the day before i installed subway surfer through an APK, so i am assuming it is a virus hijack.
What is happening???
Lists of things happened:
- The phone automatically locks the screen and opens the shutdown menu.
- The phone got itself into a bootloop
- The bootloop even happens when I am booting into TWRP, which haven't happened before.
- Even it got itself into the setup menu, it boots again.
- I am using MIUI 12.5.2 by Xiaomi.eu, and it happens after i installed subway surfer through an APK.
- Is it a virus hijacking???

More likely hardware issue. Probably the power button is stuck or bad contact.
Find Xiaomi repair center to fix it.

pl1992aw said:
More likely hardware issue. Probably the power button is stuck or bad contact.
Find Xiaomi repair center to fix it.
Click to expand...
Click to collapse
if it was the power button then holy cow, a ton of weight will be put off me, but I cannot go to the store now :"<

vinhvinh2008 said:
if it was the power button then holy cow, a ton of weight will be put off me, but I cannot go to the store now :"<
Click to expand...
Click to collapse
pl1992aw said:
More likely hardware issue. Probably the power button is stuck or bad contact.
Find Xiaomi repair center to fix it.
Click to expand...
Click to collapse
but after i got into twrp by fastboot and update the rom and the twrp, it doesn't boot AT ALL, and then it happens again

vinhvinh2008 said:
but after i got into twrp by fastboot and update the rom and the twrp, it doesn't boot AT ALL, and then it happens again
Click to expand...
Click to collapse
I would still suspect hardware problem.
Software cannot fix hardware issues.