SGS2 bootloop! Help! - Galaxy S II Q&A, Help & Troubleshooting

Hi guys! First off, I know this sounds like a common problem, but I've looked through several times and haven't found a solution yet.
I have a SGS2, came as 2.3.3 stock but upgraded a while back to 2.3.5 through Kies. It was working perfectly for as long as I remember.
About a month ago the battery started acting weird going from 80% to 20% in no time, heating up too, I do remember dropping the phone once during this period, but it was nothing (just thought I should include this, also, I usually leave the phone plugged into the charger overnight as I do not have a power source at work (i work outdoors) i probably need a battery replacement)
The screen brightness would sometimes flicker and then POOF! The phone shuts off...At first this would happen at any activity, nothing specific, BUT, I have noticed that it intensifies with the Facebook app.
Anyways, usually plugging the phone back into the charger and powering it up would bring it back online, but not this time. It would get stuck looping the animation of the 'S' at the beginning and no booting up. I have a valid warranty card which I'm guessing will get the phone either fixed or replaced but I need help to try to salvage whatever info I can get my hands on, preferably everything, but my memos are most important to me.
Thanks for the help!

sherief87 said:
Hi guys! First off, I know this sounds like a common problem, but I've looked through several times and haven't found a solution yet.
I have a SGS2, came as 2.3.3 stock but upgraded a while back to 2.3.5 through Kies. It was working perfectly for as long as I remember.
About a month ago the battery started acting weird going from 80% to 20% in no time, heating up too, I do remember dropping the phone once during this period, but it was nothing (just thought I should include this, also, I usually leave the phone plugged into the charger overnight as I do not have a power source at work (i work outdoors) i probably need a battery replacement)
The screen brightness would sometimes flicker and then POOF! The phone shuts off...At first this would happen at any activity, nothing specific, BUT, I have noticed that it intensifies with the Facebook app.
Anyways, usually plugging the phone back into the charger and powering it up would bring it back online, but not this time. It would get stuck looping the animation of the 'S' at the beginning and no booting up. I have a valid warranty card which I'm guessing will get the phone either fixed or replaced but I need help to try to salvage whatever info I can get my hands on, preferably everything, but my memos are most important to me.
Thanks for the help!
Click to expand...
Click to collapse
are u rooted
try flashing the stock rom again and check if u face the same issue

I'm not rooted. I tried doing that using odin and got the stock firmware from sammobile. same thing happens, stuck at the boot.
a friend suggested i try to flash the stock ICS version, same thing.

sherief87 said:
I'm not rooted. I tried doing that using odin and got the stock firmware from sammobile. same thing happens, stuck at the boot.
a friend suggested i try to flash the stock ICS version, same thing.
Click to expand...
Click to collapse
Weird. It shouldn't boot loop. You sure your version is GT-I9100 and not GT-I9100G? Since I'm in Riyadh, the latest version for GB here (Saudi Arabia) was JPKJ2, but that's for GT-I9100, dunno about the G version.
Sent from my GT-I9100 using Tapatalk 2

okay so with the help of a friend and this awesome forum, i managed to install cwm, from there i could take a nandroid backup, but i cant mount the phone as a drive or anything to copy the files, and i'm guessing i cant use this backup i just took to restore later because it'll just get me stuck at the same place im at now
i read that i can use unyaffs to extract files from the resultant backup image, so my question is, before i do a wipe, is there any other method through which i could get a backup of my stuff? the things i would very much like to get a copy off are my messages/notes/whatsapp history and pretty much anything really
thanks for the help!

Related

[Q] Galaxy S II doesnt shut down (gets stuck while shutting down,not rebooting)

Hi everyone,
first of all I did search forum, but havent find answer nor related thread, if I have missed it please sorry about it.
Got my SGS2 about 6-7 months ago. No issues, everything perfect. Got updated to 2.3.4 with KIES (not really fan of experimenting with phone that have price of above average monthly salary in Serbia).
Rooted device with ZergRush exploit since I wanted as close to mint backup in case I have to send it to service(dont ask, service here is pain in the butt), purchased Mobile Odin Pro (cheers to that Chainfire) and flashed Hellcat's kernel for 2.3.4 from Mobile Odin.
Everything was cool, CWM, made EFS backup with his tool too, and so on...
However, about 2 moths ago, I started experiencing random restarts of the phone. Did search, found out that it happens and actually dealt with it.
Now, recently, i switched off my phone in the evening (was on 20% and didnt wanted to leave it on charger, and didnt want it to die on me during night), and in the morning I havent been able to turn it on. Freaked out badly, only to realize that its battery was empty. Which was odd because I DID turned it off.
About few days ago, i switched the phone, and it went to full shut down, however managed to get stucked somewhere in process (LED's are on, did vibrate i think) but never shuts down itself.
After some time, when I picked it up since I saw LED's on, i realized that its very hot and that I cant switch it back on (presumably because it never got shuts down) and had to remove battery so that I can switch it back on. When I did, i found out that battery was about 15% drained in that 10 mins, and I dont know what he was computing while shutting down, but it burned the sh*t out of itself.
Tonight it did that again so I decided to ask first before I do factory reset/wipe everything (maybe update to ICS too).
So, any idea, suggestion what to do is more than appreciated.
Cheers
Polite bump?
What is the actual problem .
jje
Well assuming you have read original post, why the hell that happen, does it happen to anyone else, and how to avoid it?
this may help
http://forum.xda-developers.com/showthread.php?t=1108499
Well, as I said, its not bootloop.
As I said, I shut down the phone, it starts shutting down, turn on leds, vibrate and stays turned on. After that battery drains quickly, and phone gets very hot.
When I get battery out, and back in it boots up without problems.
And I dont have any cooked rom, just Hellcats kernel for 2.3.4 stock rom.
you problem
Hi there,
Here's the best way to resolve this issue you have to re-flash a fresh new rom, meaning a full installation of the android os and here is how to do it,
First search google and download ODIN to ur computer or Pc.
Next search again google and type the following ( Sammobile.com ) and register and after that type the model number of your phone for example (i9100) in the site search bar and download rom that u need and thats it this should solve ur problem
Note : be sure to have 100% battery charged before doing the above and after installing ur new rom do a full wipe and enjoy,
I hope this was helpful,
Regards,
iMatrix
Yeah, thats probably that I will end up doing, luckily i have bought Titanium Backup so that I can backup all apps that I have and restore them after wiping everything.
I was wondering that somebody have any idea what might be going on.
Thanks for suggestions everyone.
before that try wiping cache and dalvik cache
Sent from my GT-I9100 using xda premium
This seems to happen quite a bit on gb roms.. definetely time to upgrade to ICS
Actually from what I have read about ICS 4.03, Im actually glad I didnt.
Releasing it in that state(e.g. battery issues again, 3rd party sms programs sends sms twice...) is bad for both G and Samsung imho...
Kepavi said:
Actually from what I have read about ICS 4.03, Im actually glad I didnt.
Releasing it in that state(e.g. battery issues again, 3rd party sms programs sends sms twice...) is bad for both G and Samsung imho...
Click to expand...
Click to collapse
Lp7 fixes these problems
Sent from my GT-I9100 using xda premium
Eudemony said:
Lp7 fixes these problems
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
I think I'll wait few more iterations just in case

SGS2 bricked while booting up.

Well, first of all, I should start by greeting the community, as this is my first post. So, yeah, hey everybody, been reading the forum for quite a while now, and it's been of a great help
Now, to the problem - this morning I noticed that my sgs2 had turned itself off. I didn't suspect the phone to be bricked or something as this happens from time to time when using custom roms. I tried turning it back on, it booted up, showed my kernels logo (DorimanX, not sure for the version though), so I put my phone in my pocket. After half an hour or so, I wanted to make a call, but I noticed that my sgs2 still hadn't booted up. So I tried restarting my phone using the power button, but instead of restarting it just turned off and I hadn't been able to turn it on since - it's bricked
I've heard of phones getting bricked while flashing a new rom or kernel, but never had I thought it could happen on simply booting up...
I did some research on bricked SGS2 and here's what I have done so far:
I've tried booting up in recovery/download modes, but that doesnt work.
I've tried soft/hard resetting my phone - still no luck.
I've also tried making an USB Jig, didn't work though. I'm not quite sure if my self-made jig works in the first place, as I did mess up the micro usb connector pretty bad while soldering resistors to pins. I'll try that one again with a different jack later and will keep you updated on weather it worked or not.
So, my question is, if my second try at making a USB Jig fails, is JTagging my only chance on reviving the phone? I guess that a MOBO change would probably help.
Another question is, if JTagging is my only chance, wouldn't it be easyer to just replace the bricked NAND chip? Then again, even though I have all kinds of soldering equipment accessible and also have the skills to do it, I have no idea where it's located on the mobo... Some info on that would also be much appreciated.
I havent flashed a new rom for quite a while now, last time I did it was when the latest version of Resurrection Remix was released.
My CPU wasn't overclocked - it was underclocked to 1GHz.
I was using DorimanX kernel.
Thanks in advance
jankanolv said:
Well, first of all, I should start by greeting the community, as this is my first post. So, yeah, hey everybody, been reading the forum for quite a while now, and it's been of a great help
Now, to the problem - this morning I noticed that my sgs2 had turned itself off. I didn't suspect the phone to be bricked or something as this happens from time to time when using custom roms. I tried turning it back on, it booted up, showed my kernels logo (DorimanX, not sure for the version though), so I put my phone in my pocket. After half an hour or so, I wanted to make a call, but I noticed that my sgs2 still hadn't booted up. So I tried restarting my phone using the power button, but instead of restarting it just turned off and I hadn't been able to turn it on since - it's bricked
I've heard of phones getting bricked while flashing a new rom or kernel, but never had I thought it could happen on simply booting up...
I did some research on bricked SGS2 and here's what I have done so far:
I've tried booting up in recovery/download modes, but that doesnt work.
I've tried soft/hard resetting my phone - still no luck.
I've also tried making an USB Jig, didn't work though. I'm not quite sure if my self-made jig works in the first place, as I did mess up the micro usb connector pretty bad while soldering resistors to pins. I'll try that one again with a different jack later and will keep you updated on weather it worked or not.
So, my question is, if my second try at making a USB Jig fails, is JTagging my only chance on reviving the phone? I guess that a MOBO change would probably help.
Another question is, if JTagging is my only chance, wouldn't it be easyer to just replace the bricked NAND chip? Then again, even though I have all kinds of soldering equipment accessible and also have the skills to do it, I have no idea where it's located on the mobo... Some info on that would also be much appreciated.
I havent flashed a new rom for quite a while now, last time I did it was when the latest version of Resurrection Remix was released.
My CPU wasn't overclocked - it was underclocked to 1GHz.
I was using DorimanX kernel.
Thanks in advance
Click to expand...
Click to collapse
What happens when you plug the charger. Does it charge?
pasanjay said:
What happens when you plug the charger. Does it charge?
Click to expand...
Click to collapse
I guess the battery is charging, as it heats up, but I don't see the charging animation. Also my PC won't see that a USB divice of any kind is connected.
jankanolv said:
I guess the battery is charging, as it heats up, but I don't see the charging animation. Also my PC won't see that a USB divice of any kind is connected.
Click to expand...
Click to collapse
order an usb jig and try. If it does not work send it to a repair center
Very similar happened to me a couple of days ago. Sgs2 crashed and wouldn't boot. I was also running dorimanx kernel, under clocked at 1ghz.
Originally I managed to get to download mode (not recovery mode). Kernels wouldn't flash via odin. I also tried using samsung kies to flash stock without success.
I tried the solution for nand bricked phones in this forum, however, this appears to have hard bricked the phone, since it failed to flash and now the phone does nothing (other than get hot when it is plugged in.) Nothing shows on screen. The PC does not recognise the device.
None of the threads I've read seem to offer a solution to this - any ideas? I guess I need to try a service centre, but thought I'd mention since I had same configuration as jankanolv, which of course may just be a coincidence...
birdr said:
Very similar happened to me a couple of days ago. Sgs2 crashed and wouldn't boot. I was also running dorimanx kernel, under clocked at 1ghz.
Originally I managed to get to download mode (not recovery mode). Kernels wouldn't flash via odin. I also tried using samsung kies to flash stock without success.
I tried the solution for nand bricked phones in this forum, however, this appears to have hard bricked the phone, since it failed to flash and now the phone does nothing (other than get hot when it is plugged in.) Nothing shows on screen. The PC does not recognise the device.
None of the threads I've read seem to offer a solution to this - any ideas? I guess I need to try a service centre, but thought I'd mention since I had same configuration as jankanolv, which of course may just be a coincidence...
Click to expand...
Click to collapse
Sounds familliar, lol. Anyways, did you use USB Jig to get to download mode? Or you just managed to boot it up on it's own?
I am really confused right now, because I'm pretty sure this can't be a hard brick as nothing has went wrong while flashing something on the device - it just bricked itself...
I've just get in the forum a few minutes ago only to find somoene with this symptoms, and i wasn't in here for too long and voilá...
Since yesterday my SGII, with no problems to this date, went in reboot mode for a few times.
I have no clue what is going on, but im sure something is.
i'll wait to see if theres anyone else complaining about it.
cheers
Hmm... Looks like a lot of people are getting this "brick" lately.
Maybe we all used some kind of app that bricked the phone on bootup?
Well, I tried to make another Jig, didn't work... This time though, I screwed my resitors up...
Another thing - is it really relevant to have exactly 301kOhm resistance between pins 4 and 5? As far as I know, it just kind of short circuits some pins on MOBO, which tells the phone to boot up in download mode. But I might be wrong...
Btw, sorry for the double post.
Same Problem
Hi,
I just face the same problem today,
now my S2 not working and just heat up.
this only happened after the original update done to my S2 - Android 4.1.2 - 2 days ago.
any help please
heat up....near the rear camera heat up?
Sent from the little guy
Mine gets hot near the camera. Nothing shows on screen.
In answer to jankanolv's questions:
- originally I could get to download mode via pressing home/power/volume down. (Not any more following failed flash). I've not tried a USB jig.
- my crash which started the situation occurred while I was listening to tune in radio pro app.
Well guys....near camera heating + no boot/dl/recovery = claim warranty saying that you factory reset the phone, 4.0.4 was laggy.
Sent from the little guy
was going to post a thread asking for help for what appears to be a similar problem
mine got stuck in a bootloop after pulling the battery, tried flashing new software in recovery then tried through odin but kept failing, now its bricked.
does nothing, wont go into either download or recovery mode so looks like its off to the service centre with it.
ahmadmetwally said:
Hi,
I just face the same problem today,
now my S2 not working and just heat up.
this only happened after the original update done to my S2 - Android 4.1.2 - 2 days ago.
any help please
Click to expand...
Click to collapse
Yessss! good to know I'm not the only one facing this issue.
I posted a thread about this yesterday but it is all the way down in page 3 already:
http://forum.xda-developers.com/showthread.php?t=2192996
I tapped on the "sync" toggle on the notification shade and my phone just turned itself off.
Recovery and download mode were accessible though.
Thanks for the help.
I went to Samsung to get them to fix based on the factory reset while on stock 4.04 premise, but they were having none of it, and wanted to charge me to investigate the problem. Once out of warranty period, it seems it doesn't matter if their software can brick your phone!
I found a local phone fixing service in Hong Kong which investigated, diagnosed as a motherboard failure (which I suspect my problem genuinely was given how firmware flashes were failing), and replaced + fitted for 700hkd, (approx 90usd). The guy did it in front of me within 10 mins. "Andy Telecom" in Mongkok, on +852 9237 9237 in case someone else has the same issue locally.
Well, outta warranty...that's another story. You only get 1-2 years to brick your device
Glad you had it fixed for 90 bucks, some service centers charge around 150.
Sent from the little guy
Well, I finally managed to make a working USB Jig, tried it on Galaxy Ace, worked like a charm.
What confuses me right now, is that my sgs2 has drained all the battery, even though it was switched off for about 2 days. I'm charging the device right now, and I will keep you updated on weather my jig works..
Sorry for double-posting again on an old thread, just wanted to let you guys know - I took the phone to warranty service and they changed the mobo. I didn't have to pay anything and everything is working normally. Of course all data on sd card is now lost for good, lol.
So if you hard brick your device so badly it even won't respond to usb jig and you still have your warranty active, don't bother trying to revive your phone - just take it to warranty service
I guess they couldn't see the odin download count so they cant void my warranty, he he he ]

Constant reboot not caused by rom

My note started doing this after it went through airport security. It was in a bag and went through the x-ray machine. It randomly reboots very often, probably between 20-60 second intervals. I was on CM10, then I flashed back to stock ICS, and then finally up to the official JB update. None of which has solved this problem.
i posted in here.. this may help.
http://forum.xda-developers.com/showthread.php?t=1854944
Good Luck
Still need help
dweeezy said:
i posted in here.. this may help.
http://forum.xda-developers.com/showthread.php?t=1854944
Good Luck
Click to expand...
Click to collapse
Phone is stuck in a boot loop and this is what I know so far. Phone is on stock ROM, power button is working fine, I can get to recovery and OS and download mode, and while phone was charging I took the battery out and the phone keeps vibrating. I now know it's a hardware problem for me (I think), but I can not pin point where. Any advise would be helpful cause I really love my note and this is just breaking my heart.:crying:

[Q] Galaxy s2 soft bricked with low storage

Alright then. Description of my problem first I guess. I was not at home and running out of battery on my S2, but play store asked me to update some application so I agreed. After this I got the message that my phones internaly storage was running low, and keep in mind that I had near to no battery life (like 5%) and was not near any sort of charge point. I tried to access the applications page, to delete some apps that I never used and when I did my phone randomly and crazily got stuck and switched off. I'm assuming it somehow drained the 5% battery life I had left.
I got home thinking I could just switch on my phone and delete some applications that I wasn't using...that was 2 days ago...I can't even get past the samsung splash screen. It goes on a horrible boot loop and I've just about tried everything apart from hard resetting and I don't want to do that as I haven't backed my phone up recently...
If anyone knows any other methods, could you please please help? I would really appreciate it if I could keep my files and just enter my phone to delete a couple applications...which I'm assuming is the problem.
What have you tried? What firmware do you have? More info would be nice :thumbup:
urdstve Juden
andrewwright said:
What have you tried? What firmware do you have? More info would be nice :thumbup:
Click to expand...
Click to collapse
yay for quick replies. I have tried cold booting, and soft resetting...I also went into recovery and cleared the cache partition to see if it would help and so far nothing... I have absolutely no idea what firmware I have and I have no idea how to check. I never tried to root my phone or install other roms.
OK so if you have no idea what firmware you was on don't reset Cuz if you was on 4.0.4 kiss good by to your phone. Was it ICS or jb? Do you know this? Pull battery out leave for a bit "5 mins" and try again. If that don't work and your not sure on firmware you need Odin to replace firmware yes data will be lost. Can you get to download mode?

Weird situation, phone mysteriously not starting, any insights?

Hi there! Long time reader, first time poster (TL;DR below...but it should be a quick read anyways )
So I've been using this S2 of mine for almost 4 years now, haven't had any trouble (other than a couple of battery swaps). For the past 6 months or so I've been using CM 12.1 nightlies without issue.
The events:
- The other day, my phone froze (I wasn't using it when it froze, it was when I went to use it that I noticed...it was on the wifi selection screen if it matters), so I held the power button to shut it down, and when I powered it back up, it just froze at the Samsung boot screen (with the usual yellow triangle).
- At this point, I was able to reboot into download mode at will, but any attempt to boot to recovery just led to the freeze at the Samsung boot screen. Also, the phone would automatically reboot itself at this point any time I inserted the battery (I was of course putting the battery in and out trying everything I could).
- I would have reflashed from Odin at this point, but since I was away for a few days I just kept trying to reboot into recovery, to no avail. On one of these attempts (power+vol up+ home) it showed the Samsung boot screen, and then immediately shut down and I haven't been able to get anything onto the screen since
I'm now home, and I can't seem to fix it. If I plug the phone into a charger, the top half or so of the phone gets warm, and it also seems to get warm if it isn't plugged in and I try to power it up. I was thinking maybe the phone was maybe doing the same thing as before and just not showing anything on screen, but I blindly do the steps to get it into download mode, and Odin doesn't recognize anything (drivers are definitely installed). I have also tried other batteries, no luck.
Any ideas of what I might try? I'm willing to do anything. For the record nothing happened to the phone at all when this all happened (no dropping or water damage or anything, just my attempts at booting into recovery). Maybe I should try a jig? I'm also open to opening the phone if there's something I can do, though I don't have experience with this.
Thanks so much for any suggestions!
TL;DR: phone froze (running CM 12.1 nightly), held power to shut it down, and then consistently froze at the boot screen on any attempts to power it on. After a few attempts at booting into recovery (the phone would only freeze or enter download mode) the screen suddenly shut off and I haven't seen anything on it since no matter what I try. I can't think of anything that happened to the phone I'm open to any and all suggestions! Thanks
One sentence amongst your description stands out like a 'sore thumb'.....
That the device heats up towards the top when you attempt to charge it.......
Until you try a jig I can't be certain, but that heating coupled with a dead/unresponsive screen along with a lack of recovery and/or download modes (download mode is 'hardwired' into the device, and NOTHING should be able to corrupt it) are the primary symptoms of a failed motherboard.......
That is my opinion based on my experience in these forums and personal experience with a (now dead) S2 (one of two that I own).........
Get the jig just to be sure, but I'd be surprised if it had any effect.....sorry to be typing something you don't want to read, but you said it yourself, the device is 4 years old....it's been in service roughly twice as long as most smartphones, and they don't last forever....
http://i.imgur.com/rVnFwJM.jpg
Thanks dude! It's nice to have some idea of what happened. I am indeed very happy my phone has lasted me this long, and my friend is gonna give me an extra S2 she has anyways it seems so it's all good!
I'll try the jig and update here with the result (I ordered one online...will arrive in January sometime)...just in case anyone is curious.
smacsmac said:
Thanks dude! It's nice to have some idea of what happened. I am indeed very happy my phone has lasted me this long, and my friend is gonna give me an extra S2 she has anyways it seems so it's all good!
I'll try the jig and update here with the result (I ordered one online...will arrive in January sometime)...just in case anyone is curious.
Click to expand...
Click to collapse
Yeah....be good to know the results.....If only to confirm or refute what I've suggested.....
http://i.imgur.com/rVnFwJM.jpg
keithross39 said:
Yeah....be good to know the results.....If only to confirm or refute what I've suggested.....
http://i.imgur.com/rVnFwJM.jpg
Click to expand...
Click to collapse
Sorry it took me a while...the jig was in the post haha. It didn't do anything at all (no response when I plugged it in) so I think it's safe to say you were bang-on and the motherboard failed! Happily using a new S2 (with CM13.0 now ) on behalf of my friend though.
Thanks again.
Sounds familiar. Happened to me also due to failed cyanogenmod update (CM13). Only thing that works is download mode, so i'm not given up hope yet.
I can't post a link but google ''Apply Update Failure samsung galaxy s II'' there's a thread about this on the cyanogenmod forum.
Elaias said:
Sounds familiar. Happened to me also due to failed cyanogenmod update (CM13). Only thing that works is download mode, so i'm not given up hope yet.
I can't post a link but google ''Apply Update Failure samsung galaxy s II'' there's a thread about this on the cyanogenmod forum.
Click to expand...
Click to collapse
oh mine was just straight up dead...no download mode or anything visible on the screen (and nothing to do with CM13 either)
hope you get yours sorted out! have you tried reflashing anything via Odin while in download mode?
Its hard to tell you and hard to accept. You can almost give up the hope, your NAND Chip is just what we call " wear-out ". In the most cases no write is possible anymore, the funny part is -> sometimes read is still fine. If that is the case: The system is booting and working, but saving just nothing. The NAND is frozen to its state before it broke.
At our local store, customers come to us with issues like " Factory Reset impossible ", "Can't delete my Files" "Can't create files". All these Devices have inaccessible NAND's and inaccessible Recovery. Only Bootloader is working, but as the NAND is broken, flashing doesn't change anything.
smacsmac said:
oh mine was just straight up dead...no download mode or anything visible on the screen (and nothing to do with CM13 either)
hope you get yours sorted out! have you tried reflashing anything via Odin while in download mode?
Click to expand...
Click to collapse
yeah, flashing with odin did the trick. now running cm13 and everything works fine. sorry to hear that your phone turned to brick.

Categories

Resources