Boot loop after restart phone... - Galaxy S II Q&A, Help & Troubleshooting

Hi, I know there might be some people posted the similar problem as mine before, but I couldn't find any, therefore I start a new thread, please don't blame me.
Just now my phone suddenly show that no sim card detected, then I restarted my phone (by long press "lock" button and select "Restart").
After the phone back to my launcher after restart, a few seconds later it restart by itself again, and continue this loop forever...
HELP!!! Please advice me what to do? I am hoping for a solution that will not required factory reset... please~~~
Thank you in advance.

Have you seen this guide?
http://forum.xda-developers.com/showthread.php?t=1457458&highlight=bootloop

iamafrk said:
Have you seen this guide?
http://forum.xda-developers.com/showthread.php?t=1457458&highlight=bootloop
Click to expand...
Click to collapse
I am trying to find out if anyone has to this problem without factory resetting............ Really headache as i didn't backup the apps..... And i am using stock ROM, really no idea why my phone suddenly went into boot loop

csoonp said:
Really headache as i didn't backup the apps.....
Click to expand...
Click to collapse
Bad Move

Related

[SOLVED][with help of ddotpatel] Something BAD happened with Nandroid Restore - HELP!

Hey,
I have a huge problem, people.
I've had some issues with one of the ROMs that I tested, so decided to restore my Nandroid Backup. I've wiped everything and runned the Nandroid Restore of my previous - working ROM (EzHero 1.2.1) - everything looked as if it worked fine, the operation was completed succesfully. So, given that I've chosen reboot phone option in the Recovery (AmonRa 1.6.2) and it turned on with a regular booting screen and just stuck on it. It's been like 2hrs and I'm constantly stuck on this "loading" screen and cannot turn the mobile off either by holding Power or Power Home or Power Home Back. Nothing. I don't wanna take the battery out as I heard that it can be devastating.
So, to clarify all of that, I have a phone connected via cable (yet no connection through ADB) to PC, so the battery would not discharge and the phone itself is stuck on booting logo/animation, the one just before it goes into the usual desktop screen.
How can I go about it to restore it?
Thanks!
Do you have App2SD ?? If yes it may took ages to boot when you do a first boot... But that only works if you had done a Nandroid + Ext...
Its fine to take your battery out,... Reset and give it another try at booting. If it fails again, try booting without SD in. If it fails again, try doing another restore of your nandroid. Fail again,... Full wipe then reflash ROM.
There is only risk of bricking when flashing a new radio and interrupting the process.
sebxd said:
Do you have App2SD ?? If yes it may took ages to boot when you do a first boot... But that only works if you had done a Nandroid + Ext...
Click to expand...
Click to collapse
I do have apps2sd but haven't done +Ext.
When I soft-reseted the device it obviously went into boot loop again BUT I have managed to connect it to my PC through ADB now and wonder if I could use it to my advantage?
ddotpatel said:
Its fine to take your battery out,... Reset and give it another try at booting. If it fails again, try booting without SD in. If it fails again, try doing another restore of your nandroid. Fail again,... Full wipe then reflash ROM.
There is only risk of bricking when flashing a new radio and interrupting the process.
Click to expand...
Click to collapse
The problem is my phone IS stuck at boot loop and even if I soft reset it I don't have enough time to press POWER and HOME to go into Recovery so I cannot check if I could do restore. Would connection through ADB help as I currently after soft reset have it?
I have to clear something up my phone is in the boot loop but not as in that it reboots itself time after time - NO! It just sticks on the booting animation and that's it.
Oh, and running this "fastboot boot recovery-RA-hero-v1.6.2.img" through ADB just sits stuck at "< waiting for the device >" though I _can_ list the contents of my Hero through shell.
Also when I press vol up or vol down in the state with startup screen beeing stuck I can hear it same way as if I heard it in the working phone - as in beeping when pressing up and beeping lower when down.
I'm not so clued up on fastboot commands to be honest.
Take your battery out,... Hold HOME and put your battery back in..... KEEPING HOME HELD IN
OK! Finally after finding enough courage to do so I pulled the battery out as ddotpatel advised me to - I have to say it was scary 30s, real scary. Anyway, it seemed that his advice was correct and he is in fact a very wise man - THANK YOU! Afterwards I've done all the wipes again as I did initially and instead of trying to recover it from my Nandroid backup I just gave up and reflashed it again. It didn't work, so I reformated and repartitioned the SD card and it's all good now... And I'm a happy puppy! Actually, I'm no puppy at all but I am happy nonetheless.
@ddotpatel Thank you sir! You are a Gentleman and a Scholar and I shall praise your name forever on this and other Android forums alike. ^__^ Just a quick question though: removing a battery is prohibited only when flashing radio and when the phone's on the "phone & a box/arrow" picture, right? So if I ever have an booting/issue error whilst flashing custom ROMs that do nothing to the radio I should be fine poping the battery?
I know I sad it trice already but - ddotpatel, sir, THANK YOU!
kad3t said:
....Just a quick question though: removing a battery is prohibited only when flashing radio and when the phone's on the "phone & a box/arrow" picture, right? So if I ever have an booting/issue error whilst flashing custom ROMs that do nothing to the radio I should be fine poping the battery?...
Click to expand...
Click to collapse
Yes indeed, you are correct....
and as for all the praise,.... Oh stop it, your making me blush!
I'm Jealous I firstly tried to help you
ddotpatel said:
Yes indeed, you are correct....
and as for all the praise,.... Oh stop it, your making me blush!
Click to expand...
Click to collapse
I have to say I would not made the move if it was not for you though I did check few of your earlier posts and those made me follow your advice as you seem very knowledgeble. ^__^
sebxd said:
I'm Jealous I firstly tried to help you
Click to expand...
Click to collapse
Thank you too! I'm sorry but it was his advice that helped/pushed me in the right direction. However your try is also equally appreciated. ^__^
kad3t said:
I have to say I would not made the move if it was not for you though I did check few of your earlier posts and those made me follow your advice as you seem very knowledgeble. ^__^
Click to expand...
Click to collapse
Ah its no problem,... I honestly didn't know a single thing until I started lurking on here. Just keep your eyes open, try to read other peoples problems even if you don't know a solution yourself. There are alot of helpful guys and gals on here.
Pay it forward. Peace.
ddotpatel said:
Ah its no problem,... I honestly didn't know a single thing until I started lurking on here. Just keep your eyes open, try to read other peoples problems even if you don't know a solution yourself. There are alot of helpful guys and gals on here.
Pay it forward. Peace.
Click to expand...
Click to collapse
No worries, mate! My post count did not go up to 73 in like 5 days for no reason. I try to help as much as I can and also would not run into those problems if I wouldn't flash and benchmark many ROMs (posting all the stats for the same configurations & settings) here for others to decide on their own which they liked best either. ^__^
Peace!

[Q] Will not boot - flashing black screen

Received a brand new Ace yesterday, and immediately rooted it with super one click with no problems.
However I then tried to run the 'Galaxy Ace Unlock apk' which I'd found elsewhere.
It generated an unlock pin, but after rebooting it stuck on the Galaxy Ace flash screen. After 5 minutes I pulled the battery out, waited, then rebooted. Now it doesn't even get to the Galaxy Ace screen when switched on.
The screen backlight comes on (with a black screen) for a couple of seconds, then off, then on - but it never gets any further.
So far I've tried
- Flashing Stock Froyo via Odin
- Flashing VillainRom via Odin
In both cases the phone enters download mode, Odin completes all steps without error, but on reboot I am left with the black screen of death again!
Anything else I could try?
I have the same problem.
Have you found a solution?
zongamin said:
Received a brand new Ace yesterday, and immediately rooted it with super one click with no problems.
However I then tried to run the 'Galaxy Ace Unlock apk' which I'd found elsewhere.
It generated an unlock pin, but after rebooting it stuck on the Galaxy Ace flash screen. After 5 minutes I pulled the battery out, waited, then rebooted. Now it doesn't even get to the Galaxy Ace screen when switched on.
The screen backlight comes on (with a black screen) for a couple of seconds, then off, then on - but it never gets any further.
So far I've tried
- Flashing Stock Froyo via Odin
- Flashing VillainRom via Odin
In both cases the phone enters download mode, Odin completes all steps without error, but on reboot I am left with the black screen of death again!
Anything else I could try?
Click to expand...
Click to collapse
Hey!
Dose you RESET FACTORY SETTINGS and FORMAT CACHE in recovery, before flashing with ODIN?
CHEERS!
Did the light lit when you entered the download mode? That's the indicator.
I got the same proble, tried several firmwares with odin but, when the phone reboots it starts flashing again
Hey!
You all, try THIS one.
CHEERS!
casiocas said:
Hey!
You all, try THIS one.
CHEERS!
Click to expand...
Click to collapse
I tried it, several times with different firmwares but it doesn´t do anything. The phone, when rebooting with odin, keeps flashing the black screen
moe_szislack said:
I tried it, several times with different firmwares but it doesn´t do anything. The phone, when rebooting with odin, keeps flashing the black screen
Click to expand...
Click to collapse
Hey!
Just wanted to ask, FROM WHERE you downloaded you UNLOCK soft. Can you give me the link? PLEASE!
CHEERS!
casiocas said:
Hey!
Just wanted to ask, FROM WHERE you downloaded you UNLOCK soft. Can you give me the link? PLEASE!
CHEERS!
Click to expand...
Click to collapse
Sorry if it sound rude, it wasn´t my intention.
I download the soft form samfirmwares.com.
Cheers
moe_szislack said:
Sorry if it sound rude, it wasn´t my intention.
I download the soft form samfirmwares.com.
Cheers
Click to expand...
Click to collapse
Ok, I get. But SORRY, then I cant help. You must contact then, from where you downloaded it.
Just I hope you get fixed your phone(If you most take it to SERVICE, try to explain them that you tryed RESET FACTORY SETTINGS. It work for several ppl-s here, who must take his phone to SERVICE). Just be 10 times SURE, that you cant flash or recovery you phone, or they can do the same and see that your phone WAS ROOTED or FLASHED the CUSTOM ROM(JUST BE SURE, THEY CANT ACCESS YOU PHONE or you lose you WARRANTY).
I hope all ENDS good! Fingers crossed for you phone!!!
CHEERS!
casiocas said:
Ok, I get. But SORRY, then I cant help. You must contact then, from where you downloaded it.
Just I hope you get fixed your phone(If you most take it to SERVICE, try to explain them that you tryed RESET FACTORY SETTINGS. It work for several ppl-s here, who must take his phone to SERVICE). Just be 10 times SURE, that you cant flash or recovery you phone, or they can do the same and see that your phone WAS ROOTED or FLASHED the CUSTOM ROM(JUST BE SURE, THEY CANT ACCESS YOU PHONE or you lose you WARRANTY).
I hope all ENDS good! Fingers crossed for you phone!!!
CHEERS!
Click to expand...
Click to collapse
I forgot to say that I put a sim card (from other country) inside the ACE to check if it was unlocked.
Can it be the problem?
moe_szislack said:
I forgot to say that I put a sim card (from other country) inside the ACE to check if it was unlocked.
Can it be the problem?
Click to expand...
Click to collapse
Hey!
I want to help you, REALLY, but a bout that queation, I CANT ANSWER, RIGHT NOW. DONT KNOW EXACTLY. SORRY!
I try to find answers tomorrow(we have here 23:27). Tomorrow to work.
CHEERS!
casiocas said:
Hey!
I want to help you, REALLY, but a bout that queation, I CANT ANSWER, RIGHT NOW. DONT KNOW EXACTLY. SORRY!
I try to find answers tomorrow(we have here 23:27). Tomorrow to work.
CHEERS!
Click to expand...
Click to collapse
Ok, Thank you
Need help screen just flashes and blinks..
Tried multiple rom flashes...odin says pass but the ph doesn't boot up
Sent from my SAMSUNG-SGH-I897 using XDA App
misterio_mr111 said:
Need help screen just flashes and blinks..
Tried multiple rom flashes...odin says pass but the ph doesn't boot up
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
The same thing happens to me, Anybody has any idea?
Just send it to the service center.
No other recovery method is know.
I have been in every forum arond for this kinda brick and there is no solution for YOU to do. Also there is absolutely no way for Samsung to see either say that after the first boot the battery went dead and it never started again. It will be covered by your warranty and brand new ace! Now dont go making stupid mistakes again hope i helped
Sent from my GT-S5830 using XDA App
Apk/sim bricked my phone.
Unlock Apk also bricked my phone in the same manner.
The app generating the code is not the problem on it's own, it's when you put the "other" Sim card in and reboot that does the damage.
I got a buzz when i could still get Download Mode and Odin gave me a PASS when i reflashed, but alas the phone never rebooted and it still flashed black at me.
I'm trying everything to bring it back to life before it goes to the Service Centre and i have to give them some blag as to why it's bricked.
Other than Download Mode i can get "Emergency Dload Mode"(ARM9) & RAMDUMP.
BLZBud said:
Unlock Apk also bricked my phone in the same manner.
The app generating the code is not the problem on it's own, it's when you put the "other" Sim card in and reboot that does the damage.
I got a buzz when i could still get Download Mode and Odin gave me a PASS when i reflashed, but alas the phone never rebooted and it still flashed black at me.
I'm trying everything to bring it back to life before it goes to the Service Centre and i have to give them some blag as to why it's bricked.
Other than Download Mode i can get "Emergency Dload Mode"(ARM9) & RAMDUMP.
Click to expand...
Click to collapse
I got the same problem and still nobody has found how to unbrick the phone.
I´ll keep searching
moe_szislack said:
I got the same problem and still nobody has found how to unbrick the phone.
I´ll keep searching
Click to expand...
Click to collapse
Even Samsung don't have an easy way to repair it, hence they replace the mainboard to fix the issue.

[Q] Is my phone bricked? What can I do?

I've done some searching and come up with nothing so maybe I'm overlooking something or I need help. I flashed the AOSP ROM and was attempting to clear out the SD card and make sure everything was in its place when I rebooted my phone only to be greeted with a LG logo for a second or two followed by a black screen and nothing else. The first thing I tried was to reboot into recovery and it didn't go. So then I tried to power the phone off and make sure I was hitting the combo correctly and got nothing. Again. So I'm scratching my head wondering what to do next. I though I might need to use LGNPST but I can't find a download for it (I will join the IRC and get it that way if I need to but I wanna be sure before bothering anyone in there). What do I need to do? Am I SOL? Is there anything I can check for to see just how bricked I am? Thanks for the help and I'll keep looking while I wait for replies. I appreciate it, guys.
Edit: After LGNPST was giving me a hanging boot animation I did a hard reset with vol down and power. It prompted me to reset, I did that and now everything is working. Thank you all and hopefully this can help someone else in the future.
colbyfink said:
I've done some searching and come up with nothing so maybe I'm overlooking something or I need help. I flashed the AOSP ROM and was attempting to clear out the SD card and make sure everything was in its place when I rebooted my phone only to be greeted with a LG logo for a second or two followed by a black screen and nothing else. The first thing I tried was to reboot into recovery and it didn't go. So then I tried to power the phone off and make sure I was hitting the combo correctly and got nothing. Again. So I'm scratching my head wondering what to do next. I though I might need to use LGNPST but I can't find a download for it (I will join the IRC and get it that way if I need to but I wanna be sure before bothering anyone in there). What do I need to do? Am I SOL? Is there anything I can check for to see just how bricked I am? Thanks for the help and I'll keep looking while I wait for replies. I appreciate it, guys.
Click to expand...
Click to collapse
Can you get into download mode.
xxgmon3yxx said:
Can you get into download mode.
Click to expand...
Click to collapse
Yes, I can.
Went ahead and found LGNPST and the instructions to use it. It should all put me back where I need to be but if it doesn't for some crazy reason then I'll bump the thread.
Alright, I thought LGNPST would work but I'm missing something apparently. I'm getting a reboot at 67%, which is normal, and then LGNPST jumps to 85% which I assume is also normal. After that the phone does the at&t boot animation and sound and then it just hangs up at "Rethink Possible" with LGNPST saying it was disconnected and to cycle the power (which I have tried, and I also tried just letting it boot, and rebooting and letting it boot and they all yield the same results). What is going on? What am I missing here? I've tried on a desktop running XP and a laptop running Windows 7 and the phone is still booting to the animation and seems to be working alright from a hardware standpoint so I don't know what the deal is. I'm gonna keep trying but any help or troubleshooting steps I should try would be greatly appreciated. I'm sorry for the triple post, as well. I just really would like to get this fixed tonight so I can sleep haha.
Edit: I'm gonna charge it while I sleep and see if anything changes. It will charge and I charged it for about 45 minutes before trying LGNPST after I found out it would charge. When it first came on it said the battery was too low and it needed to before booting so maybe that's my issue with it booting the new rom or finishing LGNPST. To get to where I am all I did was flash AOSP coming from SnowJB (the LGOG version, NOT the N4 conversion version) and tried to clear out my SD card. I'm guessing that's where I messed something up but it could have been anything, including a hardware failure. I've read about a lot of folks having a similar issue with no resolution and either saying they'll return it or the thread dead ends and nothing else is said. If anyone has any advice I'd appreciate it and if charging helps then I'll report back as well so as not to leave anyone hanging if they stumble upon this thread and need help. I also think it's time for a LGNPST thread with links to the program and steps on how to use it and all that jazz to culminate all these issues. I'm not sure why it has to be so hidden and hard to get to.
LGNPST can't be shared publicly due to legal reasons. To get your phone to boot try a hard reset. From powered off state hold volume down and power buttons. When screen appears select reset.
Edit...If that doesn't work your miscellaneous partition may be messed up, Shelnutt2 on irc can help with that.
If this is the same problem I would try this http://forum.xda-developers.com/showthread.php?p=38571768
Sent from my LG-E970 using xda premium
Dr0!dFreek said:
If this is the same problem I would try this http://forum.xda-developers.com/showthread.php?p=38571768
Sent from my LG-E970 using xda premium
Click to expand...
Click to collapse
Alright, I ran across that last night and thought about trying it. Do I do that with command prompt or what? Usually I wouldn't ask that but I've never done anything quite like this. And thank you for your help. I appreciate it a lot.
adfurgerson said:
LGNPST can't be shared publicly due to legal reasons. To get your phone to boot try a hard reset. From powered off state hold volume down and power buttons. When screen appears select reset.
Edit...If that doesn't work your miscellaneous partition may be messed up, Shelnutt2 on irc can help with that.
Click to expand...
Click to collapse
I didn't even think about retrying a hard reset after I got it to go as far as the boot animation. It worked! Thank you, so much. And everyone who replied thank you too! Thank you guys so much. If I had more than just thanks I would surely give it.

[Q] SGSIII reboots just after start.

Hi. I have a SGSIII which doesn't work properly. Its previous owner told me that the phone had started work slowly so the owner decided to restore factory settings. After that operation he was not able to use SGS. It keeped restarting. He gave up and now this telephone belongs to me. When I try to run this phone telephone restarted as soon as the system started. I decided to flash SGS with stock firmware. I found the one which contained only one file (PDA). Unfortunately it didn't help me. Then, I installed CWM and CM11. But the problem still wasn't solved. Finally I decided to find four-file stock rom (Bootloader, PDA, PHONE, CSC), of course I still have the same problem. I've been looking for solution in the Internet and I'm afraid that could be hardware problem, what is more, it seems to be common. Do you, guys, have any ideas what can I do to fix this issue? Or can you confirm that is the hardware problem? Thanks in advance.
dzeju555 said:
Hi. I have a SGSIII which doesn't work properly. Its previous owner told me that the phone had started work slowly so the owner decided to restore factory settings. After that operation he was not able to use SGS. It keeped restarting. He gave up and now this telephone belongs to me. When I try to run this phone telephone restarted as soon as the system started. I decided to flash SGS with stock firmware. I found the one which contained only one file (PDA). Unfortunately it didn't help me. Then, I installed CWM and CM11. But the problem still wasn't solved. Finally I decided to find four-file stock rom (Bootloader, PDA, PHONE, CSC), of course I still have the same problem. I've been looking for solution in the Internet and I'm afraid that could be hardware problem, what is more, it seems to be common. Do you, guys, have any ideas what can I do to fix this issue? Or can you confirm that is the hardware problem? Thanks in advance.
Click to expand...
Click to collapse
Dont know much but as long as the phone boots i dont think it should be a hardware problem but still it can be. Did you try takimg it to service?
bolt890 said:
Dont know much but as long as the phone boots i dont think it should be a hardware problem but still it can be. Did you try takimg it to service?
Click to expand...
Click to collapse
Well I haven't tried taking it to service, because I am not sure if it is worth to repair this. Replacing the motherboard will be expensive so the better way will be buying another phone.
It could be a stuck power button... that can cause bootlooping type behavior. If the phone turns itself on when you put the battery in, but then reboots before it gets done booting it's likely the power button.
Kemotar said:
It could be a stuck power button... that can cause bootlooping type behavior. If the phone turns itself on when you put the battery in, but then reboots before it gets done booting it's likely the power button.
Click to expand...
Click to collapse
I don't think so the power button is guilty, becaue the telephone doesn't turn itself and it doesn't reboot until Android starts.

LG V10 Froze at logo screen PLEASE help cant find any answers

Okay so my phone randomly rebooted 2 days ago and when it got to the LG logo screen it froze. I tried to hard reset it, i went in to the hard reset menu clicked yes once then confirmed the hard reset by selecting yes a second time and the phone froze on highlighted yes. I have pulled the battery and tried to do this multiple times to no avail. So next i went to my PC and started google searches. Often i found things such as being stuck in boot loop which my phone wasn't, it was just frozen at the LG logo screen. Regardless I like to think of myself as self educated tech savvy (which now from reading all of your posts im not, im not even a little bit, in fact im tech stupid.) I did follow post through to the LGUP tool and downloaded a stock KDZ and got my phone into download mode>firmware update screen, i was able to get al the correct drivers and get LGUP to recognize the device and i loaded the stock KDZ and tried to do a Complete wipe reinstall. The program as able to interact with my device and went through the process, i thought i had fixed my phone. After a fresh install(or what i thought was a fresh install) i rebooted after the update and went to the LG logo screen and froze. The only difference is now when my phone starts, right before the LG logo appears i get the green android robot with what looks like open working "guts" real quick before it goes to the Logo and freezes. So back to the drawing board and i wanted to attempt some of the things ive seen like TWRP recovery etc but here i am getting lost. Forgive me if im posting things that have been answered but i keep getting confused. I dont know what the difference is between fastboot boot loader recovery mode or any of that is. also i kept noticing time and time again that my phone has to be in USB debugging mode and i dont know if it is. I cant turn my phone on to get it into USB debugging mode now anyways. Im okay with my warranty being voided and im okay with rooting if thats what i have to do to make it work. I have installed ADB and fastboot and some twrp recoveries etc but im clueless. Lastly know that i never Rooted my phone or anything but i was a torrent downloader. forgive me im triyng to provide as much information as possible.
PLEASE NOTE - I had to sign up to post here obviously and i loved how it said if you have an IOS go buy an android and come back LOL
Message Tung Kick. He can get u out of anything
Hit thnx if this helpd
tried
joshualuna said:
Message Tung Kick. He can get u out of anything
Hit thnx if this helpd
Click to expand...
Click to collapse
i tried to message tung kick and it said user not found?
sjeffreysmith said:
i tried to message tung kick and it said user not found?
Click to expand...
Click to collapse
Use Messenger on FB
i appreciate the resonse
joshualuna said:
Use Messenger on FB
Click to expand...
Click to collapse
is that the name to search for on fb? "tung kick"
sjeffreysmith said:
is that the name to search for on fb? "tung kick"
Click to expand...
Click to collapse
Try again on here but lower case and name is one whole wrd. tungkick
joshualuna said:
Try again on here but lower case and name is one whole wrd. tungkick
Click to expand...
Click to collapse
not having luck with him yet but ill keep trying. is there any other posts or something you could point me towards?
sjeffreysmith said:
not having luck with him yet but ill keep trying. is there any other posts or something you could point me towards?
Click to expand...
Click to collapse
http://forum.xda-developers.com/tmobile-lg-v10/development/debrick-phone-h901-qualcomm-9008-t3440359
This thread by him may help.
jsu718 said:
http://forum.xda-developers.com/tmobile-lg-v10/development/debrick-phone-h901-qualcomm-9008-t3440359
This thread by him may help.
Click to expand...
Click to collapse
SD card my only option?

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