[Q] My galaxy s2 doesn't boot - Galaxy S II Q&A, Help & Troubleshooting

Today, while my phone was in my pocket, it rebooted itself and stuck at boot screen of galaxy s2. I didn't make any changes on the phone, it was running good. What can cause a problem like that ? I have some pics and videos on internal memory of the phone, i also don't want to lose them.
Thats what i tried :
* Download mode
I tried to re-install stock kernel to phone using odin, but odin didn't see the phone using usb cable. So i've failed to install new kernel, or any non-wipe firmware.
*Also tried recovery mode
Done a cache-wipe, the phone still crashes on boot screen.

Umutcan said:
Today, while my phone was in my pocket, it rebooted itself and stuck at boot screen of galaxy s2. I didn't make any changes on the phone, it was running good. What can cause a problem like that ? I have some pics and videos on internal memory of the phone, i also don't want to lose them.
Thats what i tried :
* Download mode
I tried to re-install stock kernel to phone using odin, but odin didn't see the phone using usb cable. So i've failed to install new kernel, or any non-wipe firmware.
*Also tried recovery mode
Done a cache-wipe, the phone still crashes on boot screen.
Click to expand...
Click to collapse
When you say re-install stock kernel, did you flash another kernel?
Odin is not detecting your phone? Nothing showing up in ID:COM when you connect your phone in download mode?

Related

[Q] Galaxy S2 hangs on boot screen..no recovery mode

I installed the latest nightly build (cm_galaxys2_full-88.zip) on my phone yesterday night and restored the all the apps through Titanium Backup. Everything was working fine until this morning I tried to create a backup using CWM recovery in Rom Manager. The phone shut down and has since been stuck on the initial boot screen (one with the Samasung galaxy S2 logo). It does not boot into recovery mode using the button combinations. I can only get it into download mode but Odin does not recognize it as I thing i forgot to enable USB debugging.
I have tried removing the battery and rebooting and also tried to access it through odin a number of times. But nothing seems to work.
What am I missing here ?
This might help?
mjondj said:
I cannot boot into recovery, but I can boot into download. However, odin is no longer recognizing my GS2 when I plug it into my PC.
The bootloop began when I was attempting to flash the cyanogen7 with the google apps.
I read every post in this thread, and have seen a number of people who cant boot into recovery, but can boot to download. I haven't seen anyone else mention that their phone is no longer recognized by odin on their pc.
Please help.
edit:
Perhaps odin doesn't see my phone because I didn't have USB debugging enabled? if that's the case, what can I do?
------------------------------------------------------------------------------------------------------------------
solved:
heimdall overwrites a driver and stops odin from seeing your phone. i attempted to remove it, unsuccesfully. but loaded odin onto a different computer (that had never seen heimdall).
i booted into download, connected to 2nd pc w/ odin, and ran CF-Root-SGS2_XW_NEE_KI8-v4.3-CWM4.tar (search forum) in PDA. this made my phone bootable again.
Click to expand...
Click to collapse
also check that you dont have kies running on your pc
icecreampop3 said:
This might help?
also check that you dont have kies running on your pc
Click to expand...
Click to collapse
Thanks. Although that did not do what I expected it to (due to some license issues), but it got me into recovery mode from where I could restore a Nandroid backup. Am back on RevolutionROM for now. Looks like CyanogenMod will have to wait for me.
I experienced the very same thing for the first time today. Had checkrom revolution and ran rom manager to backup and am now unable to boot into recovery/download. Will try to hook it to odin then

[Q] Upgraded from Froyo to GB, now phone wont boot without USB

Here's what happened:
1. Original firmware was Froyo 2.2.1 S5830DXKC1.
2. Flashed to official Gingerbread 2.3.4 S5830DXKPB with Odin 4.38.
3. Rebooted into recovery and wiped cache, data.
4. Rebooted phone and started as normal.
So I off it and tried switching on, failed, nothing happened, just black screen.
Also fails at starting in recovery mode.
However I tried and was able to do these:
- While connected to USB, went into 'Downloading' mode.
- While connected to USB, went into recovery mode.
- Went into Ramdump mode without USB.
It only boots when connected to USB, and fails without it.
Did I installed a wrong firmware?
Kernel: 2.6.35.7.perf-CL514579
Baseband: S5830DXKPB
Try rebooting in recovery mode .
May I know which variant of the S5830 are you using ?
This was sent from a Galaxy Ace. Problem?
EmoBoiix3 said:
Try rebooting in recovery mode .
May I know which variant of the S5830 are you using ?
This was sent from a Galaxy Ace. Problem?
Click to expand...
Click to collapse
Which variant means?
Its a 2nd hand phone.
I can go into recovery only while connected to usb.
sounds like a bad flash, try flasing via odin again?
stupotty1210 said:
sounds like a bad flash, try flasing via odin again?
Click to expand...
Click to collapse
Yes I've flashed it back to Froyo and it boots as normal.
Its only after I've flashed with other firmwares, it wont boot without USB connected.

[Q] Samsung Galaxy SII HD LTE Stock Recovery Problems

Hello, I have a Samsung Galaxy SII HD LTE (SGH-1757M) on Bell (Canada).
I've been having some problems with this phone and I really need some help.
Okay so I need to flash stock firmware onto my phone, but I can't use ODIN or Kies because my computer will not recognize my phone (USB port damage). So I've been trying to use the Stock Recovery on the phone but every time I try to flash it, my phone just reboots and reloads Stock recovery and doesn't do anything after that. I have to pull my battery out to restart the phone normally. What I did was download my stock rom for my phone (correct region, and firmware) and when I tried to flash the .zip file it said "E:verification failed" so I unzipped it and tried the md5 file and this time it takes a little while then the screen flashes black then restarts the Stock Recovery UI but then freezes and I am forced to pull the battery out.
The reason I want to reflash my rom is because my phone acts very odd. If I try to shut down my phone it just reboots, I can't charge my phone (have to use other Samsung phone to charge battery), computer won't recognize phone.
Thank you in advanced! :fingers-crossed:
natemac1 said:
Hello, I have a Samsung Galaxy SII HD LTE (SGH-1757M) on Bell (Canada).
I've been having some problems with this phone and I really need some help.
Okay so I need to flash stock firmware onto my phone, but I can't use ODIN or Kies because my computer will not recognize my phone (USB port damage). So I've been trying to use the Stock Recovery on the phone but every time I try to flash it, my phone just reboots and reloads Stock recovery and doesn't do anything after that. I have to pull my battery out to restart the phone normally. What I did was download my stock rom for my phone (correct region, and firmware) and when I tried to flash the .zip file it said "E:verification failed" so I unzipped it and tried the md5 file and this time it takes a little while then the screen flashes black then restarts the Stock Recovery UI but then freezes and I am forced to pull the battery out.
The reason I want to reflash my rom is because my phone acts very odd. If I try to shut down my phone it just reboots, I can't charge my phone (have to use other Samsung phone to charge battery), computer won't recognize phone.
Thank you in advanced! :fingers-crossed:
Click to expand...
Click to collapse
Replace USB port first...get it from eBay.

[Q] Samsung Vibrant (I know it is a little old but i still like using the phone)

So i recently tried to flash my phone to cynagenmod and i was intensely close to doing so until i noticed what i did wrong.
But then when i rebooted my phone after using clockwork, my phone would not boot up after the start screen.
I am able to use recovery mode and download mode but i cannot go anywhere beyond that.
I also tried restarting it with Odin but it wont recognize the device even though the proper drivers have been installed.
I have tried unplugging it in different usb slots and ive reinstalled Odin.
Is there anyone that could possibly help?
Just get back to recovery and flash the rom, many times if coming from a different version (2.2-->4.2) it requires more than 1 flash
Nexus⁴ PAC 360° Productions
Try this: http://forum.xda-developers.com/showthread.php?p=44794712
And 2 posts down I explain what I did

Phone Not Starting After Flashing new CWM

Hello all,
I've encountered a problem with my Straight Talk Galaxy S II S959G after flashing the CWM from this thread:
http://forum.xda-developers.com/showthread.php?t=2559694
I was running 6.0.1.2 or something along those lines. And I was running the 4.2.2 SuperNexus ROM. I can only get to the Samsung Galaxy S II screen and then it goes blank, but does not shut off, as my computer recognizes as being on. However, I cannot DO anything with it even though it can be connected to my computer. Odin v1.85 does not seem to recognize it either.
If someone could help, it would be much appreciated.
It sounds like you just have a soft brick if you're still getting the Samsung logo.
ODIN is intended to be used in download mode. Are you able to get into download mode (hold vol +/vol -, then plug in the USB cable)? If so, you should be able to reflash the kernel, assuming that's what broke. I like to keep an ODIN flashable full stock ROM (minus bootloaders) handy in the event that I mess things up badly.
I don't have experience with the specific ROM you are trying to flash (I was actually planning on playing around with that one soon).
jpasher said:
It sounds like you just have a soft brick if you're still getting the Samsung logo.
ODIN is intended to be used in download mode. Are you able to get into download mode (hold vol +/vol -, then plug in the USB cable)? If so, you should be able to reflash the kernel, assuming that's what broke. I like to keep an ODIN flashable full stock ROM (minus bootloaders) handy in the event that I mess things up badly.
I don't have experience with the specific ROM you are trying to flash (I was actually planning on playing around with that one soon).
Click to expand...
Click to collapse
I'm not very experienced with all of this, but, I have tried Odin mode. My computer does not recognize my phone when it is plugged in.
I do have the stock rom that my phone came with too, but I do not have a Samsung official USB cable to use with it, which, supposedly, is required for this to work. And I do not know if my Odin version on my computer is outdated either.
Epications said:
I'm not very experienced with all of this, but, I have tried Odin mode. My computer does not recognize my phone when it is plugged in.
I do have the stock rom that my phone came with too, but I do not have a Samsung official USB cable to use with it, which, supposedly, is required for this to work. And I do not know if my Odin version on my computer is outdated either.
Click to expand...
Click to collapse
Many usb cables will work just fine. The original cables are known to be of good quality. Odin3 v1.85 is recommended for this phone, although any version of Odin should work.
Did you open Odin on the desktop before putting the phone into download mode? Sometimes the problem is as simple as wrong sequence.
If you have a USB jig, use that to put the phone into download mode. Then connect it to the computer while Odin is open on the desktop.
Make sure you have the correct driver installed. You should have "SAMSUNG USB driver for mobile phones" in your add/remove programs dialog in windows. If not, install it. If so, uninstall it, reboot, reinstall it.
Try different cables, different usb ports, even different pc's.
I'll try not to butt in too much, since creepyncrawly obviously has a lot of experience.
(at this point, I'm assuming you're on Windows)
Like he said, it's sounds like it's most likely a driver issue. When you first plugged in the phone, did you get a Windows balloon notification saying "Installing drivers"? If you open up device manager, do you have any devices with an exclamation point next to them, indicate a device that failed to start? If so, make sure the Samsung drivers are installed.
A USB jig is definitely nice to have handy. I use this one (as long as you can wait a few weeks on shipping). If you can get into download mode, your bootloaders are probably safe (meaning you should be able to recover easily).
I actually installed that CM11 ROM yesterday on my SGH-I777 (I can't say anything specific about your model and how it may differ, but it seems to basically be the same phone as the I777). I was running stock non-rooted JB 4.1 with stock recovery, so I had to take a little more of a convoluted route to get there.
In the end, here's the thread for you. Once you can get ODIN download mode working again, you should be well on your way to fixing it (flash CWM 6.0.4.5 from ODIN, boot into recovery, then try the ROM install again).
Well, I've tried flashing CWM again using Odin. While I actually can USE Odin this time, it just isn't working... My phone still only turns on and goes blank after the Galaxy S II screen.
I had something similar happen the other night when I flashed a kernel that was apparently incompatible with my Captivate (although it should have been fine). The phone would get stuck on the Galaxy S boot screen. I had to reflash a known good kernel to get it working again.
If you can get into the recovery, you can try a wipe/factory reset + wipe cache.
Is ODIN detecting the phone but just failing to flash the files? What error is it getting?
If ODIN is flashing the files properly, but still preventing full boot up, it's probably easiest at this point to flash back to a stock ROM. The previous thread link has the instructions and flash files (I personally have an S2, not an S959G, so it's a slightly different process).
Hi - I don't know if it is a completely outdated method, but this worked on my father's SII skyrocket yesterday when I was encountering a similar softbrick issue:
Get zadig (http://zadig.akeo.ie/), start zadig, get the phone in download mode, hit Options -> List All Devices, select the Samsung or similar device from the dropdown and replace the default USB driver.
Then use heimdall (http://forum.xda-developers.com/showthread.php?t=755265) to flash in a replacement recovery.
Double check that your phone is detected in download mode: heimdall detect
Then flash the recovery: heimdall flash --RECOVERY recovery.img (try CWM for your phone version)
(some places will have you add --no-reboot. that didn't work for me. let it auto reboot)
After it powers down, quickly disconnect the USB cable and put your fingers on the +/- buttons to get into recovery mode. From there push over whichever ROM via adb, etc. etc.
jpasher said:
I had something similar happen the other night when I flashed a kernel that was apparently incompatible with my Captivate (although it should have been fine). The phone would get stuck on the Galaxy S boot screen. I had to reflash a known good kernel to get it working again.
If you can get into the recovery, you can try a wipe/factory reset + wipe cache.
Is ODIN detecting the phone but just failing to flash the files? What error is it getting?
If ODIN is flashing the files properly, but still preventing full boot up, it's probably easiest at this point to flash back to a stock ROM. The previous thread link has the instructions and flash files (I personally have an S2, not an S959G, so it's a slightly different process).
Click to expand...
Click to collapse
It says Odin is successful, but still nothing happens. And I cannot get into recovery no matter how many times I try.
It seems flashing the stock ROM with Odin has worked now, but, now my phone has the tracfone start up animation just looping over and over.
Epications said:
It seems flashing the stock ROM with Odin has worked now, but, now my phone has the tracfone start up animation just looping over and over.
Click to expand...
Click to collapse
Boot into recovery and wipe caches; sometimes you have to do an extra wipe to get out of this type of bootloop.
SteveMurphy said:
Boot into recovery and wipe caches; sometimes you have to do an extra wipe to get out of this type of bootloop.
Click to expand...
Click to collapse
I'm having difficulties booting into recovery.
Epications said:
I'm having difficulties booting into recovery.
Click to expand...
Click to collapse
If you have the stock boot animation you should have recovery. Take the battery out, then put it back in and hold power+volume +/- until you get recovery. I have sometimes had to do this extra step after restoring stock.
Make sure your phone isn't plugged in while you're trying this, btw.
grand quattro CWM TRAPPED
Epications said:
Hello all,
I've encountered a problem with my Straight Talk Galaxy S II S959G after flashing the CWM from this thread:
http://forum.xda-developers.com/showthread.php?t=2559694
I was running 6.0.1.2 or something along those lines. And I was running the 4.2.2 SuperNexus ROM. I can only get to the Samsung Galaxy S II screen and then it goes blank, but does not shut off, as my computer recognizes as being on. However, I cannot DO anything with it even though it can be connected to my computer. Odin v1.85 does not seem to recognize it either.
If someone could help, it would be much appreciated.
Click to expand...
Click to collapse
HI BROOOO I M A GRAND QUATTRO USER EVERYTIME I SWITCH ON MY CELL MY CELL DIRECTLY GOES IN CWM MOD M WORRIED ALOT HELPPPPPPPPPPP ME

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