Galaxy Tab S2 8.0 Stuck In Bootloop - Galaxy Tab S2 Q&A, Help & Troubleshooting

Hello,
Been given a couple of ex retail demo tablets to flash, both of them Tab S2's. First one went fine and dandy and is updated now with latest samsung OS with no knox issues.
The second however updated fine but wouldn't reset due to MDM (Brilliant.... knox being a tw##). So after a couple of resets an kicking knox into life it has now put the device into a starting screen bootloop. Trying to reflash using odin hasn't worked and all I can access is odin mode and the reboot/factory reset screen.
Factory reset won't work as it's coming up saying MDM not allowed blah blah.
Help would be greatly appreciated on this one.
Thanks
X

Ok managed to fix my own problem. Flashed over TWRP and used auto root using odin.
Once in there I used TWRP to format the device removing the encryption, then rebooted. Low and behold samsung welcome screen.
Once I knew the device was fine went back into odin and reflashed the OEM firmware back on and factory reset the device.
Don't understand why 3 out of the 4 devices I was given reset out of retail demo mode fine with odin but this one was a c##t.
Thanks
X

Related

Phone wont start up, has anyone had this problem?

So I decided to flash a rom. I haven't done so on this galaxy s6 edge. I've always done it on my previous galaxy phones. The phone already had all the pre-reqs for EXTREME SYNDICATE. Once the phone rebooted to download, I used odin to push out the new OE2 FLASH ME. After that was done the phone just went into a boot loop. I double checked and made sure all the files were correct.
Now I am at a point where even using odin with stock image just goes to samsung splash screen and song then just gives me a Startup Failed - Please connect verizon repair etc.
Is there anything I can do on my end or am I screwed with this phone now. I can still go to download mode and the recovery mode that lets me wipe, reboot etc. But nothing seems to work. Unless I am missing something here.
All help is appreciated, thanks!
Mods can close this thread. I tried everything. Eventually flashing different OE2 and OF1 finally got it working even though I flashed the stock ....

Stock SM-G925V Bootloop after 5.1.1 OTA

My S6 edge is in a bootloop. I put off the 5.1.1 OTA for a while when my wifi would not turn on. Rebooted, still didnt work. I decided to do the update. installation went great but now its in a boot loop. I flashed the firmware (BOG7) using Odin. It worked. The phone was back on again but then it shut off after a few hours.
Its been stuck in the bootloop again. I flashed BOG7 again. Ive Flashed BOG9. Ive flashed the stock PIT. Ive tried ADB sideload. Smartswitch and Kies do not recognize the device. Of course, Ive wiped cache and factory reset. Attempted booting in safemode. All flashes were successful but when it reboots, It says "erasing" and goes to bootloop (Samsung powered by android).... Drivers are installed and working. MTP is not installed and I cant find the file.
Please .
same problem
I'm having the same problem with boot loop on g925v stock. I'm wondering if the op or anyone else can help!
No mater what I do, phone reboots after almost exactly 1min9 sec. Just enough time to select a language, but not get past the next "activation" screen.
Background: Phone has never been rooted, at first was on og5 and started freezing on the verizon logo, so I factory data reset, and after that nothing has really changed. knox has not been tripped, frp not tripped
First I tried flashing og5 with odin,
(of course checked md5, and odin=pass, then after flashing, I always tried several combinations of booting to recovery for wipe cache partition/ factory reset / and also power down by holding volume down and power button, then select boot in safe mode)
Then tried flashing og7, still boot loop
then tried flashing og9, 3 times, again, also many attempts of factory data reset/ wipe cache partition / safe mode.
I am starting to think this may be a hardware problem, BUT unfortunately I do not have samsung warranty available on this phone so I am pretty much stuck messing with it.
In researching the issue, I have run across quite a few similar freeze/boot loop problems all over the web, and never any real solutions, for both g925v, g920v, and other s6 models. I've also seen a stock s6 g920v that freezes randomly, flashing stock og9 never helped, owner was planning to replace the battery and see if that helps (I have not heard back).
I've tried looking at the boot log but I'm no expert. I know I can't downgrade, but I'm wondering if there is anything I can do with adb, or any other bootloaders that I could try flashing over the og9 (even if just temporarily, assuming I will flash stock og9 again after).
Thanks for any encouragement, help or advice.
I finally gave up on my GS6 Edge because upon carefully taking it apart for the 3rd time I noticed physical damage up by the wifi receiver and SIM card slot. My advice would be to try the things I tried (above) and, if it's not a hardware issue, it may fix the problem. Good luck.
beefriendly said:
I'm having the same problem with boot loop on g925v stock. I'm wondering if the op or anyone else can help!
No mater what I do, phone reboots after almost exactly 1min9 sec. Just enough time to select a language, but not get past the next "activation" screen.
Background: Phone has never been rooted, at first was on og5 and started freezing on the verizon logo, so I factory data reset, and after that nothing has really changed. knox has not been tripped, frp not tripped
First I tried flashing og5 with odin,
(of course checked md5, and odin=pass, then after flashing, I always tried several combinations of booting to recovery for wipe cache partition/ factory reset / and also power down by holding volume down and power button, then select boot in safe mode)
Then tried flashing og7, still boot loop
then tried flashing og9, 3 times, again, also many attempts of factory data reset/ wipe cache partition / safe mode.
I am starting to think this may be a hardware problem, BUT unfortunately I do not have samsung warranty available on this phone so I am pretty much stuck messing with it.
In researching the issue, I have run across quite a few similar freeze/boot loop problems all over the web, and never any real solutions, for both g925v, g920v, and other s6 models. I've also seen a stock s6 g920v that freezes randomly, flashing stock og9 never helped, owner was planning to replace the battery and see if that helps (I have not heard back).
I've tried looking at the boot log but I'm no expert. I know I can't downgrade, but I'm wondering if there is anything I can do with adb, or any other bootloaders that I could try flashing over the og9 (even if just temporarily, assuming I will flash stock og9 again after).
Thanks for any encouragement, help or advice.
Click to expand...
Click to collapse

note 5 wont work properly after root

Okay so i rooted my galaxy note 5 n920r4 after i got marshmallow it worked but most of the stuff i had wasnt working as it did before so me not thinking clearly tried to put the factory kernel into odin and i messed it up into a boot loop where all it shows was the galaxy logo i tried the unroot marshmallow n920r4 kernel it did finaly turn on and didnt turn into boot loop except it seems like a lot of essential things were deleated like google services samsung account was signed out of and it says touchwiz is not installed i dont know what to do the only thing i could think of was factory reseting gladly i did back up my photos but everything else will be a pain to do such as setting up my apps and sighning back into my accounts if anyone could please help me im still pretty knew at this. thank you!!
DaveGIGGITYGOO said:
Okay so i rooted my galaxy note 5 n920r4 after i got marshmallow it worked but most of the stuff i had wasnt working as it did before so me not thinking clearly tried to put the factory kernel into odin and i messed it up into a boot loop where all it shows was the galaxy logo i tried the unroot marshmallow n920r4 kernel it did finaly turn on and didnt turn into boot loop except it seems like a lot of essential things were deleated like google services samsung account was signed out of and it says touchwiz is not installed i dont know what to do the only thing i could think of was factory reseting gladly i did back up my photos but everything else will be a pain to do such as setting up my apps and sighning back into my accounts if anyone could please help me im still pretty knew at this. thank you!!
Click to expand...
Click to collapse
Sounds like you tripped the Knox efuse.. Did you? Does it say 0x1 or 0x0 on the bootloader info screen?
DaveGIGGITYGOO said:
Okay so i rooted my galaxy note 5 n920r4 after i got marshmallow it worked but most of the stuff i had wasnt working as it did before so me not thinking clearly tried to put the factory kernel into odin and i messed it up into a boot loop where all it shows was the galaxy logo i tried the unroot marshmallow n920r4 kernel it did finaly turn on and didnt turn into boot loop except it seems like a lot of essential things were deleated like google services samsung account was signed out of and it says touchwiz is not installed i dont know what to do the only thing i could think of was factory reseting gladly i did back up my photos but everything else will be a pain to do such as setting up my apps and sighning back into my accounts if anyone could please help me im still pretty knew at this. thank you!!
Click to expand...
Click to collapse
The only thing you can do is reflash back to stock using odin. If you want your phone working again. If it boot loops after flashing you will have to start your phone in recovery mode by pressing the volume up, home and power at the same time and doing a factory reset from recovery, but I have to warn you if you have to do a factory reset you will lose all your data. Such as photos, music etc.
Sent from my SM-N920W8 using XDA-Developers mobile app
Loop after root
My Samsung note 5 gone into an endless loop after I root it using space X and odin3 files and appropriate procedure. A slightly different problem form lildoggs.
Kouto
khufuson said:
My Samsung note 5 gone into an endless loop after I root it using space X and odin3 files and appropriate procedure. A slightly different problem form lildoggs.
Kouto
Click to expand...
Click to collapse
Wipe Cache/Data and Factory Reset from recovery.
If not, then you can flash the stock firmware via Odin.

Wife turned on knox enterprise on phone. Dm-verification failed.

Hi Everyone,
I've not needed to come to this group in a long time but my wife turned of knox enterprise on her Samsung S6 and when it rebooted it was just stuck. I rebooted to recovery mode and found the dm-verity verification failed. Now I've found the stock firmware for phone and I could do a full factory restore but all of her work is on this phone plus our children's photos of the last two years. Since its the bootloader (BL_G920AUCU1AOE2_CL4823236_QB4834510_REV02_user_low_ship.tar.md5) could I just flash that? I can't ADB into the phone I've tried many times and the devices show nothing. After we get the photos off with everything else then I could do a factory reset.
Thank you, Jason Nulph
So I found the solution
Hi Everyone,
I found the solution, I decided to flash the bootloader with BL_G920AUCU1AOE2_CL4823236_QB4834510_REV02_user_l ow_ship.tar.md5 and rebooted and that didn't work. So I decided to do it again because I read somewhere (and I really don't remember because I did so much reading) go to options in Odin 3.10.6 and pick Phone EFS Clear. I did that and shut the phone down and it booted into the OS.
Now Dm-verification failed is still there but I don't care because I was able to back up all her photos to our google drive 100BG $1.99 a month and she is one happy gal. I rebooted it again and its hung and won't boot into the OS.

Samsung Galaxy s5 Active ATT Flash stock ROM

I have a phone that I am trying to get working for my wife because we ran over her own S5 (long story)
Phone worked perfectly so I was like, cool, factory reset and put her SIM in. No problem right? WRONG!
Factory reset the phone and now it only gets to the ATT logo, then nothing else.
I have booted in recovery mode and cleared cache and reset the device. Still stuck on ATT logo.
I think I might have a corrupted ROM on my phone so I went searching for a firmware for this phone, which does not seem to exist anywhere on the internet.
Model is Sm-g870a
No damage to phone, like I said everything worked before factory reset. I tried one ROM that i found but it is not the correct version (footer is wrong and signature verification failed errors)
All I need is the STOCK ROM for this. Not rooted and no mods to any of the files.

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