Samsung S7 Freeze and Boot Loop. - Device Repair

Switched phone on after work, phone powers up, boots up and then freezes after around 20 secs then switches off and re-boots, the process then starts again over and over again.
I've tried deleting cache, master reset, safe mode, simulated battery reset which does not work. I let the battery run flat by putting the phone into download mode and then recharged the battery but still nothing. The phone seems stable only in download mode.
I managed to re-install stock 7.0 firmware via Odin. Firmware installs fine, phone boots up and then freezes on welcome screen and then boots up again. I then tried 6.0.1, again installs fine, I get the welcome set up screen but after a 20 odd secs freezes up again.
The phone is less than two years old. Samsung service centre warranty job? Thanks.

Yes, in this case it probably seems an issue which can be solved by the service centre.
Sent from athene

I know this is old, but for anyone else with similar problems, have you tried flashing with Odin after erasing everything via recovery?

Related

[Q] Bootloop, can't get phone to stay in Download mode to reflash

Hi all
I reflashed an old i9000 with CM10.1 for my wife recently, and everything seemed to be working fine. Then it started behaving a bit funny and this week it started rebooting at random. I thought "no worries, I'll just do a fresh flash with stock GB".
However, before I could even give that a go the phone started acting even weirder. As soon as I put the battery in it powers on (without me even pushing the button) but it resets every time it hits the Samsung splash screen. Earlier today I could get it to go into CWM recovery and after clearing cache I actually got it to boot up. But by the time I had downloaded the stock GB files the phone was just constantly resetting at the Samsung logo and now I can't even get it to load CWM recovery using the 3-button method.
I can get it to enter Download mode, and it shows up in Odin just fine. But within 5 seconds it resets itself again so I can't actually perform a flash.
Any suggestions? Or is the phone just plain busted?
mrfurion said:
Hi all
I reflashed an old i9000 with CM10.1 for my wife recently, and everything seemed to be working fine. Then it started behaving a bit funny and this week it started rebooting at random. I thought "no worries, I'll just do a fresh flash with stock GB".
However, before I could even give that a go the phone started acting even weirder. As soon as I put the battery in it powers on (without me even pushing the button) but it resets every time it hits the Samsung splash screen. Earlier today I could get it to go into CWM recovery and after clearing cache I actually got it to boot up. But by the time I had downloaded the stock GB files the phone was just constantly resetting at the Samsung logo and now I can't even get it to load CWM recovery using the 3-button method.
I can get it to enter Download mode, and it shows up in Odin just fine. But within 5 seconds it resets itself again so I can't actually perform a flash.
Any suggestions? Or is the phone just plain busted?
Click to expand...
Click to collapse
I'm just going to answer my own question as I've solved the problem but it may benefit someone else to know how.
It got to the point where the phone wasn't even booting to the Samsung splash screen, but I could still get Download mode to show up for 5 seconds (not long enough to flash). Then in a moment of desperation I got the original Samsung microUSB cable and plugged that in, and booted into Download mode again. This time Download mode stuck! And I was able to flash a clean GB ROM which is now working fine.
So the take-out from my experience is this: sometimes you really do have to use the original Samsung USB cable.
Weird.
Thanks for reporting howto ...:good: good to know
mrfurion said:
I'm just going to answer my own question as I've solved the problem but it may benefit someone else to know how.
It got to the point where the phone wasn't even booting to the Samsung splash screen, but I could still get Download mode to show up for 5 seconds (not long enough to flash). Then in a moment of desperation I got the original Samsung microUSB cable and plugged that in, and booted into Download mode again. This time Download mode stuck! And I was able to flash a clean GB ROM which is now working fine.
So the take-out from my experience is this: sometimes you really do have to use the original Samsung USB cable.
Weird.
Click to expand...
Click to collapse
mrfurion said:
I'm just going to answer my own question as I've solved the problem but it may benefit someone else to know how.
It got to the point where the phone wasn't even booting to the Samsung splash screen, but I could still get Download mode to show up for 5 seconds (not long enough to flash). Then in a moment of desperation I got the original Samsung microUSB cable and plugged that in, and booted into Download mode again. This time Download mode stuck! And I was able to flash a clean GB ROM which is now working fine.
So the take-out from my experience is this: sometimes you really do have to use the original Samsung USB cable.
Weird.
Click to expand...
Click to collapse
I have a similar issue where I'm trying to flash my stock ROM on my Epic4gTouch. When it opens up the download mode error I start to flash and all seems to work before it reboots. Every 5 seconds. I tried the original cable and it did not help. Any ideas??
NerdsBestAdvice said:
I have a similar issue where I'm trying to flash my stock ROM on my Epic4gTouch. When it opens up the download mode error I start to flash and all seems to work before it reboots. Every 5 seconds. I tried the original cable and it did not help. Any ideas??
Click to expand...
Click to collapse
put the cable and press button power the phone go mode charging at this time make the phone in download mode
its ok for me:good:

Soft Brick

Hello,
Today, while I was using my phone, it restarted itself and has been stuck at a boot loop almost entirely since then. It has successfully booted up 2-3 times but will usually restart itself within 30-45 seconds of booting and then will be stuck in a boot loop again. When it has started up its usually after it has been bootlooping for a while. I'm rooted and using xTreme Rom v2.0. I have had occasional random reboots here and there before but the phone always booted right up again without any issues. I haven't done anything with root/recovery since early September.
I've tried doing a factory hard reset without any luck. My phone booted up after I tried the hard reset and it was like the reset didn't happen. I can't boot into TWRP. I can boot into download mode and I tried to reset using kdz. It got to 100% but the the phone restarts and is back in the boot loop (then the lg flash tool gets an error and force quits). I've tried removing my sd and sim cards, I've tried swapping to a different battery, I've tried leaving the battyer out and letting the phone cool down. Nothing is working. I have noticed that when the phone is going to boot up correctly the full LG animation plays. When the phone is going to boot loop I only get a static LG Powered by android image.
Any suggestions?
Since I tried to rest using kdz I can't get past the boot loop...Device also isn't recognized when using adb
edit: It booted up once this morning and went to the initial set up screen, like the kdz worked. But about 30 seconds-a minute later the phone locked up, rebooted and has been stuck in a boot loop since.
That's weird..
So the KDZ goes through all the way successfully.
Phone does the update all apps etc.. and it still boot loops after a while?
Which ROM version are you updating it back to?
My phone just did the exact same thing. I'm also on the Extreme Rom. Everything you described is my experience too. When I use the LG tool it goes all the way through and reboots the phone but just keeps bootlooping. Did you find a fix? I've tried everything i can think of. Probably going to take it in tomorrow and get warranty on it.
rectifiercc said:
My phone just did the exact same thing. I'm also on the Extreme Rom. Everything you described is my experience too. When I use the LG tool it goes all the way through and reboots the phone but just keeps bootlooping. Did you find a fix? I've tried everything i can think of. Probably going to take it in tomorrow and get warranty on it.
Click to expand...
Click to collapse
I used the following method:
http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
Download the correct KDZ file to flash back to and follow the rest of the instructions. You can also look at this video tutorial. https://www.youtube.com/watch?v=zXO2SHqBiNk
The one you'll want to try is "Normal Flash"
"CSE Flash" is a full wipe that deletes all data.
Mine was weird where it told me my phone disconnected, but the progress bar was still continuing. If that happens to you, don't hit cancel, let the progress bar finish to 100%

Note 5 stuck in loop while updating firmware at %24

Hi All,
Sorry if this is asked before. I have a new Note 5 unlocked. I turned it on yesterday and started using it. Late at night, its screen froze. I tried pressing Power+Volume_Down buttons to restart the phone. The phone restarted but the the screen was black. Only the notification light was on (blue).
In the morning, the light was still on and the phone was froze. I tried restarting it and I succeeded it. Then I realized the phone was very, I mean veeeery slow. By the time, a firmware update notification popped up. I believe it was Marsmallow update. I hit the yes button. The phone started the update and was stuck at %24. Then it restarted itself. The update process starts over and when it reaches %24, it starts over.
This happened before with my note 4 when I tried to root it. This phone is brand new and is not rooted. However, I transferred my Google profile but I did not select to download my previous apps. So, I don't think it is rooting issue but stucking at the same percentage makes me nervous.
I tried to get into recovery mode but the button combination does not work at all. So I can neither factory reset nor clear the cahe partition. When I press Volume_Down+Home+Power buttons, a custom rom download screen appears but Volume_Up+Home+Power buttons do not work at all. I cannot shut off the phone. It constantly restarts itself, starts the update, fails at %24 and starts the process over again.
What might be the problem? How can I fix this?
Regards
Hi,
Try flashing some stockfirmware via Odin (ideally something of the same android version i.e. lollipop/marshmallow). Once it's installed you should be able to access recovery from which I strongly recommend clearing your cache afterwards as you've already suggested. If you are not worried about loosing any data, then flash new firmware that is inclusive of BL/CP/CSC files too (each one has a category for such in Odin). With the latter, by all means flash marshmallow etc. :good:
Regards

Semi-bricked device and can't flash stock

Hello guys,
suddenly my Note 4 won't work anymore, it freezes and reboots every 30 seconds. The sim card won't be recognized and in the settings things like IMEI and the carrier are unknown. Deleting cache in recovery didn't solve anything. I didn't do anything, the phone wasn't rooted, I didn't try to flash something, it justs got semi-bricked one day! Then I got a new battery and then it worked again! At least for some hours. Then it froze and rebooted again.
So I tried to flash stock with odin. Didn't work, even with the pit file and different versions of odin. It stops right at the beginning.
It's a N910F if you want to know.
And yeah, KNOX counter still at 0x0. But I don't have warranty any more.
Thanks in advance!
When did this start? Funny thing I have a similar issue. Yesterday my phone was fine. Had it with me on my desk until I went to bed, plugged it in and thought nothing of it. About half hour after I get to sleep the phone reboots, I hear the TMO gingle. I paid no attention to it, about 15 minutes later it does it again. I shut it off and this morning it all went downhill. Phone won't stay on, keeps rebooting. It sometimes freezes and becomes unresponsive.. you name it, everything that could have gone sideways has.
Jhnsn said:
Hello guys,
suddenly my Note 4 won't work anymore, it freezes and reboots every 30 seconds. The sim card won't be recognized and in the settings things like IMEI and the carrier are unknown. Deleting cache in recovery didn't solve anything. I didn't do anything, the phone wasn't rooted, I didn't try to flash something, it justs got semi-bricked one day! Then I got a new battery and then it worked again! At least for some hours. Then it froze and rebooted again.
So I tried to flash stock with odin. Didn't work, even with the pit file and different versions of odin. It stops right at the beginning.
It's a N910F if you want to know.
And yeah, KNOX counter still at 0x0. But I don't have warranty any more.
Thanks in advance!
Click to expand...
Click to collapse
Probably your motherboard is dying.
Try to flash twrp recovery via odin and flash any rom and see if it works.
RIP mine is completely dead. Won't boot anything at all. Best of luck to you OP.
I have the same issue. Changed battery, nada. Flashed stock via odin, and it'll flash, and then it'll boot for a bit after flashing then freeze and go into bootloop, even if i try to boot into safe mode and try to boot into recovery. Flashing twrp with odin just makes it bootloop. I've tried every combination of things and can't get this thing to boot up properly. I'm convinced its a hardware issue.... perhaps processor going as someone above has mentioned?

stuck at Samsung logo, not charging, boot loop

Dear all,
I have a Samsung Galaxy Tab S2 8.0 WIFI purchased last year (exactly to the day) in Cali. I believe it came with 5.1.1 XAR version.
A month later, my troubles began. I flashed with 6.0 Samsung WIFI ROM from some other country and the tab soon started to randomly turn off while being used. I am not sure if this is coincidental or not. When restarted, it would sometime fully boot, only to turn off while doing any mundane task surfing etc. and at other times, start and turn off as soon as the SAMSUNG logo comes. Weirdly, when I wait a day or two, it would start fully and work for a few minutes to half an hour
When I put it to charge, only rarely does the green battery logo came up, but most frequently I got a flashing thunderbolt sign.
I sent it to Samsung and it came back apparently with the correct firmware installed and the repair note said, faulty data cable replaced. But in a week of usage, the same problems started. I don't live in the US currently and so I don't have local warranty and don't have any means to send it back to Samsung USA. I've tried all remedies I could find, charging it to 100%, holding volume down and power for 15-30 seconds to simulate a battery reset, etc. to no avail. These days. it wouldn't even stay on long enough to access recovery mode, before turning off.
Yesterday, I installed Nougat 7.0 ROM from XAR on it and tried to start it. same problem. It says updating applications xx out of 26, and then turn off. When I try to access recovery, I got the android logo and when it gets to "Erasing", it would turn off. Then now that the warranty has expired, I installed TWRP (twrp_3.1.0-1_sm-t710_13317.tar) and this time I somehow goto to TWRP recovery mode, I just left it on there to see how long it would last, instead of immediately erasing the caches and restarting.
After that once, I couldn't get it to stay on long enough to access recovery. So I tried to go back to OEM ROM using Smart Switch, but to no avail once again. The Download mode still says Custom even after Smart Switch emergency recovery
I have tried flashing various other things (5.1.1 Samsung ROM, 6.0 ROM from UK with AP, BL and CSC files, TWRP 5.1.1 permissive ROM, TWRP), in various jumbled orde,r out of frustration. Nothing worked. here's a list of ROMs I've tried:
T710XXU2DQCL_T710UVS2DQC1_EON
SM-T710_1_20170406180713_vd28gnex7t_fac
SM-T710_1_20170330211239_qkurg70e9y
5.1.1_T710XXU1BOH7_T710XAR1BOH7_XAR
twrp_2.8.7.1_LL_5.1.1_t710
twrp_3.1.0-1_sm-t710_13317
t710_5.1.1_boot
Right now, the only thing I can access is Download mode and it says Current Binary: Custom, System Status: Custom, AP SWREV B:2 K:0 S:0 and worse than before, the tab turns off at the Powered by Android logo and when I plug it in, it doesn't charge but I get this boot loop (with the just the powered by android screen flashing)
would it help to re-partition and nand erase all and install a fresh ROM with a PIT file, if so can someone please share me their PIT file for this model??
I am out of ideas, and ready to break this expensive brick
appreciate any help,
thanks
V
vvsarana said:
Dear all,
I have a Samsung Galaxy Tab S2 8.0 WIFI purchased last year (exactly to the day) in Cali. I believe it came with 5.1.1 XAR version.
A month later, my troubles began. I flashed with 6.0 Samsung WIFI ROM from some other country and the tab soon started to randomly turn off while being used. I am not sure if this is coincidental or not. When restarted, it would sometime fully boot, only to turn off while doing any mundane task surfing etc. and at other times, start and turn off as soon as the SAMSUNG logo comes. Weirdly, when I wait a day or two, it would start fully and work for a few minutes to half an hour
When I put it to charge, only rarely does the green battery logo came up, but most frequently I got a flashing thunderbolt sign.
I sent it to Samsung and it came back apparently with the correct firmware installed and the repair note said, faulty data cable replaced. But in a week of usage, the same problems started. I don't live in the US currently and so I don't have local warranty and don't have any means to send it back to Samsung USA. I've tried all remedies I could find, charging it to 100%, holding volume down and power for 15-30 seconds to simulate a battery reset, etc. to no avail. These days. it wouldn't even stay on long enough to access recovery mode, before turning off.
Yesterday, I installed Nougat 7.0 ROM from XAR on it and tried to start it. same problem. It says updating applications xx out of 26, and then turn off. When I try to access recovery, I got the android logo and when it gets to "Erasing", it would turn off. Then now that the warranty has expired, I installed TWRP (twrp_3.1.0-1_sm-t710_13317.tar) and this time I somehow goto to TWRP recovery mode, I just left it on there to see how long it would last, instead of immediately erasing the caches and restarting.
After that once, I couldn't get it to stay on long enough to access recovery. So I tried to go back to OEM ROM using Smart Switch, but to no avail once again. The Download mode still says Custom even after Smart Switch emergency recovery
I have tried flashing various other things (5.1.1 Samsung ROM, 6.0 ROM from UK with AP, BL and CSC files, TWRP 5.1.1 permissive ROM, TWRP), in various jumbled orde,r out of frustration. Nothing worked. here's a list of ROMs I've tried:
T710XXU2DQCL_T710UVS2DQC1_EON
SM-T710_1_20170406180713_vd28gnex7t_fac
SM-T710_1_20170330211239_qkurg70e9y
5.1.1_T710XXU1BOH7_T710XAR1BOH7_XAR
twrp_2.8.7.1_LL_5.1.1_t710
twrp_3.1.0-1_sm-t710_13317
t710_5.1.1_boot
Right now, the only thing I can access is Download mode and it says Current Binary: Custom, System Status: Custom, AP SWREV B:2 K:0 S:0 and worse than before, the tab turns off at the Powered by Android logo and when I plug it in, it doesn't charge but I get this boot loop (with the just the powered by android screen flashing)
would it help to re-partition and nand erase all and install a fresh ROM with a PIT file, if so can someone please share me their PIT file for this model??
I am out of ideas, and ready to break this expensive brick
appreciate any help,
thanks
V
Click to expand...
Click to collapse
Well i hve the same problem like you.. idk wht should i do with this condition.. bootloop.. always restart until logo.. :crying:
Please anyone help to solve our problem..
Your issue seems related to power. It seems your device doesn't charge correctly and is turning off due to running out of battery.
What does TWRP report as the charge state?
Do you get the same issue when the device is plugged in to the mains?
ashyx said:
Your issue seems related to power. It seems your device doesn't charge correctly and is turning off due to running out of battery.
What does TWRP report as the charge state?
Do you get the same issue when the device is plugged in to the mains?
Click to expand...
Click to collapse
hi ashyx, I am pretty sure that battery isn't the issue here. even though the grey battery logo with a thunderbolt flashes while turned off and plugged in for charging, after a while it does charge anyhow. I can get it to 100%. Plugging in makes no difference.
I am thinking it could be a power button problem or a faulty usb port perhaps, if it is indeed a hardware fault?
vvsarana said:
hi ashyx, I am pretty sure that battery isn't the issue here. even though the grey battery logo with a thunderbolt flashes while turned off and plugged in for charging, after a while it does charge anyhow. I can get it to 100%. Plugging in makes no difference.
I am thinking it could be a power button problem or a faulty usb port perhaps, if it is indeed a hardware fault?
Click to expand...
Click to collapse
Did you ever resolved this issue? Curious if you have a solution.

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