Constant reboots - Galaxy S5 Mini Q&A, Help & Troubleshooting

I've been facing a weird problem with my G800H since yesterday. The phone will reboot constantly. It will boot into android, I will even be able to open apps, but it will suddenly reboot after a minute or so. I didn't do anything to my phone for it to start doing this. The weirdest part is that the rebooting will happen even if I am in recovery mode (TWRP). Also, the phone will automatically turn on if I take off the battery and put it back in, something that never happened before.
I use stock 6.0.1 (rooted) and TWRP 3.0.
Things I've already tried:
Charging it;
Safe mode (same problem);
Taking off SD card (who knows);
Wipe cache/dalvik (phone restarts before finishing);
Re-install ROM ( Download mode (ODIN) doesn't open, insta-restart after 'press volume up to enter odin').
I really dont want to do a full factory reset, only as a last resort, as i don't even know if it will have time to do so, or even if it will fix it. Does anyone know a way for wiping the cache without having to format it ( takes too long in TWRP so phone restarts before finishing ), or maybe have some other way of entering download mode, maybe with adb, or finding out what went wrong. Any sugestions on what to do or what happened?

I (my wife) have the exact same problem, I bought a new battery which didn't solve the problem.
Also tried a factory reset, didn't help either.
It is a non rooted phone...
Next try is a custom rom, hope it helps...

Install an app that records logs like Logcat, set it in record mode and wait until the phone reboots. Then look through the file, study what happens near the end when the phone turns off. You'll most likely find the cause there.

Related

Stuck at Galaxy S logo & do NOT want to lose data

Today I found my Bell Vibrant (GT-i9000M) with a blank screen and lit up buttons. I had not done anything other than root and lag fix a few weeks ago. Holding the power button brought up the menu to power off but it locked up when I selected power off. I had to pull the battery. Now every time it starts up it sits at the Galaxy S screen for a long time then goes to a blank screen and nothing happens except the buttons light up when I touch it.
I want to know if there is a way to get my data off the internal SD. I have some pictures on there that I do not want to lose. I fear my only option is to wipe the device and factory reset it.
Some help and advice would be greatly appreciated. I have spent the last three hours searching for a solution but I haven't found anything that might work without wiping my data.
Thanks
the data must go if you want to get your phone back
there is no way to repair the phone without losing data
Well the factory reset worked. At least it booted up anyway. I wonder what happened to my phone. It was fine and then I left it on my desk for maybe 20 minutes and all the sudden it is broken. :/
I have the same issue. How do i factory reset from here?
#1RAGE said:
Well the factory reset worked. At least it booted up anyway. I wonder what happened to my phone. It was fine and then I left it on my desk for maybe 20 minutes and all the sudden it is broken. :/
Click to expand...
Click to collapse
How did you factoyr format it?
Get into recovery mode and do it
Sent from my GT-I9000
Reflashing / Resetting Factory Defaults etc. do NOT touch your Internal SD.
Guys i got the same prob,did factory reset and the problem still remains...what can i do???Black screen,some vibraton,and the buttons lit,but nothing else.Any advices plz??
You all may be suffering from a corrupted /system partition because of the lagfix applied. Read up on http://forum.xda-developers.com/showthread.php?p=9365294#post9365294 to see if that applies.
These are too complicated for me....i tried to do the lagfix,but it had loopback error,so i guessed it didnt do it.I rebooted my phone just to clear the memmory and play a game or something,and never got on again...just stays there vibrating.So i did factory reset and still nothiing.
I have similar problem. i9000 samsung screen appears, then goes blank, and appears again continuous cycle until battery is removed. Animated logo doesn't even start. I cannot seem to enter recovery mode. I can enter download mode (dwn vol, home, and power) and I tried to USB to my computer in download mode to try and pull the pictures off with ADB, but ADB doesn't seem to see the device connected in download mode. Is Odin my next option? Or does that only work with unlocked phones. I was on stock 2.2 that Kies updated for me.
Pleeeeaaase help. My children opening christmas gifts are on the phone and once i get the videos I can just send it off to Bell for full replacement. They have told me that once it gets sent out for repair my pictures will be gone.
boot-loop after flashing CM10 for galaxy s plus
the screen says cwm-based recovery v5.5.0.4
-reboot system now
-install zip from sdcard
-wipe data/factory reset
-wipe cache partition
-backup and restore
-mounts and storage
-advanced
after install gaspp and CM10 and thenreboot system now.... Im stuck here .... please help!!!!!

[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:

boot loop & battery drain

HI. HAVE NOT FOUND THIS FULLY ADDRESSED. HAVE THIS USED S4 ACTIVE . ONLY BEEN ABLE TO USE IT FOR 4 DAYS.-STOCK 4.4.2 UNROOTED .YESTERDAY IT DRAINED THE BATTERY TOTALLY WHILE CHARGING. GOT A NEW BATTERY AND IT STARTS OVERHEATING SO MUCH IT BECOMES HARD TO HOLD. THEN I WIPED CACHE AND DID A FACTORY RESET AND IT GETS STUCK AT BOOT WHEN I AM ABLE TO TURN IT ON , WHICH IS RARELY, IT NEVER GETS PAST THE BLUE ATT BALL.ALL IT SHOWS IT THE GREY BATTERY. mY PC WILL NOT RECOGNIZE IT, ODIN WILL NOT EITHEIR OBVIOUSLY. ANY KIND SUGGESTIONS??? WOULD LIKE TO THANKS FOR THE HELP
1. writing everything in capslock will not help you to get a reply faster my friend.
2. seems you bought a device with a dirty flash. someone flashed a custom rom like cyanogen, faced these issues, tought he can go back with a easy reflash, but didnt cleared the device by factory reset.
What i would do:
trying to get into recovery mode by holding volume up + power. if there is a recovery system on this device, wipe factory reset the device and flash a new fresh OS onto it.
otherwise you can use it as a paperweight.

Note 5 freezes, reboots without any apparent reason

Since a few days now, my Note 5 N920C just randomly freezes, hangs and reboots. Sometimes the screen goes black and then it reboots sometimes the screen is just the last thing i was using and then it reboots. It even happens when im in recovery trying to flash a zip or when the phone is switched off and charging.
I have tried:
1) Wiping Cache
2) Wiping all data / Factory reset
3) Safe mode (Still reboots)
4) Uninstalling all apps
5) Flashing stock firmware from Samsung Smart Switch
6) Rooting and flashing a new kernel (SkyHigh)
After all of this i still have the same problem. Is there something else i can do? Phone is not in warranty so i really want to make sure there is nothing else i can do to fix or understand the problem before spending money on repairs.
Thanks in advance
Have you checked that there is no power-related issues with the device?

galaxy note 4 (sm-n910t) caught in boot loop and won't enter to recovery.pls help

my galaxy note 4 (sm-n910t) caught in bootloop . i dont know what caused it. the phone simply restarts upto first bootscreen, ie upto 'samsung galaxy note 4' and then vibrates and then restarts.this process continues upto battery is down or i pull out battery.the phone is not entering to recovery mode but enters to download mode.
i have tried installing stock rom from sammobiles but it won't help.i have also installed custom recovery twrp but that also won't help to enter to recovery mode,
i am trapped pls help..
You didn't mention how you tried to install the stock ROM . Did you use Odin?
I just fixed mine with the same issue. I was able to boot into recovery and download mode but mostly download mode without bootloop when I had the usb cable plugged in. I used ADB when I could to boot into download mode, but the buttons worked too. Trying to restart the phone only lopped after the Google screen.
I followed several guides here to flash stock with Odin and wipe cache etc but none solved my boot loop issue. almost gave up but there is a video on You Tube that said the battery warping in the cause of the boot loop. The battery, after/during quick charge, may heat up and change shape causing the issue. Today I installed my new battery purchased on amazon and no more issues.
Now I am on stock and have to find a good rom.
If you do decide to flash back to stock there are a lot of good guides. You may find yourself stuck on the T-mobile screen for 15 minutes when booting for the first time but that is ok. If you still boot loop after installing stock and wiping cache I would try the battery.
Nabeel mhd said:
my galaxy note 4 (sm-n910t) caught in bootloop . i dont know what caused it. the phone simply restarts upto first bootscreen, ie upto 'samsung galaxy note 4' and then vibrates and then restarts.this process continues upto battery is down or i pull out battery.the phone is not entering to recovery mode but enters to download mode.
i have tried installing stock rom from sammobiles but it won't help.i have also installed custom recovery twrp but that also won't help to enter to recovery mode,
i am trapped pls help..
Click to expand...
Click to collapse
hi OP,
did you find any solution to your problem?
Hello all. I'm also pasting this in the T-mobile thread in case it can be of benefit to someone. This is advice to use as a very last resort if you are experiencing the recovery bootloop issue AND you don't have the emmc failure bug. I had the recovery reboot, sudden shutdown with no warning, etc. issue for the past two weeks. I tried everything on Google and Youtube to fix my problem with no success. I flashed multiple stock ROMS and recovery tars (stock and TWRP) via ODIN, but nothing worked. Oddly enough, I never received the emmc error that I have read about. Also, in the few times that my phone booted normally, I even loaded the Wakelock Power Manager app, set it to partial wakelock and my phone STILL continued to bootloop. As a last resort, I bought a new battery, but the reboot problems continued in Android 4.4.4 Kitkat, 6.0 Marshmallow, 7.1 Nougat and 8.1 Oreo ROMS. Well, here is what finally helped me to get my phone back operational. I had a backup ROM from a previous install and a TWRP flashable version of the same ROM on my SD card (in case the phone did not stay on for the full restore). I put the phone into a ziplock bag into a freezer for about 20 min. (thankfully this time TWRP stayed on long enough for me to do the following):
1) copy all the files I wanted to save from internal storage to a computer.
2) performed a full wipe (Dalvic, Cache, System, etc. Like when flashing a ROM, but this time also internal storage. Note: Please do not wipe both internal and SD card, as you may have a difficult time trying to load the ROM file back on the sd card (assuming you don't have a card reader).
3) After wiping, I was able to restore my stock ROM backup (or you can just flash the stock ROM).
I can't be 100% sure, but I think my wiping internal and then flashing the stock ROM finally did the trick. Since this morning, the phone has been pretty much back to as it was before. In either case, I'm sharing this with the hope that it helps someone else.
Sent from my SM-N910T using Tapatalk
chrismcnally123 said:
I just fixed mine with the same issue. I was able to boot into recovery and download mode but mostly download mode without bootloop when I had the usb cable plugged in. I used ADB when I could to boot into download mode, but the buttons worked too. Trying to restart the phone only lopped after the Google screen.
I followed several guides here to flash stock with Odin and wipe cache etc but none solved my boot loop issue. almost gave up but there is a video on You Tube that said the battery warping in the cause of the boot loop. The battery, after/during quick charge, may heat up and change shape causing the issue. Today I installed my new battery purchased on amazon and no more issues.
Now I am on stock and have to find a good rom.
If you do decide to flash back to stock there are a lot of good guides. You may find yourself stuck on the T-mobile screen for 15 minutes when booting for the first time but that is ok. If you still boot loop after installing stock and wiping cache I would try the battery.
Click to expand...
Click to collapse
Thanks sir! I have the same issue! it's working now after replace the battery

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