[Q] Unusual bootloop - Galaxy S III General

Hi all, i installed the CM11 on my gf's Galaxy s3 (i9300 international version), the problem is that sometimes it randomly reboots and get stuck in an unusual bootloop. It reaches the bootsplash logo and it keeps rebooting, the only solution to get it back to work is to remove the battery for at least 30 seconds and try to turn it on, sometimes it works.
When the bootloop happens i'm not able to enter the recovery mode, because it just turns on and it keeps rebooting, same thing with download mode.
So, i'm new here, but i read about a common issue which is the sudden death syndrome and half-sds, it might be that? I checked and it has the insane chip.
Any advice/idea? It would be better to flash a stock ROM to be safe?

I would backup the whole device, recover initial firmware using kies emergency recovery mode and then start over again.
Had a similar problem but even worse: same bootloop, but no dice on recovery :\
Was unable to reflash or restore old firmware using Odin, Kies was the only thing that worked for me.

Nemed said:
Hi all, i installed the CM11 on my gf's Galaxy s3 (i9300 international version), the problem is that sometimes it randomly reboots and get stuck in an unusual bootloop. It reaches the bootsplash logo and it keeps rebooting, the only solution to get it back to work is to remove the battery for at least 30 seconds and try to turn it on, sometimes it works.
When the bootloop happens i'm not able to enter the recovery mode, because it just turns on and it keeps rebooting, same thing with download mode.
So, i'm new here, but i read about a common issue which is the sudden death syndrome and half-sds, it might be that? I checked and it has the insane chip.
Any advice/idea? It would be better to flash a stock ROM to be safe?
Click to expand...
Click to collapse
Do the reboots occure few seconds after pressing the power button?
I have exactly the same problem and I figured out that my power button is kinda stuck and thus permanently pressed.
This causes the permanent reboot, because holding the power button for a certain amount of time causes a reboot.
Try to push "Vol down"+"Homebutton" instantly after a reboot. If your galaxy enters the download mode (before rebooting again), you have the proof, that it's the fault of the power button due to the fact that pressing the power button would have been necessary.
I hope the fix will be for free under warranty.
At the first moment I also thought it would be the Sudden Death syndrom, but thankfully it's not the case and only the power button has to be fixed.

Togholl said:
Do the reboots occure few seconds after pressing the power button?
Click to expand...
Click to collapse
I don't know, i didn't paid attention to it. Anyway thanks to both of you for the replies, i'll check the power button as soon as possible since i don't have the phone with me right now. If that's not the cause, i think i'll do an emergency recover with kies as suggested by Cy4n1d3.
Now i still have a doubt, CM11 should have the fix for the sudden death syndrome merged into its code right? I'm asking this because if i'm right i could exclude sds as the cause of the problem...

Rebooting is not an SDS symptom, SDS is totally dead -suddenly.
Power button failure is diagnosed by inserting the battery, if it turns on by itself then button contacts are shorted out.
Your problem sounds more like corruption of the cache or dalvik, wipe and reflash your rom or go back to stock to test. Check MD5 of downloads and don't restore anything before you test.

Related

[Q] Help - Please

I'm not a noob and have tried everything I can think of - hooking my phone up to my pc via odin and adb with zero results. Tried plugging on my phone overnight, etc etc.
My problem - I was at work and took a photo with the camera app, the camera crashed, then I opened the gallery. I went to reboot my phone and nothing happens. Now when I try to power on the phone, nothing happens. I do a battery pull and then put the battery back in and it boots up for no more than 3 seconds to the Samsung logo and then turns off. If I try booting into recovery, same thing - just turns off and the same situation if I try to boot into download mode. Has anyone encountered this problem? Note that I am running a custom recovery - Philz CWM. I fear the worst; my phone is perma bricked.
edit; FIXED - Faulty power button. Power button will stay in and not pop out without prying at it.

Phone keeps restarting at recovery screen

Hi guys,
I have an issue with my phone:
Yesterday, tried to restore factory settings, since the phone was quite slow.
A second or so after I confirmed the reset, the phone turned off and wouldn't start.
I took out the battery and it was swollen.
I bought a new battery today, inserted and stated the phone.
What happens now, is that the phone boots, Samsung logo appears, then the TWRP logo appears, from this point, the phone stuck at this logo screen,
and flashes every few seconds (I can't post a video here, so I can share the link in private, if anyone can take a look).
I tried to leave the phone for about 20mins without battery at all, removed SD cards, removed SIM cards, no use.
Trying to boot to recovery or download mode gives the same result.
Tried today with an original battery of a friend's Galaxy S4 , same result.
Does anyone have an idea what I can do?
Thanks in advance for you help
webking said:
Hi guys,
I have an issue with my phone:
Yesterday, tried to restore factory settings, since the phone was quite slow.
A second or so after I confirmed the reset, the phone turned off and wouldn't start.
I took out the battery and it was swollen.
I bought a new battery today, inserted and stated the phone.
What happens now, is that the phone boots, Samsung logo appears, then the TWRP logo appears, from this point, the phone stuck at this logo screen,
and flashes every few seconds (I can't post a video here, so I can share the link in private, if anyone can take a look).
I tried to leave the phone for about 20mins without battery at all, removed SD cards, removed SIM cards, no use.
Trying to boot to recovery or download mode gives the same result.
Tried today with an original battery of a friend's Galaxy S4 , same result.
Does anyone have an idea what I can do?
Thanks in advance for you help
Click to expand...
Click to collapse
Sound to me your power button is stuck/faulty. Does it reboot also when in download mode? If so, then it's your power button. Wiggle it loose or replace it.
Lennyz1988 said:
Sound to me your power button is stuck/faulty. Does it reboot also when in download mode? If so, then it's your power button. Wiggle it loose or replace it.
Click to expand...
Click to collapse
It never gets to download (or recovery) mode...
It keeps flashing at the logo of the TWRP
Trying to boot to download or recovery modes, gives the same results
I don't think it's the power button. Otherwise it would turn off if it is stuck or not turn on at all if it's faulty.
Still, I wouldn't exclude it.
The screen flashing might related to a GPU problem. I don't think it is a problem you can fix yourself.

Samsung s4 bootloop even after a stock Odin flash

Hi, im having an issue with my Galaxy S4 I9505.
I was having random reboot issues where the phone would boot up and then turn back off.I decided to try flashing the stock ROM via Odin. I tried flashing the stock ROM many times, still no luck . So i then tried flashing a custom Touchwiz ROM (THOR) via TWRP and it worked . It booted up normally and came up to the setup screen. After about 5 minutes of using it, the screen went off and carried on rebooting. I've tried many different ROMs and now the phone won't boot up at all (bootloop) .
Please reply as i've been trying to fix this problem for about 3 days now.
Your help will greatly be appreciated.
By bootloop you mean it constantly reboots or it gets stuck at the boot animation?
If it constantly reboots, it may be a problem with the power button circuit of the button itself.
Pwnycorn said:
By bootloop you mean it constantly reboots or it gets stuck at the boot animation?
If it constantly reboots, it may be a problem with the power button circuit of the button itself.
Click to expand...
Click to collapse
it constantly reboots and sometimes gets stuck.
Pwnycorn said:
By bootloop you mean it constantly reboots or it gets stuck at the boot animation?
If it constantly reboots, it may be a problem with the power button circuit of the button itself.
Click to expand...
Click to collapse
What do you think I should try doing?
FazXD said:
What do you think I should try doing?
Click to expand...
Click to collapse
Well, I'd say it's definitely a hardware issue. Could be your power button, which is an easy fix. But anything else might require a whole motherboard replacement.
Yes i was thinking of buying a new mootherboard

S7 Edge crashes and reboots at Samsung logo, hardware or not? [All Stock]

Im so lost with this, im all stock but one day my phone just freezes then bootloop, I would be able to get it work by just leaving it and let it drain itself since it will be boot looping and lock me out completely, like the power button + low volume button would not work even after 10 minutes of holding it, would not boot to download or recovery mode, just the soft touch keys light on and the blue LED.
I reflashed my ROM from sammobile yesterday but did it half-effort, just dirty flashed it but it seemed to reformatted my phone anyway, after reflashing it, everything seemed to work properly for 20 hours and then now im back to this piece of ********* boot looping...
S7 Edge
running the Australia unbranded XSA-G935FXXS1DQG4 from the branded G935FXXS1DQG5,
would flashing de-branded affect this? or this is hardware?, one thing I did that I think was a mistake is that I chose to restore from old device, can apps cause this?
the very first time this happened, I plugged it in to charge then crash and bootloop.
UPDATE:
Things I've tried,
-Booting with NO sim card and SD Card
-Wiping cache and partition then reflashing stock XSA and OPS firmwares
im convinced that this is a hardware issue and will go to Samsung.
mine does this too. crashes then gets into a bootloop at the Samsung logo. I usually try holding the lock and volume down button. I factory reset the phone once but it still keeps happening, this started happening around 4 weeks ago
Guys your Main/Mother-boards are broken.. u need to replace it, or send back to Samsung..
Damn! Crash reboot samsung logo
Damn you say broken mother board...
did this. Press vol down, power button and home key...hmmm... i think...pressed so many combos hard to tell themapart

Samsung galaxy s3 neo death loop

Hello, people I have problem. I have samsung galaxy s3 neo, and phone are restarting and restarting when I put the battery in phone. Just load samsung logo 2 seconds and reload, and this going and going. I can't reach recovery mode and download mode, because it's restarting. I searched on internet how to solved it and I found theres can be button problem, but I assembled phone and cleaned with alcohol button and around button, but it don't help it. After that I scewed that button (on motherboard) but it also don't help. Samsung galaxy s3 neo restarting and restarting I don't know what to do.... Remember I can't reach recovery and download mode, I try clean button and also I scewed it, also try to take battery off wait few minutes and back it again, but also don't solve it. Please help ! :crying:
Sorry for my poor English
are you managed to solve it.
I have same problem any help.
alaa92 said:
are you managed to solve it.
I have same problem any help.
Click to expand...
Click to collapse
this morning a friend of mine gave me his s3 neo with the same problem, bootloop, and no recovery, and no download mode, I put my battery, and I pressed for 10 minutes, continuously the power button, and in the end it was switched on normally, I went into recovery, wipe and I installed the firmware, after a custom rom, and the phone is fine, but if I put back the battery of my friend, restart the bootloop, it is the battery not the power button!

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