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[Q] Unusual bootloop

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Nemed
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Default [Q] Unusual bootloop

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?
 
Cy4n1d3
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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.
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Togholl
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(Last edited by Togholl; 25th December 2013 at 01:01 PM.)
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Quote:
Originally Posted by Nemed View Post
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?
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.
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Nemed
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Quote:
Originally Posted by Togholl View Post
Do the reboots occure few seconds after pressing the power button?
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...
 
boomboomer
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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.
Note: This quote doesn't automatically apply to everyone, decide for yourself if it might apply to you.

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What has this place become?

It's essentially a few people graciously answering the same repeating of immature, lazy, demanding questions from the masses.

Nobody searches. Nobody reads the first posts or titles of threads. Nobody even looks at posts a couple above their own.

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