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[Q] Phone shut off now stuck in permanent death loop

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TeflonTeffy
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Unhappy [Q] Phone shut off now stuck in permanent death loop

Hey all, I have a S3 i747 on rogers. I have had it for a couple years everything working fine and great, I rooted it after I bought it and it worked no problem. A week or two ago it suddenly shut itself off while I was using it. I didn't think much of it, then later that day again it turned itself off.

This time, it automatically tries to reboot but as soon as the logo appears it instantly turns itself back off again. It's not that it gets to a certain point, it's like there's a time limit on how far it can progress through the boot sequence, I estimate about 4-5 seconds. No matter what I try I cannot get it past this cut off time.

I have tried download mode, recovery mode, battery tricks (found on obscure sites), etc etc etc and still its stuck in this death loop. Im fine with buying a new phone, but I had not made a contact back-up for 6 months (no, I wasn't syncing with google) and have lost many, many new contacts as well as certain files and pictures that I wouldn't mind getting back.

Also, if I am very fast I can get the first page of recovery mode to pop up, but then the "time limit" hits and before any selections on the menu can be made it automatically reboots. If I leave the battery in, it will try every few minutes to boot repeatedly until the battery is completely zapped.
 
Florad77
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Quote:
Originally Posted by TeflonTeffy View Post
Hey all, I have a S3 i747 on rogers. I have had it for a couple years everything working fine and great, I rooted it after I bought it and it worked no problem. A week or two ago it suddenly shut itself off while I was using it. I didn't think much of it, then later that day again it turned itself off.

This time, it automatically tries to reboot but as soon as the logo appears it instantly turns itself back off again. It's not that it gets to a certain point, it's like there's a time limit on how far it can progress through the boot sequence, I estimate about 4-5 seconds. No matter what I try I cannot get it past this cut off time.

I have tried download mode, recovery mode, battery tricks (found on obscure sites), etc etc etc and still its stuck in this death loop. Im fine with buying a new phone, but I had not made a contact back-up for 6 months (no, I wasn't syncing with google) and have lost many, many new contacts as well as certain files and pictures that I wouldn't mind getting back.

Also, if I am very fast I can get the first page of recovery mode to pop up, but then the "time limit" hits and before any selections on the menu can be made it automatically reboots. If I leave the battery in, it will try every few minutes to boot repeatedly until the battery is completely zapped.
Does it still keep rebooting even in download mode? If not then try reflashing your stock rom.
Or maybe try booting up without an sd and without a sim card.

Sent from my SGH-I747M using Tapatalk
 
zoomonkey90
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Also make sure to not hold the volume and home keys too long when going into download mode, once the phone vibrates you should be able to let go. I made the same mistake on my phone and then noticed i had been pressing the volume and power keys while download mode was starting, causing it to select cancel. If not though you are probably looking at some sort of internal hardware issue that may be causing the reset to trip or causing the phone to believe it should be shutting itself off at that moment. This is all purely speculation, but hope it helps.

Sent from my SAMSUNG-SGH-I747 using xda app-developers app
 
TeflonTeffy
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Originally Posted by Florad77 View Post
Does it still keep rebooting even in download mode? If not then try reflashing your stock rom.
Or maybe try booting up without an sd and without a sim card.

Sent from my SGH-I747M using Tapatalk
Quote:
Originally Posted by zoomonkey90 View Post
Also make sure to not hold the volume and home keys too long when going into download mode, once the phone vibrates you should be able to let go. I made the same mistake on my phone and then noticed i had been pressing the volume and power keys while download mode was starting, causing it to select cancel. If not though you are probably looking at some sort of internal hardware issue that may be causing the reset to trip or causing the phone to believe it should be shutting itself off at that moment. This is all purely speculation, but hope it helps.

Sent from my SAMSUNG-SGH-I747 using xda app-developers app

I can't even make it into download mode, or recovery mode. Like I said, its as if the phone has a built in time-limit for how long it is going to load, the absolute farthest I can get is the first page of recovery mode and then boom it instantly resets before I can even make one selection, and I did this like 100 times in a row so I got very fast at getting into recovery mode. As per 2nd quote, yes I am releasing the buttons as I am supposed to to get into the appropriate mode, but the "time limit" hits and just reboots no matter what.

I've tried booting up without sim and sd card, but it still doesn't make it any further.
 
jefferyjunk
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Default Dead boot look i747

Fix a fix for it? I have the same problem.






Quote:
Originally Posted by TeflonTeffy View Post
I can't even make it into download mode, or recovery mode. Like I said, its as if the phone has a built in time-limit for how long it is going to load, the absolute farthest I can get is the first page of recovery mode and then boom it instantly resets before I can even make one selection, and I did this like 100 times in a row so I got very fast at getting into recovery mode. As per 2nd quote, yes I am releasing the buttons as I am supposed to to get into the appropriate mode, but the "time limit" hits and just reboots no matter what.

I've tried booting up without sim and sd card, but it still doesn't make it any further.
 
theramsey3
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I would put my money on a bad power switch/button.

Sent from my SAMSUNG-SGH-I747 using xda app-developers app
 
pc103
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Yes, it acts like a stuck power button, a common problem with galaxy s phones.

If it auto starts when you insert the battery, that's a sure sign the power on circuit is active.

When my Captivate did this, I opened the back & carefully tapped it on a table edge to try dislodging any debris.

I then followed teardown instructions, inspected the switch assembly & blew it out with forced air.

The problem ended & never returned. I honestly don't think there was a physical defect in my phone's switch; more likely a residual charge on the mainboard.

Root causes vary as do solutions for the problem. Inexpensive switch replacement is a good one too.

Since then I have used a couple of apps to reduce the need for the gs3 power button.

Sent from my SAMSUNG-SGH-I747 using xda app-developers app

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