Hitting the power button on my phone makes it go crazy - T-Mobile Samsung Galaxy S II SGH-T989

Has anyone else experienced this? If I hit the power button on my phone, the screen goes crazy and it eventually goes off. It starts to turn back on but then during the boot animation it just cuts off again. If i boot into recovery, it cuts out there too. I was trying to wipe my phone but it wont stay on long enough. I'm running the new cm 10 stable.

Saw this in another thread and they came up with a faulty power button. Either it's getting stuck or the actual connection is effed. Does it stick a little when pressed as in is it not fully popping back up? Because if it's happening in recovery too than that seems to be the case I would think. Have you had your device for a while now or is it newer?

Yep, sounds like a sticking button. The phone is hard wired to reboot when the power button is held for a number of seconds, no matter what is going on (it's equal to a battery pull), so if the button is stuck, you're in a loop.
Sent from my beastly Galaxy S 2.

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[Q] NO WAY! This is not possible?

I was talking on the phone and BOOM it resets.
It started reloading and can't! WTF!? It just gets caught. The Samsung logo comes up and then the darkside boot animation (been running this rom for a few weeks). Then it blacks out and does these intermittent vibrations like it's trying to boot but just stays black.
When I take out the battery and put it back in, it attempts to load itself without me touching any buttons. After the boot animation it goes black and does a single vibration that pulses every other second.
I've changed the battery several times, plugged in, unplugged, everything I try can't stop this.
I attempted to get it into recovery. After I get it there, it resets within seconds and puts me back to the same place. There is no way to get into download mode as it goes into this weird loop as soon as I plug the phone into USB.
Ever heard of this? What do I do?
Your explanation sounds like a hardware issue. your power button is being pressed and held without you doing it.
1- is the phone in a case? take the case off.
2 - if no case, did you get the phone wet? somehow the power button connection is being activated.
3 - power button is stuck.
Possible solution - remove battery then press and release the power button several times.
Let me know if that solved the issue.
Sent from my SGH-T989 using xda premium

Tmobile SG S2 Software problem or power button

MY galaxy s2 has problems with powering off every now and then. it was really bad at one point where all it was doing is turning on and rebooting right after. i had a custom rom for months and never had problems until yesterday. i couldnt go on recovery mode because it would always restart every five seconds. Now it seems to less frequent because i realized that it always reboots when i touch the power button once. Sometimes when i push the power button to take it off sleep mode, the power options pops up (recovery, restart, power off etc) so thats when i thought the power button might be the problem
Any guesses on what could be the problem?? If its software problems or power button issue.
P.S. reset my phone, re rooted it, and put a new rom darkside. It literally stays on until i push the power button. then it restarts five seconds later.
the power buttons seems to stick....I have the same problem, the phone is acting as if the power button is being pressed without being let go. When the power button is held indefinitely it just keeps rebooting over and over again. It occurs sporadically, but once it sticks..it sticks. I seem to be able to unstick it by slapping it against my hand but eventually it turns off. Its definitely a hardware issue and I will open up the phone right now to investigate. Ill write if I find anything useful.
albert-557 said:
MY galaxy s2 has problems with powering off every now and then. it was really bad at one point where all it was doing is turning on and rebooting right after. i had a custom rom for months and never had problems until yesterday. i couldnt go on recovery mode because it would always restart every five seconds. Now it seems to less frequent because i realized that it always reboots when i touch the power button once. Sometimes when i push the power button to take it off sleep mode, the power options pops up (recovery, restart, power off etc) so thats when i thought the power button might be the problem
Any guesses on what could be the problem?? If its software problems or power button issue.
P.S. reset my phone, re rooted it, and put a new rom darkside. It literally stays on until i push the power button. then it restarts five seconds later.
Click to expand...
Click to collapse

phone bricked?

Hi all
wondering if someone might be able to give me hand
my phone is rooted and am running CM10 stable and was working fine for about 3 months.
this morning i went to use the calculator and then the phone rebooted, and will not come back up.
I keeps viberating every coupel fo seconds. Tried to hold down power button but nothing happens. yanked battery and and reboot and i see the samsung slapscreen then it goes back to viberating
I tried to yank the battery, while holding down the power volume up/down to get into recovery but no luck. tried to yank battery and hold down volumne up/ down trying to get into download mode but also no luck
wondering if there might something i can try to get my phone back working
take care
i tried to take the phone apart to see if the power button was stuck but still now luck
Sounds like a power button issue. Its not that it gets stuck physically, the power switch gets messed up and acts as if its being held down. You can replace the switch or try a ghetto fix. I had to remove the power button from the case from my brothers phone. I took it out then plugged the hole with it by taping it on from the outside.
There are a few ROMs out there that allow you to use alternate buttons to turn off the phone and use volume keys to wake it up. So you will only need the power button to turn on the phone when its off completely. For my brothers phone I use a toothpick since I removed the power button.
It is just beginning to mess up on my phone bit it wasn't a severe enough case for me to remove the power button.
I would recommend trying to fidget with the button a bit, trying to see if you can get it out of the power loop (endless vibrating). What I do is pull the battery and press the button a few times. I even flick that corner of the phone a few times. Then I put the batter back in and see if it stopped cycling. If not I try to press the button a few more times and or give it a flick or two with the battery in. There seems to be no direct method that works but it eventually stabalizes.
If it does stabalize, I'd recommend testing to see how sensitive it is. If you can't put it in your pocket or even the slightest movement makes it cycle. I'd say you need to remove the power button or have the power switch replaced. If it stabilizes I would just get a ROM with the options I mentioned and stop touching the power button.

[Q] Phone turning itself off and on again and again.

My phone is acting really strange. It turns itself off and then on again and again in this cycle as if the power button is always being pressed.
I can sometimes get into my recovery (CWM) but when I try to go deeper into the menu. I get kicked back to the main screen as if im pressing the power button to go "back" until the phone gets completely turned off again.
I noticed something too. When I pull out the battery and put it back on. The phone turns itself on without me even pressing the power button. Then the cycle continues again.
Very frustrating.
Could this be software, ROM, recovery, partition related or does this sound something hardware related?
EDIT:
I think this guy is having the same problem as me. Weird.
http://forum.xda-developers.com/showthread.php?t=2557537
Quick update in case someone bumps into the same problem.
I just got back from the repair shop. The power switch was indeed broken. The technician replaced it with a new one and the phone works fine one.

[Q] Please help! Random power off won't boot!

Okay I will try to sum this up. My S3 was working fine and everything randomly I noticed issues with battery calibration It would be 100% then I would calibrate it and then unplug and then I'd instantly drop to 85%. Thought It was a battery issue and made a point to get a new one later. Then it kept working for another month or so then It started really screwing up the shutdown menu would randomly pop up and I'd back out of it.
Then randomly 3 seconds later the phone reboots. And it would keep doing that randomly I thought it might be a power button issue. Then as time goes on it got really bad to where it would simply reboot and not make it past the bootloader, It would not "reboot" more like a complete shutdown then I'd have to power it again and have it do the same thing. Seeing how I could not even make it past the bootloader I got a new battery, waited a week for it and then I put it in and the same issue happened. It would not get past the bootloader.
So I kept trying and trying and trying and it finally booted past that. And it stayed on for a whole night. I did everything on it I normally would and it was working great. Then the battery was getting low so I plug it in and was going to calibrate it after it was charged, I go back to it and it's dead again won't get past the bootloader once again. I'm completely out of ideas on how to fix this I pop'd off the button and blew in there and the button seems fine and everything still no change. I also can not get into recovery. It trys and loads but then shuts off. Anyway if anyone has any ideas on what this is or how to fix please help! I need my phone back! Thank you.
I'm running MOAR Lite version.
UPDATE: Took the phone apart and took a close look at the button it looks 100% fine...I saw a video on youtube that requires you to complete tear the button off and it works. But I don't know if the button is my main cause of this issue or if it will actually work. Some says it works, some says it does nothing...Please let me know thanks...
UPDATE 2: It will show that battery with spinning circle in it for like 1 second then turn off again. (When it is plugged in)
That's odd. But when it comes to the power button, dismantling and what not 90% of the time will show 0 issues. It will look perfectly fine when it's not. You playing with the power button I assume were pressing hard and normally to try testing it. It's a common issues on this version of the S3 to have faulty power button and you would need to get it repaired. Odly even slightly atmospheric changes can cause it to act different at different points. Some days it works fine, other days a very slight brushing over can cause it to screw up and trigger a manual shut down (holding for like 10 or 15 seconds).
Assuming that it is the power button, or to try, just do a variation of things to the power button itself. Use your finger nail to jiggle it around with different pressures. During boot if it shuts off, it could be the power button internally stuck, just jiggle it around.
This is all I can think of unless you bring it in to get repaired.
I was encountering the exact same problem. I would try to get into download mode and it would sit at the "Downloading" screen for about 5-7 seconds then the display would go blank. It won't make it into recovery either. Based on the above recommendation I took the whole phone apart and sprayed a lot of compressed air directly on the power button mechanism and the plastic case pressing the button in. I didn't see anything broken with the button when I did that.
It seems to be working now, I can boot into my Rom. Don't know how long this fix will last.

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