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[Q] Power Button/ Auto-Turn on Battery

I own a Samsung Captivate and I was running CM7. Randomly my Power Button wouldn't unlock or lock the phone. I flashed to stock and still no avail. Also my phone turns on as soon as I insert the battery. Please help

Power button could be bad. If still under warranty, get att our Samsung to replace it.

I'm not under warranty though :/

This just happened to mine while doing the same thing. I took my power button plastic piece out, and messed around with the actual button, and it fixed it, but that's just for me.

I am having the same problem right now as well. I used this to remap a power button to my volume down key, but still cant get my power button to do anything.
http://forum.xda-developers.com/showthread.php?t=850464
If I feel bold I might try opening it up and fiddlying with the hardware button as welll...

[Q] Help! Flashed bad kernel + broken power button

So as the title suggests, I flashed a bad kernel and I can't go into recovery because my power button is broken. First, about the power button. It seems to be stuck on "on" so when I pull the battery and put it back, the phone turns on. I can go to the bootloader by only holding volume up but when I get there, buttons won't work, even volume. This is probably because of the power button being held "on". Also, I have opened my phone up and there seems to be no dirt lodged in the button. Next, the kernel. I flashed a kernel that I was sure was compatible. After the Google screen, all I get is an endless black screen. Now, I think it boots to OS because after I wait awhile and tap on the area of Jelly Beans unlock, the phone vibrates. No screen though. Help, please! Thank you!
ROM was Strawberry and flashed kernel was Thalamus 4.1.2 if it helps.

During the loop, does the device is recognized by windows? Can you ADB it? If yes, you are saved, man... I had a similar problem, but unfortunately I'm unlucky now: http://forum.xda-developers.com/showpost.php?p=37111798&postcount=49

[Q] Power Button Issue

Recently, I've been having trouble with my phones power button, as in it doesn't work. I can click it all I want and it won't do anything. However, if I ever take the battery out or if the battery dies and I put the phone on the charger it automatically boots up as if I had hit the power button. This really isn't a big deal except I would like to change the rom on it and am not sure how to do so anymore without a functioning power button. You guys have any advice on what the problem might be or how to change the rom without a functional power button?

alnwpi said:
Recently, I've been having trouble with my phones power button, as in it doesn't work. I can click it all I want and it won't do anything. However, if I ever take the battery out or if the battery dies and I put the phone on the charger it automatically boots up as if I had hit the power button. This really isn't a big deal except I would like to change the rom on it and am not sure how to do so anymore without a functioning power button. You guys have any advice on what the problem might be or how to change the rom without a functional power button?
Click to expand...
Click to collapse
Download an app called flashify from the market, open the app, select zip file, pick to flash either with TWRP or CWM (depended what you have installed as recovery), then hit yes to reboot.

You could install xposed module and reassign the power button to another physical hardware button and then replace that button with something like LMT launcher. Sounds convoluted but my power button stopped working and now my home button is my power button and I have LMT taking care of the home functionality. But that won't work in recovery sorry.
Sent from my ST18i

I had to rip my power button off from the motherboard. If I ever find a button worthy of soldering on I'll send you a link to it. Although I will probably wait until I get a new phone.

I tried using Flashify to flash a 4.4 ROM. Unfortunately, now the phone won't boot. It will get to the black screen that says Samsung SIII, stay there for a little bit and then shut off at which point it tries to turn on again since the power button must be stuck. Any ideas as to how I could fix it from my computer?

alnwpi said:
Recently, I've been having trouble with my phones power button, as in it doesn't work. I can click it all I want and it won't do anything. However, if I ever take the battery out or if the battery dies and I put the phone on the charger it automatically boots up as if I had hit the power button. This really isn't a big deal except I would like to change the rom on it and am not sure how to do so anymore without a functioning power button. You guys have any advice on what the problem might be or how to change the rom without a functional power button?
Click to expand...
Click to collapse
Unfortunately, not to my current knowledge. Power button fix's can be troublesome if you don't know how to put it on the motherboard properly.
Personally, I've repaired hundreds of power buttons on an S3.

Just wanted to give you guys an update. I was able to get my phone into boot mode and realized I could swipe right to make selections. I installed a couple old roms i had on the memory card but it would never get past the turn on animation. I finally just downloaded the adb sdk and used it to download a rom onto my phone using adb sideload through the terminal on my mac. I think that's what I did, basically just followed instructions on a screen. Anyways, updated to 4.4 so I'm happy.

[Q] [Q} Broken Power Button, Phone won't go into Recovery or Download Mode

The power button on my phone recently has stopped working. I need to get it warrantied, but I am running CM 10.2. I need to Odin back to stock, but I can not get into Download Mode or the recovery. When I go into Download mode, the initial screen pops up, the one where you choose to hit up to continue, or down to reboot normally. After I hit up, the screen goes black and nothing happens.
I really need to get back to stock, as Bestbuy are being dicks, and demanding I do a factory reset before they send my phone in.

Anything? I still need help on this.

Pompsy said:
Anything? I still need help on this.
Click to expand...
Click to collapse
This has been covered at least 10 times in the past few months we need a sticky. Take your battery out hold your phone so the power button is facing a table or floor and slam that side a few times it should work again (Temporary). You might need to hit it on the surface really hard 10-20 times before it works. Just not to hard or else you might crack the screen. I used a mouse pad to soften the impact. This trick no longer works for me so I ripped the button off. After about a month of doing this I needed to use things that would only hit the button to make it work. About a month after that nothing worked so I just took it off the motherboard and now boot from a off state by plugging into the wall and enter odin mode deny the prompt and it kicks me into a workable state.

ThePagel said:
This has been covered at least 10 times in the past few months we need a sticky. Take your battery out hold your phone so the power button is facing a table or floor and slam that side a few times it should work again (Temporary). You might need to hit it on the surface really hard 10-20 times before it works. Just not to hard or else you might crack the screen. I used a mouse pad to soften the impact. This trick no longer works for me so I ripped the button off. After about a month of doing this I needed to use things that would only hit the button to make it work. About a month after that nothing worked so I just took it off the motherboard and now boot from a off state by plugging into the wall and enter odin mode deny the prompt and it kicks me into a workable state.
Click to expand...
Click to collapse
I can get into the system just fine. When I go into the recovery or download mode, it doesn't stay in that mode. I tried the banging thing, and it made my power button go from intermittently working, to not working at all.

keep doing it until it works. The button is sticking that is why it reboots/stopped working.

Pompsy said:
I can get into the system just fine. When I go into the recovery or download mode, it doesn't stay in that mode. I tried the banging thing, and it made my power button go from intermittently working, to not working at all.
Click to expand...
Click to collapse
It sounds like your power button is physically broken, and it is activating intermittently, which is stopping the phone from entering download mode. My only experience with this problem is my own phone but ultimately mine got so bad that I had to rip the button off the motherboard, as ThePagel did. Your symptoms sound the same as mine.
You can try this procedure to get into recovery, which works for me without a power button. You will probably have the same problem you are having now with the phone rebooting on its own before you actually get into recovery, because the power button is activating.
1. Take the battery out of the phone and unplug it from USB power.
2. Plug in USB power.
3. While holding down the volume-down button and the Home button, insert the battery (this is a little tricky).
4. The phone should start and warn you that you are entering Download mode. If you want to use Odin to return to stock, do that now.
5. If you want to get into Recovery instead, press Volume Down to reboot and then *immediately* push and hold Volume Up and Home simultaneously. The phone should reboot into recovery. Mine does.
If that doesn't work, and you can't get a new phone without returning it to stock, then prying the power button off the phone's motherboard may be your only solution.

Recover data from dead/faulty Nexus 5 (power button loop)

Hi
My Nexus 5 has entered into (what I believe to be) a hardware bootloop due to a faulty power button switch. I will look into getting it fixed locally but am currently wondering if there's a way to get the phone on (disabling the power button in some way?) in order that I can recover data from the built in storage.
I realise this is unlikely as it would involve some kind of invasive hardware trick.
On the basis that my phone may never turn back on, is there any way to extract data from the built in storage at all?

try smacking it into table below the power button. Seriously If it wont help, just pop off the back cover and using a knife or something "brake" the button, and insert the usb cable while holding volume down button,. then send "fastboot reboot" command. You are going to fix the button anyway, so breaking it wont matter

I had same problem. I took phone apart and soaked button side in pure alcohol. And then some tapping and pushing the button and it started to work.

The power button getting stuck has happened a few times to me. I literally just find a wood table and give a few stiff taps to the top corner of the phone (power button facing down). Always does the trick for me.

gauthier81 said:
The power button getting stuck has happened a few times to me. I literally just find a wood table and give a few stiff taps to the top corner of the phone (power button facing down). Always does the trick for me.
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Click to collapse
Thanks, but I've had no luck with this 'solution'. I have tried tactically hitting my device but no luck. Have also smacked it down out of anger and no luck either.
I think there are two distinct power button failures. One where the button still works but sticks and can be unstuck (I had this on my first Nexus 5 and it was replaced by Google out of warranty) and another where the power button module fails and becomes 'always on' needing replaced.