Develop Bugs

Galxy s2 Vibrating and crashes at loading bar.

So i've looked around and no one that i've seen has the same exact problem as i do. Here's my post in another forums about my problem.
Here's my story about my Galaxy s2 for T-mobile. My phone randomly turned off 2 days and whenever i tried to turn it on, it would restart and basically never get pass the blue loading bar screen. Second, i found out about this boot loop sequence and i was able to do a factory wipe.
After i factory wiped the data etc off the phone, i was able to use it until it ran out of battery, but then after i found out it ran out of battery, it wouldn't let me turn it back on, it wouldn't get pass the loading screen, once again. On the other hand, i am able to go to recovery mode or download mode, but the phone shuts off before i can even try and click on the options i want.
Today, i found out that if i kept pressing power button consecutively on the phone, I'd be able to go to my home screen and basically act as if nothing ever happened, it'd function as a new phone! I then had the nerves of turning off my phone just to make sure it finally works now, but my hopes were crushed and now the pressing the power trick does not even work anymore. It would probably work one out of 10-15 times, and in the end it'd still restart. I am using a gingerbread galaxy s2. My friend tried using the usb jib on my phone, and it worked but whenever he tried to plug in the usb, the phone would just restart. I am extremely frustrated with this, and if you can help, please do so because it's important that i fix this phone. If you have any questions, please feel free to ask!
Hi there, thank you for the welcoming me to the forums. No, my phone is not rooted, it has always been gingerbread etc i never tried rooting because i never knew how:/ I believe this started when i was just browsing around facebook, so i'm not entirely sure what happened... Uhmm i tried going to download mode through the volume keys and power button when it's connected to usb to the i think it's odin3? and it'd be in the download mode but as soon as the computer says it's connected, the phone would just turn off again and bam, it's like nothing ever happened. My phone does charge when it's plugged in, but it doesn't show it's being charged but i remember my battery was dead last night and i charged it till today and now it's got power. ANd no i don't have a warranty:/ i really hope you can help me

Sounds like a faulty power button. Check out Mobiletech video for thier power button repair service.
http://mobiletechvideos.mybigcommerce.com/samsung-galaxy-s-ii-t-mobile-power-button-repair/
Sent from my SGH-T989 using xda premium

[Q] Help!!! Only on For seconds?

So today my phone started to power it's self off. When I power on it shows the kernel screen for a few secs then powers off. I can boot into Recovery (CWM) and when I select reboot it does the same. If if I boot in to Download Mode, it only stays on a few secs.
Is it the power button? Any ideas?
I'm running the BMS Kernel and C-Rom 6.6. I have had this same rom and kernel for weeks with no issues.

djdoubt03 said:
So today my phone started to power it's self off. When I power on it shows the kernel screen for a few secs then powers off. I can boot into Recovery (CWM) and when I select reboot it does the same. If if I boot in to Download Mode, it only stays on a few secs.
Is it the power button? Any ideas?
I'm running the BMS Kernel and C-Rom 6.6. I have had this same rom and kernel for weeks with no issues.
Click to expand...
Click to collapse
Sounds like your battery is dying. Might wanna look into getting a new one.

BWolf56 said:
Sounds like your battery is dying. Might wanna look into getting a new one.
Click to expand...
Click to collapse
Interesting, I have not had any issue with the battery. I'll look into it. Any way to test without using another battery?
Anything else it could be?

Using CWM built in key test it seems it is the power button, when I touch the power key it reads as if it is being touched multiple times or heklod down. Any Fix without replacing the button?

Not that I know of I have only seen replacing it fixes it

Ive seen several people report that opening it up and jiggling the button can help, but when it does it is only temporary.

djdoubt03 said:
Using CWM built in key test it seems it is the power button, when I touch the power key it reads as if it is being touched multiple times or heklod down. Any Fix without replacing the button?
Click to expand...
Click to collapse
It's fairly easy to replace. You can buy a button off ebay for fairly cheap and look on YouTube to replace it.
Sent from my SGH-I747M using XDA Free mobile app

I agree it sounds like a stuck power button. My experience with this problem first showed in a captivate of my moms. It was very bizarre tho. On stock ROM it would constantly do the vibrate, cycle, vibrate etc. On a custom ROM however, it has had zero problems with the power button. Maybe try that? Not a sure fire fix, just telling what happened with the Cappy. ☺

If this is power button problem you can try (what i did and worked, but it is your choice and you can damage your phone) drop little of oil in power button and press couple time with out battery in phone.

norbarb said:
If this is power button problem you can try (what i did and worked, but it is your choice and you can damage your phone) drop little of oil in power button and press couple time with out battery in phone.
Click to expand...
Click to collapse
That's actually fairly dangerous for your device. I would suggest an air duster if you think it's dirty.

I'm actually having the same problem. It just started his morning.
The phone won't boot normally. I get the kernel boot screen, sometimes a Samsung screen, and then it turns off. 2-3 seconds max.
I can get it into download mode, but after 3-4 seconds, it spontaneously shuts off.
Recovery mode (CWM) is completely stable. I can get in, make back ups, perform a key test, etc. When I run a key test, it shows that the power button is a little sensitive, but not crazy. If I jiggle it some (mostly back a little) it registers a key press, even if I'm not fully pressing it. If I do press it fully, sometimes it doesn't register.
If this is really a button issue, why is recovery stable? Even if I put the phone on a flat surface with nothing that could touch the button, the phone still doesn't stay in download mode (it just shuts off.) When I put the phone in recovery, place it on a flat surface, and perform the key test, the phone isn't registering a key touch.
I've tried 3 different batteries, kept the phone plugged in, popped the battery and held the power button to discharge everything, wiped the cache, wiped dalvik cache, and used CWM touch to reboot (and avoid the power button all together.)
The only think I can think of that's maybe different is that gapps was FC'ing more than normal this morning (before the phone crapped out.)
I'm running StockMOD ROM 4.4.2 R2 with the Ktoonsez Kernel for TouchWiz 4.4.2.
EDIT: Also, when it's plugged in, the LED doesn't light up. I'm not sure that it's actually charging. I do have a wall charger, so I can verify that the batteries I'm using are charged.

Try flashing a different rom from recovery to see if it still happens. Also try a factory reset. If you get as close to stock as possible and it still happens it raises the probability thst its hardware.
If you put the battery in and wait a few moments does it turn on by itself?

Band-aid
@DocHoliday77 I messed with the phone a little later tonight and recovery became unstable. I'm convinced it's a power button problem now. I think the internal mechanism gets stuck and that's the issue.
When I put the battery in, the phone does try to boot by itself.
I used the advice in this post: http://forum.xda-developers.com/showthread.php?p=53915864 and I was able to get up and running again. I opened the phone up, blew some compressed air on the button, tapped the flat side of the button lightly a few times with the end of my screwdriver, and put everything back together. I was able to get back into recovery, and then reboot normally.
I ordered a new power button and I plan on replacing it next week when it gets here, just to be on the safe side.
You guys at xda are life savers!

The booting up on its own after inserting the battery is a classic symptom of the power button going bad. Glad to hear you got it working for now, and that you are ordering a replacement. Everyone ive heard about getting it to work using any number of methods have always found it to only be a temporary solution.
Just a thought, in case it starts up again, maybe remove the plastic piece until you replace the switch. Hopefully that would help prevent it from getting accidentally pressed in your pocket or by bumping it into something. (You could probably still access it with a toothpick or something like that if needed)

I agree it's the power button. I just posted about my little experience on Google+
I tried seriously whacking it on the floor and everything. I wouldn't recommend that but I had no warranty and no funds for repair. Others had said that beating the crap out of it worked so I thought why not lol...
https://plus.google.com/116004961340303353216/posts/ig2ogLeUWJ8
Long story short, my beating it up didn't work but it did wake it up. It falling on the floor however, jarred whatever was stuck and it now works like a charm...good luck

Stuck in downloadmode, Screen off, tablet won't respond, explanation inside

So, after flashing the latest firmware from sammobile for the Galaxy Tab S 10.5 with Odin, I am now the not-so-proud owner of a what seems to be unresponsive - working - device.
Let me explain:
I just downloaded the latest firmware from sammobile.
I followed the instructions from sammobile, which basically says normal flash with Odin.
Plugged it in, started Odin, put the file in the right place and started the flash.
Odin does its thing, everything goes well, device is showing me a nice blue dotted bar which is filling up slowly, good.
And then suddenly Odin reports "FAILED" after is was done with /system.
Device has stopped working, blue bar not filling anymore.
I reset Odin with hope to restart the flash, with no result.
The device is not being recognized anymore by USB, and it's now stuck in the "odin mode" screen.
After seeking some advice on IRC I found that the only way to get the power off is to unplug the battery, which is harder that it sounds.
So after a good 30 minutes of carefully prying and making my way around the tablet I managed to get the cover of.
As I'm looking at the naked device and wondering "how the hell do i get this battery out". This is not like a normal phone or laptop or any kind.
I found a couple of little screws, 4 of them, around the battery so I unscrewed these and the battery came 'loose' but was held in place by 2 flat cables which I couldn't remove.
Put them back in, and all of a sudden my tablet's sceen was 'off', but I'm not sure it's really powered off because the powerbutton has no response.
I'm stuck and it the thought of just binning the tablet is frustrating me.
Anybody got any ideas of what this might be and how to fix it?
[edit]
I found out it wasn't powered off, it was just the screen. I could feel the CPU was still emitting heat.
So I unplugged the battery, let it cool down for a couple of minutes, plugged it back in, and now there is nothing.
No screen, no usb recognition, no power.
Any suggestions are appreciated.

You didnt need to take out the battery. Your should have exit download mode by doing power, home, vol down buttons for 30 seconds and it should reboot and you could of tryed again. If that didnt work you could have let it drain. Im not sure about helping with the battery part as i never opened it.

easy fix - check http://forum.xda-developers.com/showpost.php?p=50412284&postcount=8
no need for draining the battery. tested and it works. happens once to me, use above method and problem solved.
can use my modded version attached, but, please be aware, it's ONLY FOR RESETTING THE STUCK DOWNLOAD MODE !

DUHAsianSKILLZ said:
You didnt need to take out the battery. Your should have exit download mode by doing power, home, vol down buttons for 30 seconds and it should reboot and you could of tryed again. If that didnt work you could have let it drain. Im not sure about helping with the battery part as i never opened it.
Click to expand...
Click to collapse
I tried that, but didn't work. The tablet was/is unresponsive. Draining wasn't an option, battery was just fully charged.
freaksamael said:
easy fix - check http://forum.xda-developers.com/showpost.php?p=50412284&postcount=8
no need for draining the battery. tested and it works. happens once to me, use above method and problem solved.
can use my modded version attached, but, please be aware, it's ONLY FOR RESETTING THE STUCK DOWNLOAD MODE !
Click to expand...
Click to collapse
Thanks for this! Am going to try this once my screen works again.
At this point it goes 'on' but the screen doesn't, and there is still no USB recognition so I guess I got a nice expensive paperweight

[Q] SM-T700 Froze, Powered off - Soft bricked?

Hey guys,
Appreciate it if you could spare me some advice on how to proceed.
So I was watching a twitch stream and all of the sudden tablet froze, and the audio froze as well causing a large super high pitch noise, I hard-reset the tablet but instead of resetting it just turned off, I started to browse the forums and found that a combination of (POWER + VOL UP & DOWN + HOME) would reset the tablet,now what this did for me is turn the tablet on but it was stuck in SD CARD Mode, back again to the forums, read that letting it discharge fully and then it will be able to be charged and turned on, that worked tablet was back doing some various tasks no video again and then boom freezes again same symptoms except this time I couldn't get it to go to SD CARD Mode its very finicky after trying at various times in the day I finally got it to work, same process except this time as soon as it turned on I went into recovery factory reset it to stock, worked a bit longer this time only installed chrome, and it froze again (don't think it was chrome) , rinse repeat and I flashed the latest firmware with ODIN worked fine, I've gotten to the home screen ran through the "factory new" set up and it turned off of me again.
I plugged it in let it charge, came up with battery icon 5% 10% ect, then I left it for a while, I came back and I cant even get it to show the battery percentage(tap power) let alone turn on.
I'm fairly sure that eventually I can get it turn back on but from there I don't know what to do.
TL;DR - Tablet Froze, Hard Reset, Froze again - Rinse Repeat, ODIN to latest STOCK firmware, tablet worked for 5 min before turning off again (plugged in), present situation
Any ideas as what to be causing the freezing and how I could remedy it?
Also sometimes when it froze it turned itself off without me hard resetting it.
Thanks its been driving me insane,
Please do not hesitate to ask me to clarify or provide more information so I can help you help me.

Maybe youve got the loose battery connector problem?

ashyx said:
Maybe youve got the loose battery connector problem?
Click to expand...
Click to collapse
What would you suggest I do, submit it to warranty ? Will they disregard the fact that knox has been tripped if its a hardware issue ?

sunb3ar said:
What would you suggest I do, submit it to warranty ? Will they disregard the fact that knox has been tripped if its a hardware issue ?
Click to expand...
Click to collapse
I had the loose battery connector problem, but the symptoms do not sound the same as mine. I could get mine to boot up, but the screen would flicker and a few white lines would appear before it would reboot itself. I actually started a ticket with Samsung and got the packaging label but, upon further reading, realized that I was pretty much SOL after tripping knox, and didn't want to risk the chance of getting charged for just sending it in. If it is indeed the loose battery connector, you should be able to remove the back cover yourself and fiddle with it. Ultimately, mine needed re-soldering, and I was able to find a local electronic repair shop to do it for me for cheap.
Good luck!

UPDATE: I've managed to get into SDCARD MODE yet again, except discharging seems to get out of it, but once I plug it back in it doesn't come up charging it just black screen, until I hold some buttons and arrive back at sdcard mode. Good times.
Trying various things to get it to boot..
EDIT: Appreciate the insight Squez, I want to exhaust all the other options before opening it myself, if Knox didn't void the warranty to some degree, opening it up should put the final nail in the coffin.
EDIT2: Good news, sort of, tablet isn't dead! after numerous attempts with charge SDCARD mode, discharge, It finally start to charge properly and I managed to get it to boot, worked for a few hours then I left it to charge, and went to sleep, woke up and wont turn on again, but I am in SDCARD Mode again but need wait for it to discharge from presumably 100% ....

[What do you mean Sd card mode? DOWNLOAD mode?
Also no need to let the battery drain.
Just press VOLUME DOWN(not volume up) and POWER together then hold until it restarts.
This is a hard reset and will ALWAYS work unless the device is hard bricked. It is the equivalent of a battery pull.
I continually see here and there incorrect information regarding key combinations, even in so called guides, this forum is even guilty!
Here is what works on the 10.5lte, as far as I'm aware its the same for all versions, indeed pretty much any Samsung device.
HARD RESET:
VOLUME DOWN - POWER.
Hold until the device restarts.
DOWNLOAD MODE:
HOME - VOLUME DOWN - POWER.
Hold until the device boots.
RECOVERY MODE:
HOME - VOLUME UP - POWER.
Hold until the device boots.

ashyx said:
[What do you mean Sd card mode? DOWNLOAD mode?
Also no need to let the battery drain.
Just press VOLUME DOWN(not volume up) and POWER together then hold until it restarts.
This is a hard reset and will ALWAYS work unless the device is hard bricked. It is the equivalent of a battery pull.
I continually see here and there incorrect information regarding key combinations, even in so called guides, this forum is even guilty!
Here is what works on the 10.5lte, as far as I'm aware its the same for all versions, indeed pretty much any Samsung device.
HARD RESET:
VOLUME DOWN - POWER.
Hold until the device restarts.
DOWNLOAD MODE:
HOME - VOLUME DOWN - POWER.
Hold until the device boots.
RECOVERY MODE:
HOME - VOLUME UP - POWER.
Hold until the device boots.
Click to expand...
Click to collapse
I should of posted a photo earlier but here is one I found on google of same screen: (check attachments)
Except UP KEY and DOWN KEY don't do anything, its just this screen, if you attempt to hard reset ect, it will just reload this screen, hence the discharge, then plug it back in and hope it begins to charge "battery icon appears". I have gotten it to boot like this a few times.

sunb3ar said:
I should of posted a photo earlier but here is one I found on google of same screen: (check attachments)
Except UP KEY and DOWN KEY don't do anything, its just this screen, if you attempt to hard reset ect, it will just reload this screen, hence the discharge, then plug it back in and hope it begins to charge "battery icon appears". I have gotten it to boot like this a few times.
Click to expand...
Click to collapse
Wtf
How did you get to that mode? Looks like its trying to flash from the sd card. Ive seen safe mode but not that.
see here: http://forum.gsmhosting.com/vbb/10127092-post62.html

ashyx said:
Wtf
How did you get to that mode? Looks like its trying to flash from the sd card. Ive seen safe mode but not that.
see here: #
Click to expand...
Click to collapse
Yeah its strange as.
I'll have a look at that, thanks.
EDIT: It just finished discharging and now I am on the battery screen.. Usually once it charges here I can get it to boot, what I'm curious is what on earth keeps causing it to freeze up, because in download mode and twrp (gone since i flashed stock via odin) it wouldn't freeze at all, only have issues with it once its booted or charging. I installed a logcat earlier hopefully that should shed some light on the situation,
EDIT2: Well another very interesting thing, the official Samsung charger wont charge it, only works if I plug it into pc or use a non-official charger, strange thing is nothing is wrong with the samsung charger or cable since I can charge my phone fully from it. These have to be some of the strangest symptoms.
EDIT3: Only works through USB port on PC for now, non official charger comes with red X on battery once booted. I assume you can work around this once rooted but that's for another time..
EDIT4: Charge through pc to around 2-3%, boot device, plug into official samsung wall charger and it begins to charge properly.
EDIT5: Hooray back to step one, trying get into SDCARD Mode, same thing happened left it overnight and it wont turn on or charge anymore.

ashyx said:
Wtf
How did you get to that mode? Looks like its trying to flash from the sd card. Ive seen safe mode but not that.
Click to expand...
Click to collapse
i am pretty sure the HOME - VOLUME DOWN - POWER. puts the 10.5 into the sdcard mode.
my tablet is doing very similar to sunb3ar findings.
have had it come back to me once from sdcardmode.. (let if go flat and starting charging then it would start via normal buttons)
it crashed not long after that. it got stuck in sdcard mode again, but this time none of the drain flat, put on charge has worked.. just blank..
fyi- we try to put it in RECOVERY MODE, but it does not work when in this crashed / sdcard mode state
i even disconnected the battery and then plugged back on charge.. nothing..
today i tested the battery volts, 2.8v , for a 3.8v i thought that was ok. i attached my RC lipo multi charger set to 1amp 3.7volt charge, direct to the - + on the battery- got it up to 3.5v, plugged back in, put the charger on- the sdcard mode (most life it has shown in a week).
still not coming up with 'battery' display to say its 'turn-off and being charged'. just the sdcardmode might disappear and return..
i am currently adding mode charge to battery... will try to HARD RESET next.. since i have not tried that combo yet..
HARD RESET:
VOLUME DOWN - POWER.
Hold until the device restarts.
edit: i took it off 'direct' charge, battery at 3.7volts.. then plugged in normal charger, i got a 'battery symbol' but it had the lightening bolt, not a %.. so i unplugged and reconnected to my direct charge to give the battery more volts. i am surprised that the unit seems to think a battery with 3.8volt as it specs seems to not be like with volts not much lower than 3.8.. could be time for a new battery if we can get this thing to restart

Stock Robin won't turn on, what now?

Cross-posting this from r/NextbitRobin
So Tuesday night before bed I went to check my phone (which had been on the charger for the last couple hours and so was at >95%) and noticed the volume button was not responding. I figured something buggy was going on, sometimes I need to reboot my phone every couple of days to get it to work properly (especially if it had run down into low power mode before recharging), so after unplugging it from the charger, I held down the power button, selected reboot, and clicked okay. The phone then proceeded to shut down, but not start back up.
When I tried to start it up again by holding the power button, I got no response initially. Then I was able to get it to buzz/vibrate, but the screen never came on.
I tried holding down the Vol- button and the power button together for 20 seconds to force a reset, and it vibrates a couple of times, but nothing happens.
If I plug it into a charger, I don't see any LEDs illuminate, and it just vibrates approximately every 3 seconds (not continuously, it seems to have some semi-random pattern). If I unplug it, the vibrating stops, but I still can't get it to turn on. It does not seem to make a difference if I am using a wall charger or trying to charge it off my laptop.
I have not rooted the phone or installed any custom ROMS, and have had it since I bought it on Amazon in June of 2017.
Any ideas what might be the issue? Any tips for reviving my phone?
This doesn't seem to match anything I have been able to find with some basic google searching.
Edited to add that I also tried removing the sim card and starting it up without one, but that did not appear to make a difference.
Update: I left it plugged into a wall charger for about 18 hrs and when I came back there was no change in behavior.

This many sound repetitive but lets first get the obvious out of the way so that we are sure you tried the most basic things for sure.
Is there an issue with the cable not able to charge the device? Can you try changing the cable?
Power + volume down for 30 secs / 1 minute / few minutes. This usually helps, sometimes more than 30 seconds for some reason. Try doing it while plugged in.
When you connect to the laptop what happens? Does it power on for a minute or vibrate?
Do you have adb installed on your computer? does you device get detected on your laptop?

/root said:
This many sound repetitive but lets first get the obvious out of the way so that we are sure you tried the most basic things for sure.
Is there an issue with the cable not able to charge the device? Can you try changing the cable?
Power + volume down for 30 secs / 1 minute / few minutes. This usually helps, sometimes more than 30 seconds for some reason. Try doing it while plugged in.
When you connect to the laptop what happens? Does it power on for a minute or vibrate?
Do you have adb installed on your computer? does you device get detected on your laptop?
Click to expand...
Click to collapse
Tried charging it with both the OEM cable as well as an amazon basics USB-c cable (both of which had been used to charge the phone successfully in the 24 hrs before it went wonky), no noticeable difference in behavior.
Held the power + volume down buttons for 180 seconds, did not boot. Repeated this with it plugged in (wall charger) and it still did not boot.
When I connect it to my laptop, I get the same behavior of vibrating as when plugged into a wall charger, but it does not boot or power on, nor does the laptop detect the phone in any fashion. I do not have adb installed on my laptop.
Anything else I can try, or is the phone a write-off at this point?

First step to solving any device issue is to somehow boot it and get in any mode possible. Since you can't do that I can't think of any other way to get it working.

I'm having the same issue, phone is not giving me any signs of life...frustrated at the moment

It's a total long shot, but try carefully cleaning out your charge port with a needle or a small pin and a little bit of alcohol. I pulled quite a bit of pocket lint out of mine and it works fine now. It didn't look like it was that dirty, but I pulled out a large ball bearing sized amount.
Other than that the only other thing I can think of is that your battery might be shot. It might have been taking enough of a charge to try and turn on, but not enough to do so.