Develop Bugs

[Q] Booting problem

hi. I encountered a problem on my phone that doesn't boot properly.
When i tried to switch on my phone it showed at first the welcome msg "Samsung S4 mini gt-i9192" then after that, a pitch black screen, could not properly boot. But i learn that it does not turns off after the screen turns all black, i have to press the power button first to turn off the phone.
This problem started when i installed an app with some compatibility problems.
I wanted to root my phone hoping that can solve the problem, but then again a problem occurred when i tried to connect my phone to my laptop. It fails to install MTP usb device to my computer. I tried connecting it again provided that samsung kies was installed but again failed to connect my phone. Therefore i cant root my phone because i cant copy the files needed to root to my phone sd card.
I tried reinstalling kies, installing mtp drivers but nothing happened. I tried also restoring the previous boot image, restoring factory settings using recovery mode. But then problem still exist.
And fyi my phone can't mount any external sd card using recovery mode. And i think it was not in a debugging mode.
Phone: samsung s4 mini gt-i9192
firmware: i dont know
So basically, the problem is:
my phone wont boot,
i cant connect it to my pc
and i cant root it.
How should i root or even flash my phone when i cant connect to my computer? Do you have any idea on how to solve this problem? Any solutions or suggestions would be much appreciated. tnx.

champagneerantja
emzgames said:
snipped.
Click to expand...
Click to collapse
Have you tried putting the phone in download mode (Volume Down + Home + Power) and then connecting it your p,c , if not give this a shot it should pick up the drivers , once done , take out the usb cable hold the power the button to shut down and boot up .
since you have not mentioned your OS am assuming it is windows , try taking out Kies via some software like revo uninstaller which will remove all directories plus all registry entires then reinstall it if you really need it.

dovakinn said:
Have you tried putting the phone in download mode (Volume Down + Home + Power) and then connecting it your p,c , if not give this a shot it should pick up the drivers , once done , take out the usb cable hold the power the button to shut down and boot up .
since you have not mentioned your OS am assuming it is windows , try taking out Kies via some software like revo uninstaller which will remove all directories plus all registry entires then reinstall it if you really need it.
Click to expand...
Click to collapse
tried both yet still unable to connect.

emzgames said:
tried both yet still unable to connect.
Click to expand...
Click to collapse
dial *#0808# from your cell this would take you in usb settings, tick both mtp+adb , reboot , if they art already ticked uncheck them and check them again.

dovakinn said:
dial *#0808# from your cell this would take you in usb settings, tick both mtp+adb , reboot , if they art already ticked uncheck them and check them again.
Click to expand...
Click to collapse
im afraid i cant do this coz i cant boot my phone properly, up to welcome msg only then screen black out, but not power off.

emzgames said:
im afraid i cant do this coz i cant boot my phone properly, up to welcome msg only then screen black out, but not power off.
Click to expand...
Click to collapse
ohhh best take your cell to your nearest service center then . if you can't flash anything and usb is not getting detected i don't see any other option , maybe someone more experienced here can help.

dovakinn said:
ohhh best take your cell to your nearest service center then . if you can't flash anything and usb is not getting detected i don't see any other option , maybe someone more experienced here can help.
Click to expand...
Click to collapse
yah, thats what im thinking. i just brought this here hoping to solve this problem without going to a shop. thanks anyway.

aac. To me put your phone in download mode then use moborobo(a windows software) . Just open it and it will install the driver. If it dies not work then use adb installer . Remember you should have only any one of the software at one tim means either moborobo or kies or adb installer
Sent from my GT-I9001 using xda app-developers app

btw have you tried to boot the phone in safe mode ?? if it boots in safe mode it is still fixable without going to service center. power down , power up+ tap the menu button 3 or 4 times at THE same time to boot into safe mode if it boots into safe mode that means the hardware and OS is fine if it does not well then your out of luck.

dovakinn said:
btw have you tried to boot the phone in safe mode ?? if it boots in safe mode it is still fixable without going to service center. power down , power up+ tap the menu button 3 or 4 times at THE same time to boot into safe mode if it boots into safe mode that means the hardware and OS is fine if it does not well then your out of luck.
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Click to collapse
tnx man, but no luck..

Tried flashing a custom rom?

Cant enter fastboot ＆ recovery mode！

Hello，everyone,i got a problem that i cant enter fastboot and recovery mode.
today ,i installed CM12 22/7 upgrade ,and before i install this ,i did a backup of build.prop because i have V4A and every time i upgrade CM i have to change this build,prop ,so i want make a copy and when i finish upgrade i can just move that file without do anything ,and everything goes well, i installed upgrade and installed V4A driver ,it says i need restart,so i restarted,but after LG logo ,screen turn black, cant enter system ! i thought maybe i flash CM one more time can repair this,so i press POWER and volume down,but,nothing happen ,after LG logo,and screen turn black,and i try to enter fastboot mode ,its the same ,when LG logo shows screen turn black.......
My phone is LG d855,and my English is bad,i hope you can understand
Can anybody help me?

did you try entering Download mode?

Phone stuck in bootloop, help please
wrong trhead

Are you sure you there is no fastboot and no download mode?
You can enter download mode by pressing and holding the “Volume Up” and connecting the USB cable from phone to PC
If it works then you Soft bricked it...And you can use this guide to fix it:
http://forum.xda-developers.com/showthread.php?t=2785089
.
.
.
BUT if that does not work then you Hard bricked the phone
I had that problem because of flashing with faulty win8 drivers...no download mode or fastboot, all i got was security warning and bootloop. The only way you can fix hardbrick is through JTag, but i don't know if you can fix it without paying someone money, because you need special hardware to do it. You can find people on ebay that can fix it but it will cost you 30-50$.
I sent mine to warranty...they didn't know what was wrong with it and couldn't fix it...and so they just replaced the motherboard. If you have a warranty then send it and do NOT!! tell them you flashed it or rooted it. Tell them you don't know what happened...The chances of them finding out is very small.
If ebay and/or warranty not work, then there was an article on the Internet to fix a hard brick but for some reason it is now password protected...i do not know why....You can send the owner an email so he can give you the password.
http://www.androidbrick.com/unbrick-recover-your-dead-lg-g3-g2-all-variants
...There is another article but it is in Portuguese
http://arena4g.com/forums/topic/tutorialunbrickhard-unbrickd855
But then again you cant be certain this will work either.
Conclusion: Fk LG...They don't want people upgrading their slow buggy software.

Alex_XV6700 said:
did you try entering Download mode?
Click to expand...
Click to collapse
i cant enter download mode,always turn black after LG logo

Disconnect cable from pc and phone
Press power + vol -
You will get first black screen, keep pressing until lg logo appears and it shuts off completely.
Then press just vol + and reconnect cable to computer.
That should leave you in download mode or fastboot.

Alex_XV6700 said:
Disconnect cable from pc and phone
Press power + vol -
You will get first black screen, keep pressing until lg logo appears and it shuts off completely.
Then press just vol + and reconnect cable to computer.
That should leave you in download mode or fastboot.
Click to expand...
Click to collapse
no,when i reconnect phone,and only press volume + ,its shows i am Charging then phone is off.......cant enter download mode,but i found when i press volume +and- , i can enter hardware key control mode,but there only have 3 choice,cancel , mode on and mode off,i have tried mode on and mode off,doesnt work.

rubisco1 said:
Are you sure you there is no fastboot and no download mode?
You can enter download mode by pressing and holding the “Volume Up” and connecting the USB cable from phone to PC
If it works then you Soft bricked it...And you can use this guide to fix it:
http://forum.xda-developers.com/showthread.php?t=2785089
.
.
.
BUT if that does not work then you Hard bricked the phone
I had that problem because of flashing with faulty win8 drivers...no download mode or fastboot, all i got was security warning and bootloop. The only way you can fix hardbrick is through JTag, but i don't know if you can fix it without paying someone money, because you need special hardware to do it. You can find people on ebay that can fix it but it will cost you 30-50$.
I sent mine to warranty...they didn't know what was wrong with it and couldn't fix it...and so they just replaced the motherboard. If you have a warranty then send it and do NOT!! tell them you flashed it or rooted it. Tell them you don't know what happened...The chances of them finding out is very small.
If ebay and/or warranty not work, then there was an article on the Internet to fix a hard brick but for some reason it is now password protected...i do not know why....You can send the owner an email so he can give you the password.
http://www.androidbrick.com/unbrick-recover-your-dead-lg-g3-g2-all-variants
...There is another article but it is in Portuguese
http://arena4g.com/forums/topic/tutorialunbrickhard-unbrickd855
But then again you cant be certain this will work either.
Conclusion: Fk LG...They don't want people upgrading their slow buggy software.
Click to expand...
Click to collapse
thx for your reply. i tried many times with different way,try to enter download mode or fastboot .......but failed.and now i decided buy Nexus 6

Bricked Swift

Hello Everyone!
I recently tried to root my wileyfox swift but failed miserably. I did the following when fastbooting the recovery image -> fastboot flash system ****.img.
However, i realized my mistake too late, and now my phone is all messed up!
The phone doesnt show anything when i try to start it and i cant access fastboot again, to undo my mistake. My device manager recognizes my phone when its plugged in to my computer but i cant access any files.
Am i screwed or is there any solution to this?
Thanks in advance!!

Try to access the bootloader with the hardware button combo first (volume down + power / volume up + power). If you get into recovery, you will be able to get to the bootloader with adb or a menu entry. Depends on what recovery you have installed for the latter.
In case you have no access to the bootloader (proper soft brick), go for the QFIL method. Avoid using it unless there is no other option.
Here is the thread:
http://forum.xda-developers.com/wileyfox-swift/general/how-to-set-device-tampered-to-false-t3276317

Cant access bootloader.
However, tried your second option and it went well until i got "SaharaDownload fail" at the last step, and now my computer doesnt recognize the phone in device manager. It does not show anywhere that my phone is connected.

narmista said:
Cant access bootloader.
However, tried your second option and it went well until i got "SaharaDownload fail" at the last step, and now my computer doesnt recognize the phone in device manager. It does not show anywhere that my phone is connected.
Click to expand...
Click to collapse
Does the phone give any indication of being connected? Notification light, starting the display, etc?
If yes, make sure the phone is in the correct mode and check the drivers - some of the other forum members mentioned this and the gymnastics around the battery. This would be on my to-do list. The device might come up on the device manager as different one, so monitor the manager for any changes once you connect the device.
If you happen to have Windows 7 device laying at you house, you can try with it (if only not to worry about compatibility and sporadic Win10 behaviour).
It will be a good idea to check the turkish website for General Mobile 4G (one of the Android one derivatives of the hardware) where some people have faced similar problems using the same tool.

narmista said:
Cant access bootloader.
However, tried your second option and it went well until i got "SaharaDownload fail" at the last step, and now my computer doesnt recognize the phone in device manager. It does not show anywhere that my phone is connected.
Click to expand...
Click to collapse
If you need my help via TeamViewer then WhatsApp me at +27799261595 or pm me

Finally got my phone back on the device manager! However, I still get sahara error when trying the back to false method.
imgur.com/a/FsSX0
*It says no port available since i removed the phone*

Root SM-A510F [A5 2016]

Hey,
I've tried rooting my SAmsung A5, however, I somehow cant access the teamwin/twrp menu.
I put the SUFile on my phones internal storage, USB DEBUG mode is on and OEM Mode as well-
I've flashed the twrp file with odin on the mobile successfully, however, now I'm stuck.
Whenever I press the volume up, homebutton and powerbutton after leaving the download mode the mobile just restarts the whole time and never accesses recovery mode until I release the keys and afterwards the phone just boots like usually, when I restart the phone and try to access the menu again a menu opens which says no command or something like that...
I also bricked the mobile after trying a few thing but restored it to stock firmware again, however, rooting still does not work..
can someone help me out?

MEHEYVISSE said:
Hey,
I've tried rooting my SAmsung A5, however, I somehow cant access the teamwin/twrp menu.
I put the SUFile on my phones internal storage, USB DEBUG mode is on and OEM Mode as well-
I've flashed the twrp file with odin on the mobile successfully, however, now I'm stuck.
Whenever I press the volume up, homebutton and powerbutton after leaving the download mode the mobile just restarts the whole time and never accesses recovery mode until I release the keys and afterwards the phone just boots like usually, when I restart the phone and try to access the menu again a menu opens which says no command or something like that...
I also bricked the mobile after trying a few thing but restored it to stock firmware again, however, rooting still does not work..
can someone help me out?
Click to expand...
Click to collapse
Sorry, you are in the a5 2017 forum not 2016. Anyway I think this should help you. DO NOT use the twrp files from there though. https://forum.xda-developers.com/sa...w-to/guide-root-install-twrp-samsung-t3747535

How to rescue data from J2 Prime stuck on boot-loop with no access to recovery mode?

Hi, hope someone can help me!
I accidentally got my Samsung Galaxy J2 Prime SM-G32M stuck in a boot loop, it happened after i tried to put a micro-sd card in it, after i removed the micro-sd it stayed on boot loop and couldn't boot into recovery (in Enigma NL for J2 Prime there is a bug where you need to enter TWRP and reboot into system for it to turn on properly because when you turn it off the Kernel dies)
It seemed like it couldn't boot into download mode as well but i eventually got it to enter download mode, my computer does not recognize the device, i am not sure but i assume usb debugging is not enabled due to that, it doesn't have root and it uses Enigma NL Custom ROM: https://forum.xda-developers.com/t/rom-6-01-stable-g532xx-enigmanl-port-rom-for-j2-prime.3951387/ and this TWRP port: https://forum.xda-developers.com/t/...axy-j2-grand-prime-plus-sm-g532f-g-m.3616589/
The home button is a little bad and doesn't work from time to time but i don't think it is the reason of it not being able to enter TWRP. The only thing i've got is download mode, no recovery and probable no usb debugging as well, i really need the data inside but i haven't found a way of rescuing it that doesn't require USB debugging or entering recovery mode . Is there a way that i can either access recovery mode or rescue the data inside the phone without it?
I really need the data inside the phone and programs like Samsung Switch said they couldn't connect to the phone properly, plsss help
(I also tried ADB to enter recovery mode using the command line but ADB does not recognize my device even when it is turned on(on boot loop) and also when it is on download mode.)

My computer does not recognize the device.
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Click to collapse
Did you install Samsung drivers correctly on your PC? If not then this would explain why your PC failed to recognize your device.
I suggest you install those drivers right away, and test to see if it works.