Phone stuck on boot loop, can't recover. - Xperia Z2 Q&A, Help & Troubleshooting

I was trying to root my device with the help of this http://forum.xda-developers.com/xpe...ck-d6502-03-23-4-0-546-completeguide-t3171219. I'll admit right now that I have no experience in such manners and this is my first root.
Anyway, after successful flashing of device I unplugged it after closing Flash and turned it on only to find it in a constant loop where it just freezes at those waves and starts over. This is too early for the recovery mode option but I tried to press volume up or down repeatedly and the phone just ignores my attempts. PC can't read it normally but it sees it as a 'hidden' file under the name of Removable Device.
In a moment of panic I pressed the little emergency red button next to the charge port and to no avail , nothing changed or got worse, I don't think it can even if it tried. (I'm still worried this step might have ruined everything).
Please help!!
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EDIT: Fixed. Sorry for wasting your time.

I have the same probleme ...can anyone help Us please? :'( :'( :'(

I hope that flashmode and fastboot work.
If so, turn the phone off. Prepare flashtool with an ftf (keep wipe data checked), press flash and then connect your phone in a flashmode.
Sent from Xperia Z2
Luckily not from an iPhone = Yesterdays technology at tomorrows prices

No need to be in panic
simply download and flash any ftf files for your device model number by using flashtool. Please read properly how to install and use flashtool
http://xperiafirmware.com/8-firmware...peria-z2-d6503
ask for any question

Related

[Q] Xperia X10 bricked...!!!

Hey, I know this is not correct place for Xperia X10 issue's, but i need to display it in general section, as this one is getting critical..
I uploaded a custom rom on my xperia x10, for that i unlockd the bootloader and stuff..
Now, my phone is switched off since 15 days, when ever i try to switch it on, it vibrates once and nothing at all afterwards...if i press power button again, it won't vibrate, unless and untill i remove the battery and reinsert it in phone..
i see three red flashes of light, when connected to PC..
1. PC Companion for update, repair and custom repair is not working...most of the time phone is not detected..
2. SE-update service is also not working and phone is shown as Xperia arc..
3. Flashtool, doesn't recognize the handset
4. few, technician told me box flash would work, but again, it didn't work out
Now, i don't know much about this, but i do understand that hardware seems to be good, till now, the only issue is software and that to initial boot process i.e. bootloader.
is there any other way i can upload a new custom rom on my xperia ??
or any other solution, will be appreciated..
I'm assuming download mode didn't work? Pull battery and insert cord/battery/press back button at same time while aytempting to flash through flashtools?
I have tried flash tools with this method, but doesn't helps..
I don't know about download mode, is it the same done through PC companion..
Thanks
icenight89 said:
I'm assuming download mode didn't work? Pull battery and insert cord/battery/press back button at same time while aytempting to flash through flashtools?
Click to expand...
Click to collapse
I had the xact same problem and this worked for me..THANKS A LOT..i owe you one
Same issue
I have a similar issue.
When I try to flash it through flashtool, I get this error
"ERROR - ERR_SEVERITY="MAJOR";ERR_CLASS="SECURITY_CLASS";ERR_DYNAMIC="SIN header verification failed""
Plus the phone is not also going in the recovery mode.
Please please help me.

[Q] Q Need help loaded wrong rom! Stuck to eternal boot sequence

Hi
I'm pretty sure I'm posting an extremelly noob question-cry for help.
Two days ago I tried to change the rom on my X10 mini pro. the bad thing is that I used wrong rom file possibly a rom file for the X8 and after that I'm stucked in an eternal loop sequence. The device dispays SE logo on boot and after a couple of seconds starts to load the ROM however since the rom is failed to load the system reboots after few seconds.
The bad thing is that the back key compination (five times back) doesnt obey and I can't enter to xRecovery.
I also tried SE PC Companion and Flashtool but the loop sequence disconnects the device before I try to send any command.
Any Ideas to save my phone?
In order to enter flashmode, do he following: Press the Power, Home and Back buttons simultaneously. as soon as your screen goes black, release the Power and Home buttons and keep backbutton pressed.
If you want to repair with PC Companion, keep your phone disconnected from the pc until it asks to connect it in flashmode
I really want to thank all the members here on the community.
After of few (maybe lot of) tries I managed to restore my device back to its original stock ROM.
Many Thanks
Hey buddie use the SEUS (Sony Ericsson Update Service).
I also made a similar mistake.
don't worry just use seus n it'll solve ur problem
Hit thanks if it was helpful

[Xperia U] boot loop/soft brick

While updating a new Xperia U to ICS the PCC had an error while flashing the new firmware. Now the screen lights up, the sony logo is shown for ~3-5 seconds and then it reboots.
After that I have been unable to get it recognized again by either PCC/SUS or flash tool.
I also checked my log files in Linux and no device appears.
I've tried 3 different machines (2x Windows 8, 1x Win 7), multiple USB ports. Also leaving the battery out for ~30 mins didn't change the behavior.
The green light for download mode comes on, but after about 5 seconds the light goes out and it goes into the boot loop again.
So by now I believe the device needs to be sent in, but maybe some one has a few more things I can try.
Try pressing the volume down plus volume up plus power button all 3 simultaneously till u feel 3 vibrations
Sent from my ST25i using Tapatalk 2
Can you make sure the Flashtool drivers are installed ? Go to Flashtool Directory, open drivers directory and start the setup.. Make sure to select the Flashmode and Fastboot drivers are also selected. Then, reboot System and folow this order.
Startt flashtool,select f/w, wait for Flashtool to tell you to connect to device. Then, holding the Volume down button (while phone is switched off), plug the cable into phone (The usb cable must already be connected to PC before starting the Flash Procedure )
The Order is very important.. I had same issue with U (althoguh mine crashed with Flashtool and same as what you observed. When I followed this order, I was able to get it detected and flashed )
Hopefully, you wont need to return to Service Center
let me know how it goes
Cheers ! & Merry Christmas
And yes I forgot to mention
Wrong section
Plz use question n answer section next tym
Sent from my ST25i using Tapatalk 2
drsanket_xperia_u said:
Try pressing the volume down plus volume up plus power button all 3 simultaneously till u feel 3 vibrations
Sent from my ST25i using Tapatalk 2
Click to expand...
Click to collapse
No response, I've tried holding all three buttons for a minute, but it doesn't vibrate after turning on. The only way I can turn it off is by removing the battery.
Min3r said:
Can you make sure the Flashtool drivers are installed ? Go to Flashtool Directory, open drivers directory and start the setup.. Make sure to select the Flashmode and Fastboot drivers are also selected. Then, reboot System and folow this order.
Startt flashtool,select f/w, wait for Flashtool to tell you to connect to device. Then, holding the Volume down button (while phone is switched off), plug the cable into phone (The usb cable must already be connected to PC before starting the Flash Procedure )
The Order is very important.. I had same issue with U (althoguh mine crashed with Flashtool and same as what you observed. When I followed this order, I was able to get it detected and flashed )
Hopefully, you wont need to return to Service Center
let me know how it goes
Cheers ! & Merry Christmas
Click to expand...
Click to collapse
I tried that right now, Flashmode and Fastboot drivers are installed. Flash tool is ready, device is plugged in with volume down pressed, green light comes on. Nothing is found on the PC, after about 5 seconds the green light turns off and the phone shows the sony logo. Green light also comes on if i simply plug in the usb without volume down pressed. So I'm thinking, the download mode has some how been corrupted?
drsanket_xperia_u said:
And yes I forgot to mention
Wrong section
Plz use question n answer section next tym
Sent from my ST25i using Tapatalk 2
Click to expand...
Click to collapse
Sorry about that, maybe a moderator can move my topic to the right section.
Are u connecting it properly???
Make sure when u connect ur cell to ur pc u have nt presed the power key
keep the phone off
Press the volume down button ( keep it pressed, dun
leave it) and connect it to the usb
U will see green light
Darn.. That looks bad.. That did it for me on every occasion. I think you might have a hardbrick due to the interrupted write cycle so I dont think any other way except to take it to Service Center
Sorry I couldnt help
drsanket_xperia_u said:
Are u connecting it properly???
Make sure when u connect ur cell to ur pc u have nt presed the power key
keep the phone off
Press the volume down button ( keep it pressed, dun
leave it) and connect it to the usb
U will see green light
Click to expand...
Click to collapse
Exactly what I'm doing and the green light does come on. Except it decides to go into a boot loop after it apperantly boots into download mode but doesn't stay there.
Min3r said:
Darn.. That looks bad.. That did it for me on every occasion. I think you might have a hardbrick due to the interrupted write cycle so I dont think any other way except to take it to Service Center
Sorry I couldnt help
Click to expand...
Click to collapse
That's what I've been fearing. In which case it goes back to the seller in the hope that he will send me a new device.
Moved
Is there any chance of properly reactivating flashmode by using a JTAG?
Cebalrai said:
Is there any chance of properly reactivating flashmode by using a JTAG?
Click to expand...
Click to collapse
Risky business
Jtag. ...used for hard bricked devices n. Seen max to work wid samsung phones only....
Wont recommend u too open up ur xu
Let the service center try first
Sent from my GT-N7000 using Tapatalk 2
Have you manage to recover your phone without taking it to service?
I'm in the exactly same situation... Any help is welcome...
While trying to enter flashmode, green light turns on but after some secs it turns off and sony logo appears on screen. any chance to recover this beautiful brick ?
thanks
After several tries (a lot of...) I manage to enter flashmode and SUS is now reinstalling sony ROM.
Honestly I donĀ“t know how it works this time and not the others but i'm happy with it independently of what happens.
... seems flashtool is detecting ur phone try to flash first the stock kernel and do not wipe everything it shud be in timing though.. onces it is flash charge ur phone in kernel mode (phone is off) then you can flash the stock fw of ur XU.
I bricked my phone
I bricked my xperia U as well... When i tried to power ON, it just vibrates and nothing happens, i dont even get the sony logo. When i get into flash boot mode it gets connected but after 20secs, the phone turns off again. Only fastboot mode stays on. How can i unbrick my phone??? Plz help. I made a mistake by flashing the custom jelly bean rom without flashing the kernel first.
adithyasailesh said:
I bricked my xperia U as well... When i tried to power ON, it just vibrates and nothing happens, i dont even get the sony logo. When i get into flash boot mode it gets connected but after 20secs, the phone turns off again. Only fastboot mode stays on. How can i unbrick my phone??? Plz help. I made a mistake by flashing the custom jelly bean rom without flashing the kernel first.
Click to expand...
Click to collapse
No worries. The phone turns off because it doesn't receive any signal from the PC - many people make the mistake of connecting the device in flashmode first, and then they start the flashtool etc.
Instead, load the flashtool first, go to flashmode, select a complete/full stock ftf for your phone (whichever version you want, but do double check if the ftf has kernel.sin file in it) and press the flash button. Only once you get the pop up with the animation telling you to connect the phone in flash mode, connect the phone in flashmode (volume - button pressed when connecting cable). As soon as you connect the phone, the flashtool will start its magic and your phone won't turn off.
if you can go in cwm wipe system then you will only be stuck on sony logo then use this guide http://www.youtube.com/watch?v=hPPWRXcsz7g.....it will work because this same happened to me and i fixed it with this method!
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press thanks if i helped
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using xperia u
locked bootloader
jb experience v2.1 rom

Stuck on Bootloop with Teamwin Logo

Hello
So, I first circumvented the unlocking of the Bootloader in order to root and run Titanium Backup and stuff (although I'm afraid I missed moving it outside my phone's storage ... oops :/) However, I wanted to install ParanoidAndroid and therefore followed a guide that told me to flash a boot.img from inside the PA zip via fastboot. Which I did. Well now, my device doesn't respond to anything I do. The top LED is on like it's charging, and the Teamwin Logo flashes for a second, then the screen goes back to black, and this process now repeats indefinitely. So to say, I can't enter Recovery or do anything of the sort.
Have I ****ed up or do I have to wait for the phone to discharge completely so I can boot it anew or something?
Press and hold power button and volume up button at the same time (disconnect from charger or pc). Then just use fastboot to repair it the way you want.
Sent from Xperia Z2
Luckily not from an iPhone = Yesterdays technology at tomorrows prices
Is there an .img file I need to use or can I just use flashtool for an FTF? Don't have anything similar to a recovery image that I could flash
Regii said:
Is there an .img file I need to use or can I just use flashtool for an FTF? Don't have anything similar to a recovery image that I could flash
Click to expand...
Click to collapse
No need to be in panic
simply flash any ftf files for your device model numer by using flashtool. Please read properly how to install and use flashtool
http://xperiafirmware.com/8-firmware/51-sony-xperia-z2-d6503
ask for any question

SOLVED - Formatted /system in Philz recovery... wrong leds...

Ok, hi guys... yesterday I misinterpreted some instructions before flashing Rajeev's PureX v4.1 rom... was on Niaboc79's ExistenZ Y v2.6.0... so went on, wiped and factory resetted... then, instead of formatting system/data, I formatted data AND system so obviously now it gets stuck at the Sony logo when booting because it has nothing to boot up and the only way to shut it off is with the small red button on the left side until it vibrates, resets then shuts off...
I then told myself I could simply flash a .FTF back from FlashTool, but alas, not this time... ok, I'm on D6503 Z2 with locked bootloader which is not unlockable... and now, when my phone's off and FlashTool asks to connect phone in flash mode the phone doesn't act as it normally would. when plugging usb cable, instead of the original green led, it quickly shows red, then green then nothing and on flashtool we can now see an error which is shown in the screenshot below.
Drivers are installed and I guess the problem now has to do with the bogus leds as they are the same just trying to connect in flash mode out of FlashTool... I Googled and read a lot about it yesterday on XDA and the only potential answer I could find was telling to flash a .ftf whrough FlashTool which was my first bet anyway but now, I really can't think of anything and would please appreciate your assistance about that... I hate to say this but I must admit what I'm requesting now is some help to get me through my own f*** up, please...
Might be a corrupt .ftf , try downloading another one or build your own with xperifirm+flashtool.
You can also try repairing with sony pc companion app...
Thanks for the quick answer... In fact I tested with 4 different ftfs I know are working... and as I said the problem is with the inability of phone to enter flash mode and its wrong leds when connecting to flash mode; not a software issue... I also tried with PCCompanion but it fails at detecting the phone since it freezes at the Sony logo and doesn't boot anything...
EDIT it also doesn't charge when I plug usb or ac. Instead it quickly toggles leds red, green, none one time and stays off... same way as when I try connecting it to flashmode holding vol-...
I've flashed many sony phones that don't boot / bootloop with flashtool and they always come to life again unless there's hardware problems
You phone is beeing detected in flashtool as beeing in flashmode so it's entering the correct mode. As a last resort i would try flashing on another pc/os , i still think it's pc related... are you using any android emulator on the pc? bluestacks / andy or that kind of stuff?
They cause loader.sin errors too... had that happen once on my work computer, uninstalled bluestacks and flashed fine afterwards.
Sorry i can't think of anything else right now...
I don't have another pc, but I reinstalled a pc backup so it is as when I originally set it up... reinstalled flashtool, reinstalled drivers and launched FlashTool to flash a .FTF. It just did the same as before flashes red, flashes green then nothing but the same errot message in FlashTool... but I noticed one thing, everytime I just plug phone to pc, Flashtool states it's in Flash mode as it is not. it was simply plugged in... and I don't use such as BlueStacks... and anyway the phone's leds react wrongly first then the asked action, flashing, cannot be applied hence the error message in FlashTool... thanx for your help...
I'm really used to flashing stuff and I know my mistake now was to format the system partition. From that time, it became impossible to flash any .ftf and the only info, signal I've got is the led quickly displaying red then green led intead of just green then starting to flash, when cable is plugged in, holding VOL-...
Damn formatting the system partition should not hard-brick your phone bro i've done exactly the same mistake on my also unlockable BL Z2 a long time ago, wiped everything and rebooted the phone without flashing the rom xD phone would only show sony logo (can't remember led status) but it flashed normally and came back to life. maybe you got really really unlucky and your bootloader got messed up somehow :| You already did everything i would have done without success, i'm also out of ideas... but xda is full of great minds, maybe someone else can help you better.
You are absolutely right... I had done the same mistake on my xperia T, a while back, and a simple flash from flashtool had taken care of it... I don'T even come to ask for help, usually... when I mess things up, I have always succeeded in bringing the thing back to life... until now...
thanx a lot for your help.
EDIT: Oh, even worse now... when flashtool is done preparing the FTF to be flashed and asks to plug in phone holding VOL-, I tried just plugging the phone WITHOUT holding any button and it did the exact same error I screenshotted earlier, with same red/green/none scheme... So computer really sonsiders phone to be in flashmode from the moment it's plugged in...
No problem, wish i could help more. It does seem like your phone is stuck on fastboot or flashmode. If you just power on the phone and connect it to pc (no flashtool running) does your pc device manager detect your phone? what device does it detect? If you connect in fastboot mode (vol up + plugin usb cable) what do you see in the device manager? Maybe try completely discharging your phone, leave it powered on for a day or so until the battery dies completely, maybe it'll "reset" to normal mode? Just throwing some ideas now, at least we're keeping the thread alive, maybe someone more expert will look at it too
Why you guys quoting every post? Makes it tedious scrolling on mobile.
@rubiicon59 old habits lol xD i edited my posts and removed the quotes, since no one else is participating in the thread they aren't really needed...
ptmaniac said:
No problem, wish i could help more. It does seem like your phone is stuck on fastboot or flashmode. If you just power on the phone and connect it to pc (no flashtool running) does your pc device manager detect your phone? what device does it detect? If you connect in fastboot mode (vol up + plugin usb cable) what do you see in the device manager? Maybe try completely discharging your phone, leave it powered on for a day or so until the battery dies completely, maybe it'll "reset" to normal mode? Just throwing some ideas now, at least we're keeping the thread alive, maybe someone more expert will look at it too
Click to expand...
Click to collapse
first, sorry for the late answer... ok,,, when I only plug usb cable into phone, it is not detected... However, I can boot into fastboot and then it's detected in device manager as in the screenshot below... But, it does flash red just before turning blue for fastboot... just the same quick red flash as when I plug USB in...
ptmaniac said:
No problem, wish i could help more. It does seem like your phone is stuck on fastboot or flashmode. If you just power on the phone and connect it to pc (no flashtool running) does your pc device manager detect your phone? what device does it detect? If you connect in fastboot mode (vol up + plugin usb cable) what do you see in the device manager? Maybe try completely discharging your phone, leave it powered on for a day or so until the battery dies completely, maybe it'll "reset" to normal mode? Just throwing some ideas now, at least we're keeping the thread alive, maybe someone more expert will look at it too
Click to expand...
Click to collapse
first, sorry for the late answer... ok,,, when I only plug usb cable into phone, it is not detected... However, I can boot into fastboot and then it's detected in device manager as in the screenshot below... But, it does flash red just before turning blue for fastboot... just the same quick red flash as when I plug USB in... it also doesn't charge when plugged in... no orange led... was at about 90% when it stopped working...
Just a quick tip- don't use the red button, it is only for emergency and it is annoying to open the flap everytime. Instead, use the Power + Volup and hold for a few seconds.
WOW! reallly can'T say why it didn't work first time, but I tried reinserting sd card and retake it out, started one last time to flash a .ftf and it worked.... Great, now back on my backup... everything working as it should now....
thanx to @BlAckXpeRia for the reminder tip... Red button should only be used when everything else failed to shut the phone down...
and of course, thanks to @ptmaniac for your help all along these stressful last 2 days... THANKS!!!
oh yeah, SOLVED
Nice!! i really really like this phone, i would be very sad if it died on me like that, good to hear you got your phone back
M having same issue without any SD card, what should I do ? :'(

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