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[SOLVED] HELP! Xperia T does not boot after JB update

I updated my Sony Xperia T to 4.1.2 a few hours ago via PC Companion 2.1. Everything was good until I restarted my phone and it got stuck in the screen with white triangle and blue bar (after the Sony logo). I waited but nothing happens.
I've tried to force restart using power button + volume up (switching off using the power button alone doesn't respond) several times but it still get stuck in the same screen. I was able to repair it using PC companion and SEUS (both were successful) but when I turned on the phone the problem still persists. Restarted several times but to no avail. I cannot use my phone right now.
What seems to be the problem?
My phone is less than a week old, unlocked, stock and not rooted. I will try to flash 4.0.4 back using flashtool coz it was working fine before the JB update.

gabzki said:
I updated my Sony Xperia T to 4.1.2 a few hours ago via PC Companion 2.1. Everything was good until I restarted my phone and it got stuck in the screen with white triangle and blue bar (after the Sony logo). I waited but nothing happens.
I've tried to force restart using power button + volume up (switching off using the power button alone doesn't respond) several times but it still get stuck in the same screen. I was able to repair it using PC companion and SEUS (both were successful) but when I turned on the phone the problem still persists. Restarted several times but to no avail. I cannot use my phone right now.
What seems to be the problem?
My phone is less than a week old, unlocked, stock and not rooted. I will try to flash 4.0.4 back using flashtool coz it was working fine before the JB update.
Click to expand...
Click to collapse
Update: I flashed .233 using flashtool but still the same. Is my phone bricked?

gabzki said:
Update: I flashed .233 using flashtool but still the same. Is my phone bricked?
Click to expand...
Click to collapse
I have read that this process can take some time, flash a rom and give it at least upto 45 minutes, if it is still not working maybe you have a more serious problem.

Re: [Q] HELP! Xperia T does not boot after JB update
Flash a 303 firmware in flashtool instead of pc companion it never gets stuck for me weird some people have these problems
Sent from my LT30p using xda premium

Any news on that? i have exactly the same problem after flashing with PCCompanion.

Re: [Q] HELP! Xperia T does not boot after JB update
segataj said:
Any news on that? i have exactly the same problem after flashing with PCCompanion.
Click to expand...
Click to collapse
Just leave it be, plugged to the charger. I've heard of cases were it too about 3 hours to compete
Did I help? Please press the thanks button
Sent from my Xperia T (LT30P) using XDA premium

Re: [Q] HELP! Xperia T does not boot after JB update
I had this before, when going from 303 to 195.
Flash back the exact last full firmware you had prior to jb, if it was custom use the ftf the Rom is based on, it should boot, reset, then do the update again.
It took 35 mins to complete, I thought it was dead, once you get that screen, do not interrupt it or it can't complete and you need to start again.
Sent from my LT30p using xda app-developers app

OK, I was able to fix it and replicate it once but there's no certainty that it will not happen again once I restart the phone.
Here's what I did...
Since .233 did not work, I tried flashing the older firmware which is .303 - It worked!
I tried flashing .233 again to test if it has something to do with the firmware but it flashed without any problems!
I checked with PC companion to update to 4.1.2 but no update is available (since I used the UK firmware) so I flashed using the ftf file (.489) found here - it successfully flashed to 4.1.2!
HOWEVER, when the phone restarted (after inserting the sim card) and that's when the problem happened again! It stuck on the same screen. That's how I first encountered the problem earlier - the first reboot after updating caused for the phone to get stuck to that screen with white triangle and blue bar.
So I repeated the same process again (flashed .303 but skipped .233) then flashed .489 successfully but I DECIDED NOT TO RESTART THE PHONE this time. I'm not an expert so I don't know what's the cause of this??
My phone is working fine right now. Probably I will try to reboot the phone after 3 days to see if the issue comes back again.

segataj said:
Any news on that? i have exactly the same problem after flashing with PCCompanion.
Click to expand...
Click to collapse
Did the problem occur right after you updated? Or when you rebooted the phone for the first time after the update?
Mine was ok whether I updated via PC Companion or flashtool - the problem only happened when I restarted the phone for the first time after the update. So I tried not to reboot the phone on my third attempt. It's working fine now on 4.1.2. (as long as i don't restart it probably).
You can try the process I explained above and let us know!

gabzki said:
Did the problem occur right after you updated? Or when you rebooted the phone for the first time after the update?
Mine was ok whether I updated via PC Companion or flashtool - the problem only happened when I restarted the phone for the first time after the update. So I tried not to reboot the phone on my third attempt. It's working fine now on 4.1.2. (as long as i don't restart it probably).
You can try the process I explained above and let us know!
Click to expand...
Click to collapse
I've the same problem: https://www.dropbox.com/s/inagohwprijvc31/2013-02-02 10.27.02.jpg
I don't want void warranty... what can I do?

The solution for white triangle is, like DooMLoRD said, formating internal storage

dkownacki said:
The solution for white triangle is, like DooMLoRD said, formating internal storage
Click to expand...
Click to collapse
When more accurate to format the internal card?
Give me step by step if you think you know the cause of the problem.
Thank you in advance.

Fix to get JB Running
I had the exact same problem, a white triangle after flashing the JB update.
Here's how I solved it:
1. Flash a .303 stock firmware
2. Turn on your phone without Sim card and without MicroSD
3. Complete the Setup Guide (just pass the 7 steps).
4. Get Ready to flash the JB update (.489 I think)
5. EXCLUDE BASEBAND BEFORE FLASHING IT
6. It should work now (is working perfectly on my Xperia T since yesterday)
If this helps you, hit the thanks button, I'm trying to build a reputation here

Samper27 said:
I had the exact same problem, a white triangle after flashing the JB update.
Here's how I solved it:
1. Flash a .303 stock firmware
2. Turn on your phone without Sim card and without MicroSD
3. Complete the Setup Guide (just pass the 7 steps).
4. Get Ready to flash the JB update (.489 I think)
5. EXCLUDE BASEBAND BEFORE FLASHING IT
6. It should work now (is working perfectly on my Xperia T since yesterday)
If this helps you, hit the thanks button, I'm trying to build a reputation here
Click to expand...
Click to collapse
I mentioned in my process above that I will wait for 3 days before restarting the phone but I did it anyway to test your process. It didn't work for me.
I followed ALL the steps but after the phone restarted (when sim card was inserted) it got stuck on the same screen again. Have you tried rebooting your phone?
Looks like I'm gonna stay with .233 for now until this gets resolved.

dkownacki said:
The solution for white triangle is, like DooMLoRD said, formating internal storage
Click to expand...
Click to collapse
How do we do that in JB?
I noticed that after I flashed the .303 firmware the phone asks that internal storage be formatted (there's a notification in the notification bar). So I did that. But after updating to 4.1.2 the problem repeats again after the first reboot (stuck in the screen with white triangle).

Sounds like my problem has been solved. :good:
I repeated the process by Samper27 (except that I didn't remove the sim card; I don't have an sd card).
After updating to 4.1.2 I cleared the internal storage via the settings and performed a factory data reset - my phone restarted without any problems. I could switch it on and off now without getting stuck in that screen.

Great!
gabzki said:
Sounds like my problem has been solved. :good:
I repeated the process by Samper27 (except that I didn't remove the sim card; I don't have an sd card).
After updating to 4.1.2 I cleared the internal storage via the settings and performed a factory data reset - my phone restarted with any problems. I could switch it on and off now without getting stuck in that screen.
Click to expand...
Click to collapse
Glad to hear that! I don't know the change with the SIM Card, for my it worked like that and I have turned off and on several times. After doing that I lost my APN configuration but a quick google search and BAM, everything working smooth and battery life is a little better than before.
You should update the post to let everyone know that the problem is solved
If this helps you, hit the thanks button, I'm trying to build a reputation here

Samper27 said:
Glad to hear that! I don't know the change with the SIM Card, for my it worked like that and I have turned off and on several times. After doing that I lost my APN configuration but a quick google search and BAM, everything working smooth and battery life is a little better than before.
You should update the post to let everyone know that the problem is solved
If this helps you, hit the thanks button, I'm trying to build a reputation here
Click to expand...
Click to collapse
Yup, I just updated the thread title.

gabzki said:
Sounds like my problem has been solved. :good:
I repeated the process by Samper27 (except that I didn't remove the sim card; I don't have an sd card).
After updating to 4.1.2 I cleared the internal storage via the settings and performed a factory data reset - my phone restarted without any problems. I could switch it on and off now without getting stuck in that screen.
Click to expand...
Click to collapse
I have the same problem with this white triangle. The only firmware where the phone starts is .303. All other firmware doesn' start anymore.
I tried the process by Samper27, but it doesn't work for me. Could you please tell me which firmware of .303 and JB 4.1.2 you used? And what do you mean with factory data reset (Hold down the power button and volume up for 10 sec?)
Thanks

Even I gotta same problem. But my phone's screen is now blank, no LED no warning Triangles

Bootloop, no CWM, no Flashtool = Z Lost ?

Hello dear Community,
the prehistory ... about 2 weeks ago I get rid of my S2 and switched to the Xperia Z and I`am completely satisfied.
Because of my pre-"experience" with the S2, various Customrom's, Root and CMW I chose this day for these steps in the Xperia Z .
Got this in the course of the day and I Rooted the Phone and installed the latest CWM Recovery (bootloader locked). So far everything is working fine right after installation, I done a backup of my current StockFirmeware, if something goes wrong to have a backup ready.
After the Backup I Flashed this ROM
[ROM] [XZ] [07/03] Xperia KA02.2 Z Revolution ™ |
... via CWM, before the installation of course I wiped the Z, that nothing can go wrong ... I thought (backup?) ... The installation went smoothly, rebooted from the recovery and all i got was a .... Bootloop.
And here I am hanging tight since noon today.
Phone starts ... xperia logo appears, restart ... xperia logo appears, restart etc, etc. I thought I might still'm coming back into CWM, but None, no green LED on boot, if this is so, one should press on to the Volume + button to get into CWM ... doing nothing but looping again and again.
So i waited all day long until the battery was empty. After that i connected the Phone for hour to the charger. After an hour of loading time i tried to turn the phone back on ... But still no green LED .... Bootloop continue.
So i let the battery empty iself again. This time I connected the Phone via USB without switching on. Started the Sony Flashtool pressed the Volume- key and the Xperia connected to the Software, but due the Locked Bootloader i can´t to nothing.
That´s what i have been tried to bring this thing back to Life ...
Hope that anybody can help me get rid of this Silly situation
and BTW: SORRY FOR MY BAD ENGLISH !!!

julianoo said:
Hello dear Community,
the prehistory ... about 2 weeks ago I get rid of my S2 and switched to the Xperia Z and I`am completely satisfied.
Because of my pre-"experience" with the S2, various Customrom's, Root and CMW I chose this day for these steps in the Xperia Z .
Got this in the course of the day and I Rooted the Phone and installed the latest CWM Recovery (bootloader locked). So far everything is working fine right after installation, I done a backup of my current StockFirmeware, if something goes wrong to have a backup ready.
After the Backup I Flashed this ROM
[ROM] [XZ] [07/03] Xperia KA02.2 Z Revolution ™ |
... via CWM, before the installation of course I wiped the Z, that nothing can go wrong ... I thought (backup?) ... The installation went smoothly, rebooted from the recovery and all i got was a .... Bootloop.
And here I am hanging tight since noon today.
Phone starts ... xperia logo appears, restart ... xperia logo appears, restart etc, etc. I thought I might still'm coming back into CWM, but None, no green LED on boot, if this is so, one should press on to the Volume + button to get into CWM ... doing nothing but looping again and again.
So i waited all day long until the battery was empty. After that i connected the Phone for hour to the charger. After an hour of loading time i tried to turn the phone back on ... But still no green LED .... Bootloop continue.
So i let the battery empty iself again. This time I connected the Phone via USB without switching on. Started the Sony Flashtool pressed the Volume- key and the Xperia connected to the Software, but due the Locked Bootloader i can´t to nothing.
That´s what i have been tried to bring this thing back to Life ...
Hope that anybody can help me get rid of this Silly situation
and BTW: SORRY FOR MY BAD ENGLISH !!!
Click to expand...
Click to collapse
You can try Sony Update Service.

Thank´s for your fast reply,
git my Problem solved
Wrong version of Flashtool was installed, so i downloadet the beta2 out of the Forum and now .... my Phone is back Alife

For those who have the same issue, try too re-flash the firmware following the procedure below :
1/ Follow the procedure for flashtool
Tick erase data if it still does not work
2/ Wait for flashtool to tell you to conned your Xperia Z
When it does get ready to connect it (step 3)
3/ Wait for you bootloop cycle end
--> Wait for the screen to turn black
--> Once it's black press and hold volume down
--> Connect your Xperia Z to PC
Step 3 must be done really quickly before the bootloop cycle restarts.
Hope this helps !
if it does press thanks button

Thank u
I did this procedure and it worked
My xperia z connected to pc in flashmode in step 3
And i flashed kernel and rom after that
Thank u very much

[Q] Brick/Frozen/Loop after failed to downgrade ICS from JB using flashtool

Hi guys, I'm having a problem like title stated.
This morning, I used flashtool to flash an ICS stock rom to my Xperia TX running JB.
Everything were good until end of installation. When I finished flashing, I tried to boot up
my phone, but it kept repeating to show:
SONY logo > A triangle with "!" inside, there's a phone icon beside it > off
I had searched all over the internet whole day but without a clue.
Flashtool is not helping as well, whenever I plug in and wanted to flash again, the same thing just
happened over and over again.
Please help me before I need to send it for someone to fix it.
Thank you in advanced!

Just leave it for a while, it will eventually boot up
It could take a few hours
I have had that problem, I just left it over night and it was fine

[Q] Serious problem, auto shutdown

i am currently using the Xperia Z LTE with version .244, LOCKED BOOTLOADER.
After HEAVY flashing with the previous Z1 camera ports and the existanZ roms, my phone shut down randomly. Its getting more shut downs recently, the screen Just blacked and i need to turn on the phone again. I even have problem starting up, example it shuts down immediately during booting up, sometimes during normal usages. I have tried re flashing using flash tool , erasing everything flashing a new firmware, still no luck, using PC companion to repair. I even try NOT to root it, but it still shutdowns, only way to prevent it was to PLUG IN THE POWER WHILE USING.. no shut downs then. After unpluging, the shutdown come back. Anyone has this issue too? Any help?

Maybe your battery is mostly empty, or gets recognized as empty.
This could help you:
Let the phone charge for 24h while it's on. Then flash Stock Rom with PCC or FT.
Sent from my Dualbooted XZ

Tried but still no luck, anyone any more ideas?

finoqq84 said:
i am currently using the Xperia Z LTE with version .244, LOCKED BOOTLOADER.
After HEAVY flashing with the previous Z1 camera ports and the existanZ roms, my phone shut down randomly. Its getting more shut downs recently, the screen Just blacked and i need to turn on the phone again. I even have problem starting up, example it shuts down immediately during booting up, sometimes during normal usages. I have tried re flashing using flash tool , erasing everything flashing a new firmware, still no luck, using PC companion to repair. I even try NOT to root it, but it still shutdowns, only way to prevent it was to PLUG IN THE POWER WHILE USING.. no shut downs then. After unpluging, the shutdown come back. Anyone has this issue too? Any help?
Click to expand...
Click to collapse
battery or the battery circuit problem.
first try with replacing the battery.

Z1 Couldn't boot even though flashed by flashtool and emma

Hi,i'm sabing my z1 by many ways,include flashtool,xperia companion and emma.
i've flash my device my flashtool for many times,after flashing flashtool didn't response any error,but my device still cant boot up.it didnt show any screen,and i couldnt check led status(i broke its cable)
xperia companion just told me UEGetPhoneInfoMissingInfo and i couldnt go to next step.
sony emma also tell me my device is flashed,but after that my device still in black screen and without any responses.
could anyone help me?sor for my bad eng.:crying:

Does the device atleast try to boot? does it show logos or just complete blackness from the point you turn it on?
if it's complete blackness you might have some screen connector issues, I guess, that's what id trouble shoot. if it does try to boot, be sure youre flashing the right firmware, double check or even re-download the firmware from xperi-firm. It may also be decrypted the wrong way, sometimes it messes up the installation process.

did it vibrate when you hold the power button?

I also had same problem, after flashed stock fw using flashtool got bootloop. The problem started when i changed from lolipop to nougat using custom rom, all is well, last thing i did was root phone with magisk but after i decided to go back to lollipop, flash lollipop cusrom rom in twrp, got bootloop then tried flashing stock using flashtool still bootloop, no sony logo just black screen but when i flashed back to nougat custom rom using twrp it booted. Is there something needed to do in case wanted to go back to fresh stock rom?

tips,
dont too often changging rom/wiping/formating/flashing firmware
coz it will highly decrease emmc life