Xperia Z (C6602) not boot up Restart Constantly - Xperia Z Q&A, Help & Troubleshooting

hello
Suddenly my xperia Z turn off and i tried to switch on again but only sony logo come and shut off
and i put on charger (Wall) then sony logo come and off again logo come and off
i flash framework via flash tool but after successfully flashed but still same problem
please hep me....

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[Q] Xperia Z reboots at Sony logo

i tried to update my xperia Z to 4.2.2 , in the beginning it worked but the system got unstable and started crashing , loosing signal or just turning off and not going back on until connected to the charger , so i flashed another stock rom and then it wont boot the system it would pass the sony logo and the xperia logo but reboots when the color strings start going across the screen so i tried these ways :
relocked the boot loader and uses sus and pc companion to reflash ( caused the phone to restart as soon as it turned on at the sony logo )
i tried unlocking the boot loader and flash another stock rom ( it flash but same problem )
i tried to flash boot.img from the rooting kit using fast boot and the same problem continues
now the phone turns on but it restarts at the sony logo so i guess the boot files are corrupted is there away to solve it ?
i have tried different Stock Roms to flash but nothing is working. need help
Xperia Z reboots at Sony logo

(PLEASE READ.....URGENT) Xperia TX doesn't turn on after 4.3 update.....

My Xperia TX wont turn on after android 4.3 update.
The phone worked perfectly for one day after the update but it wont turn on now.
The phone stucks on the screen which comes after the SONY logo and the XPERIA logo,the screen on which different colours come and flow away.
what do i do ?
Your going to have to reinstall the update with repair option on a computer.
nafayazhar said:
My Xperia TX wont turn on after android 4.3 update.
The phone worked perfectly for one day after the update but it wont turn on now.
The phone stucks on the screen which comes after the SONY logo and the XPERIA logo,the screen on which different colours come and flow away.
what do i do ?
Click to expand...
Click to collapse
As soon as the XPERIA logo disappears, keep "Vol down" pressed until it boots into Safe Mode. If it does, then it might be that you installed some app that is not allowing it to boot. If it still doesn't boot, and if you have a recovery, you can wipe /cache, else you'll have to do what was suggested in the previous post.

Xperia Z reboot loop, sometimes weird lines, cant get out!!! Help!!

I have my Xperia Z C6603 with Indian lollipop flashed. One day I told my sis to plug my phone to charger and I dont know what she doid, I think she pressed the power key and the phone rebooted. After a while when I checked my phone it had only black screen, no touch nothing was working. I force rebooted the phone and then it got stuck in boot loop. Then I had the Indian Kitkat firmware downloaded from here >>[FTF][4.4.4] Xperia Z (C6603) 10.5.1.A.0.283 Generic IN (India) - UPDATED<<. Flashing it that time gave me error because drivers were not installed, I installed drivers and then I flashed it, flashed successfully and then I started it, at the choice of Language, when I touched it, the screen went black smoothly and then nothing happened. I force rebooted it. Then I done a software repair from Sony's PC companion. I had lollipop then, it started and after powered by android logo, it went black smoothly and then nothing. Then I tried to flash the kitkat firmware again thinking that it might went bad that time. And now it again stuck in boot loop. At the language select, it went black smoothly and reboots. Please Help!!!
Rocking Durgesh said:
I have my Xperia Z C6603 with Indian lollipop flashed. One day I told my sis to plug my phone to charger and I dont know what she doid, I think she pressed the power key and the phone rebooted. After a while when I checked my phone it had only black screen, no touch nothing was working. I force rebooted the phone and then it got stuck in boot loop. Then I had the Indian Kitkat firmware downloaded from here >>[FTF][4.4.4] Xperia Z (C6603) 10.5.1.A.0.283 Generic IN (India) - UPDATED<<. Flashing it that time gave me error because drivers were not installed, I installed drivers and then I flashed it, flashed successfully and then I started it, at the choice of Language, when I touched it, the screen went black smoothly and then nothing happened. I force rebooted it. Then I done a software repair from Sony's PC companion. I had lollipop then, it started and after powered by android logo, it went black smoothly and then nothing. Then I tried to flash the kitkat firmware again thinking that it might went bad that time. And now it again stuck in boot loop. At the language select, it went black smoothly and reboots. Please Help!!!
Click to expand...
Click to collapse
seems to be a hardware problem, maybe it got hit somehow... ?_?

xperia z eteint

my xperia z starts displays the sony logo and then stops I try to repairs it with sony companion and flashtools. the flash succeed but
then it's the same thing displays "sony" and then stops

Z3 compact boot loop problem

Hi guys
I have problem with z3 compact d5803 , i send any desk app from xz1 to z3 compact , when i installed it , my phone restart and fall in boot loop with Sony logo for ever , i used flash tool to flash it , ues all original 3 framware 5 ,5.1 , 6 , boot loop problem still , i try all ways to get recovery mode and get nothing , i opened phone back and disconnected battery and reconnected it, i used sony companion and tell me your phone is locked ,please need help , can i find another program to flash it , or anther way to fix my phone
Need help,
Xperia z3 compact boot loop "sony logo" can be fix?
shadyhoo said:
Need help,
Xperia z3 compact boot loop "sony logo" can be fix?
Click to expand...
Click to collapse
Hi, i had the same problem of bootloop. Try to flash with flashtool and recovery phone with Sony app but didn't work. Now i change battery and phone finally works! Maybe it works for you.

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