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[HELP] :( Xperia Z C6602 won't turn on - Flashes 3 times a red light

Help, First time flashing a ROM on a Sony phone. I have experience flashing, unlocking bootloaders and rooting, etc... but I normally do this on my Samsung phones.
So... This is what happened. I recently tried to change my Sister's Xperia Z (C6602) ROM so I could try if I could get 4k video out of its incredible camera. But I didn't have any knowledge on how it is done on a Sony phone. I researched on various sites how it is done.
First I saw NUT's dual Recovery and I downloaded it so I could get Recovery on the phone. I downloaded it and I tried using the third option which includes rooting. But I couldn't get it to work. It seemed like it couldn't root the phone properly. So I tried using vRoot (failed), tried an utility that I found while researching and I got it to root. Went back to NUT's dual recovery, installed Recovery, everything wen't excellent to this point. Sister didn't made backup so I couldn't flash the ROM yet.
Researched how to Unlock the Bootloader, saw that Sony let developers unlock the bootloader and I did it using fastboot and the code from Sony, the wrong part is that I didn't backup the TA Partition (Had TA Backup utility XDA site open on chrome but didn't use it since I thought nothing would go wrong if I didn't make a backup of the TA partition) and yes I lost the DRM keys... After this I found out that loosing DRM keys means no Bravia Engine, Music ID, etc... (I hate you SONY )
After loosing DRM keys, I was worried that my sister would kill me, so I searched trough XDA and found that you could get some functionality back from recovering the TA partition and flashing a zip from jimRnor but I needed to flash 10.5.A.0.230 ftf using flashtool. So I did it. relocked bootloader, flashed 10.5.A.0.230, booted to 10.5.A.0.230, turned off the phone, unlocked bootloader using flashtool, used recovery to flash the zip, and done.
So this is the part where I made the phone not work... (And I deleted some of my sister's photos because unlocked bootloader without backing up woopsies)
Sorry for the long story...
Wen't to recovery, tried to flash iHackers v5.2 but somehow the file didn't downloaded correctly, got some errors during installation and I turned off the phone to go check what happened that I couldn't get the zip to flash. And by turning off the phone. It somehow got corrupted or something and now the phone won't turn back on. It stayed with the LED on red. I found it strange so I pressed Power + VolUp for like 5 seconds and it turned off, and then I tried turning it on again and nothing happened. Tried different combinations and nothing would happen. lastly I tried using Power + VolUp + VolDown for 20 seconds and now it is flashing 3 times a red light on the LED. and this is how it has been for a while.
So please, has anyone had any experience with this type of problem, what should I do and what I need to learn for the next time.
P.D. Yes, I didn't know that Flashtool could do everything from rooting, backing up TA partition, unlocking/locking bootloader. I found out after I had some time using the utility.
P.D. I can't get access to neither flash mode or fastboot mode, PC won't recognize the phone.

NgZeng said:
Help, First time flashing a ROM on a Sony phone. I have experience flashing, unlocking bootloaders and rooting, etc... but I normally do this on my Samsung phones.
So... This is what happened. I recently tried to change my Sister's Xperia Z (C6602) ROM so I could try if I could get 4k video out of its incredible camera. But I didn't have any knowledge on how it is done on a Sony phone. I researched on various sites how it is done.
First I saw NUT's dual Recovery and I downloaded it so I could get Recovery on the phone. I downloaded it and I tried using the third option which includes rooting. But I couldn't get it to work. It seemed like it couldn't root the phone properly. So I tried using vRoot (failed), tried an utility that I found while researching and I got it to root. Went back to NUT's dual recovery, installed Recovery, everything wen't excellent to this point. Sister didn't made backup so I couldn't flash the ROM yet.
Researched how to Unlock the Bootloader, saw that Sony let developers unlock the bootloader and I did it using fastboot and the code from Sony, the wrong part is that I didn't backup the TA Partition (Had TA Backup utility XDA site open on chrome but didn't use it since I thought nothing would go wrong if I didn't make a backup of the TA partition) and yes I lost the DRM keys... After this I found out that loosing DRM keys means no Bravia Engine, Music ID, etc... (I hate you SONY )
After loosing DRM keys, I was worried that my sister would kill me, so I searched trough XDA and found that you could get some functionality back from recovering the TA partition and flashing a zip from jimRnor but I needed to flash 10.5.A.0.230 ftf using flashtool. So I did it. relocked bootloader, flashed 10.5.A.0.230, booted to 10.5.A.0.230, turned off the phone, unlocked bootloader using flashtool, used recovery to flash the zip, and done.
So this is the part where I made the phone not work... (And I deleted some of my sister's photos because unlocked bootloader without backing up woopsies)
Sorry for the long story...
Wen't to recovery, tried to flash iHackers v5.2 but somehow the file didn't downloaded correctly, got some errors during installation and I turned off the phone to go check what happened that I couldn't get the zip to flash. And by turning off the phone. It somehow got corrupted or something and now the phone won't turn back on. It stayed with the LED on red. I found it strange so I pressed Power + VolUp for like 5 seconds and it turned off, and then I tried turning it on again and nothing happened. Tried different combinations and nothing would happen. lastly I tried using Power + VolUp + VolDown for 20 seconds and now it is flashing 3 times a red light on the LED. and this is how it has been for a while.
So please, has anyone had any experience with this type of problem, what should I do and what I need to learn for the next time.
P.D. Yes, I didn't know that Flashtool could do everything from rooting, backing up TA partition, unlocking/locking bootloader. I found out after I had some time using the utility.
P.D. I can't get access to neither flash mode or fastboot mode, PC won't recognize the phone.
Click to expand...
Click to collapse
your phone is xperia Z this forum is for xperia z1, firmwares are diff my have a chance to brick ur device i think, better to go ahead on xperia Z forum and find stock ftf and flash.

mizukage said:
your phone is xperia Z this forum is for xperia z1, firmwares are diff my have a chance to brick ur device i think, better to go ahead on xperia Z forum and find stock ftf and flash.
Click to expand...
Click to collapse
Hahaha woops, wrong forum, going back to Xperia Z forum :cyclops:
And Btw I can't flash anything phone won't even boot to Flash mode...

XZ in continious bootloop, no matter what i flash/do

Hi guys,
Device info:
Model C6603, Unlocked bootloader
So i have the following problem, my device is in a bootloop and i can't figure out what the exact issue is. I'm out of options at least.
First a little background on how it came to be: (scroll down for short overview)
Before official lolipop came out I've been on CM12.1 for a few months, cm-12-20141221-INFECTED-yuga to be exact. When official lolipop came out I installed C6603_10.6.A.0.454_Customized_HK-Rooted+Xposed Modules for LB following the instructions, although i see the thread has been modified (name, updated etc.) the instructions are the same. I did not install Xposed yet, because i wanted to try stock+root first.
After a few weeks of normal use, i used google maps navigation. This worked fine but when i arrived at my destination and picked up my phone closed google maps app but then my phone crashed. It rebooted to the point where i had to enter my pincode, but every time i was entering my pin it crashed and after a few tries it dind't even got to the lock screen but only showed the sony logo and rebooted(bootloop). I noticed my device was getting hot and left it alone for a few minutes, after that i started my phone again and was able to use my phone again. Until I started google maps again for the way back and enabled gps it crashed again, the same thing happened the phone would reboot when entering my pin, the phone wasn't hot this time. I left the phone alone till i got home, put it on the charger and the next day my phone worked fine again.
A few days later i was outside in the sun whatsapping, when the same happened my phone crashed and rebooted when entering the pin or slightly after. The phone was feeling hot, also because it was exposed to the sun for a while, in TWRP recovery it showed temperatures around 70 degrees celsius (i don't know if this is too hot?). After i had left the device alone for a while and try to boot it up it got stuck in a bootloop (sony logo), after a night of charging it got to the point of entering the pin code again but crashed and got stuck in a bootloop again (sony logo). And since then i'm not able to get rid of this bootloop. However i could still get into recovery (TWRP).
First i tried to reinstall the rom, factory reset and flash via recovery: C6603_10.6.A.0.454_Customized_HK-Rooted+Xposed Modules for LB
This worked, and the device booted up but after a while it crashed and got stuck in a bootloop again (sony logo).
So all summed up:
cm-12-20141221-INFECTED-yuga
>> C6603_10.6.A.0.454_Customized_HK-Rooted+Xposed Modules for LB
>> Google maps navigation >> overheated >> bootloop (sony logo) >> charging night >> working >> whatsapping in bright sun >> overheating >> continuous bootloop (sony logo)
What i have tried:
- Tried booting without sim card, withoud sd but doesn't work
- Flash same rom via recovery C6603_10.6.A.0.454_Customized_HK-Rooted+Xposed Modules for LB : Worked once, but then crashed and went back in bootloop, now when i flash this only Bootloop (sony logo)
- Flash updated version of http://forum.xda-developers.com/xperia-z/help/lollipop-5-0-2-10-6-0-454-pre-rooted-t3116205 via recovery : Bootloop (sony logo)
- Flash kernel via fastboot http://forum.xda-developers.com/xperia-z/development/kernel-unlocked-bootloaders-t3114234 : Only recovery works
- Flash stock kernel via fastboot: boot (sony logo) one time then turns off
- Flash stock lolipop (with and without bootloader unlocked) via latest Flashtool : Bootloop (sony logo)
- Flash stock lolipop via xperifirm (C6603_10.6.A.0.454_KPN Mobile NL) xperia (with and without bootloader unlocked) via latest Flashtool : Bootloop (sony logo)
- Flash stock kitkat (with and without bootloader unlocked) via Flashtool: Bootloop (sony logo)
- Relock bootloader and Sony PC companion restore latest firmware : Bootloop (sony logo)
- Restoring serveral backups from TRWP and Phillz touch but they all result in the same bootloop, while at the time the backups were made there were no problems.
I'm pretty much out of options and begin to thinking something was damaged when the device overheated or a bad partion of a kernel is still stuck in the devices kernel.
Does anyone had the same issue, if so how to fix it? Or another option i could try, maybe someone spotted anything i did wrong?
Current state:
Locked bootloader, stock lolipop 10.6.A.0.454 flashed via Sony PC Companion recovery
Boots into setup, after a few reboots I completed the setup. But still randomly reboots when trying to use some apps or in general leaving it in standby for a while (might be due instability).
Thanks in advantage,
Jonathan

So the only things that you do that do not result in a bootloop are flashing a kernel. Try flashing a Stock kernel with Flashtool --> open flashtool >choose the flash button at the top left > flashmode > choose the firmware > check cache and data above and below check Only Kernel. Post result here...
Good luck

Try flashing a Stock kernel with Flashtool --> open flashtool >choose the flash button at the top left > flashmode > choose the firmware > check cache and data above and below check Only Kernel.
Click to expand...
Click to collapse
Don't do this. It will wipe your data and flash everything but the kernel, therefore losing root etc.
If you want to flash a stock kernel, you must leave everything in the "Wipe" section unchecked, and check everything but "Kernel" in the "Exclude" section.
I don't think this will help anyway, being that you're already on a stock firmware flashed via Flashtool.

aaronkatrini said:
So the only things that you do that do not result in a bootloop are flashing a kernel. Try flashing a Stock kernel with Flashtool --> open flashtool >choose the flash button at the top left > flashmode > choose the firmware > check cache and data above and below check Only Kernel. Post result here...
Good luck
Click to expand...
Click to collapse
Thanks for your fast reply, I think you meant: check everything but leave kernel unchecked (as kingvortex replied at the time of writing)? Since it is an 'Exclude' list. I flashed stock kernel, it shows the Sony logo and then shuts down. I used stock lolipop kernel from 'C6603_10.6.A.0.454_KPN' Mobile NL, and i also tried 'C6603_10.6.A.0.454_Customized CE1'. both have the same result.
I've got the most "life" after i restored my phone with pc companion to 10.6.A.0.454. Then, after being charged via the wall charger for a while, it boots up normally and goes into setup, since it is a complete restore. But crashed around the setup screen for wifi. The other options i tried do not come any further than showing the Sony logo, this stock one shows Sony logo >> android logo >> boot animation + sound.

I'm thinking it might be a case of a dead battery or battery controller of some sort. Because the phone only boots up normally, with stock android .454, when the phone is connected to the wall charger. Whenever i pull out the cable the phone crashes and reboots, also when not connected to the charger it gets stuck in a bootloop. However when the phone is connected to a charger and working for a while it still randomly crashes when using the device, sometimes these moments are suspicious because it sometimes reboots when enabling gps, wifi, mobile data or when starting an app, phone call or synchronizing accounts for instance. On a side note sometimes the battery percentage drops about 6-9 percent when rebooted one time or when crashed, also when i connect my phone to the charger the status led is red but when done showing the sony logo and when charging it turns green (or yellow, depends on battery percentage). This is why i think something internal is not working properly whether it is the battery or the battery controller, i don't know.
I still find it weird that the phone was in perfect condition before flashing .454 stock lolipop, it might be due to overheating that some components where damaged. At least i'm guessing this is the case because i know no other reason why it would show such behavior. Is there someone who has experienced something like this or another solution i might try?

In the mean time i bought a Z3, my XZ is definitely dead now after the battery has discharged and i can't charge it because it's constantly rebooting. However flashmode and fastboot are still working. Thanks for the replies. I might repair my XZ if i can get my hands on a cheap (broken) second hand and replace the internals, but i'll see.

Hi, i have the same problem... i cant charge and the constantly rebooting... and in my case also... when i try to flash any ROM, flashtool and Fastboot are stuck for 1 hour when try to flash system.sin (system.img)
i stop flashing after 1 hour... not sure if could finish after 2 hours :/
Cant use PC Companion because dont have charge in the phone (locked bootloader)
Any suggestion?

C9603 Bootloop after using Flashtool

I'll try to give as much information as I can here.
I wanted to downgrade Android from 5.1.1 to 4.4 as Lollipop in general was giving me so many issues it was making my phone unusable. So I looked up as much as I could, downloaded the latest Flashtool and the 14.4.A.0.108 Central European 1 version of KitKat.
During the flashing process I did not select a wipe of userdata as I wanted to see if I could keep what was on my phone without having to do so. I also checked the box to wipe applogs, as I wasn't sure what that was and 'what was the harm?' I thought. I couldn't find anything about what that actually was, so I don't know.
Now it is stuck in a boot loop, but thankfully phone can be turned off. Flashtool is giving me an error when I try to flash it again, so all further details are below. This was my first time using Flashtools and doing anything of this kind, so please try to be nice. Thank you.
- Customisation Version 1276-4318_R2D (Not sure if this is relevant)
- Able to enter Flash Mode and Fastboot
- No recovery mode, Stock ROM with developer options but I think it has a locked bootloader (not really sure what this means)
- No SD card, but I backed up what I wanted to keep on the PC.
- All drivers for phone are up to date on computer, but Sony PC Companion (including repair mode) requires phone to be on and connected I believe.
- I tried to flash it again but this time wiping everything, except Flashtool gives error of 'Processing of loader.sin finished with errors' and then aborts the flashing process.
EDIT: Finally successfully flashed 4.4 to the phone.
Now I have a couple of new problems.
1. The screen keeps randomly clicking/moving itself.
2. My back/home/etc buttons at the bottom of the screen still aren't responding quickly, and I get quite a bit of lag using them.

it is due to dirty flash, I guess, reflash with wiping selected and it should be OK

Sony Xperia SP stuck on Sony logo screen, can't open recovery, flashtool also fails

Having gotten a spare Xperia SP, I decided to venture into the realm of flashing custom ROMs. This was the first time I did anything of this sort with an Android device. So, here is what I did to it today:
At first, I successfully rooted, installed recovery and flashed CM12. After fiddling with it for about an hour and not finding anything super exciting, I decided to try out other ROMs. I did a facotry reset, wiped the data and cache, and was about to flash CM11 (I forgot that it required an unlocked bootloader, which I don't have, and the recovery console told me so). Maybe at this point I should have just reflashed CM12, but I chose (not even sure why at this point) to exit recovery instead. After this, the phone keeps getting stuck on the Sony logo (although on the second attempt to turn it on, it did display a screen showing that wrench icon, indicating some sort of configuration activity going on, but never moved past that either). I tried flashing two different stock ftf roms with flashtool, both fail with this error: Processing of system.sin finished with errors. One of them will cause the phone to shut off after about a minute on the logo instead of remaining stuck on it indefinitely.
Maybe I should mention that this phone did not exactly work flawlessly for some time, even before I started experimenting with it. Here are the main things that I can remember it doing:
-Lags on even the basic functions, apps often crashing, despite doing a very recent hard reset.
-Battery drains very fast sometimes (like going from 55% to 0 in about 2 hours with almost no usage).
-A few months ago, it would periodically freeze and reboot itself, but that problem seemed to disappear with time.
Did I do something stupid to that phone, or are there internal/hardware problems that have manifested themselves in this way? I won't be horribly upset if I killed it (after all, knowing that something of this sort may happen was exactly the reason why I was not doing all this on my main phone), but I certainly would like to get it back up and running.

Download Flashtool v0.9.18.6 from official site.
Option 1: Flash stock.
or,
Option 2: Flash tangerine-7.1.elf via 'fastboot mode' to directly get TWRP, then flash any ROM you want.
https://dl.cubeserver.eu/TechnoSparks/tangerine-stuffs/tangerine-7.1.elf

nandan21 said:
Download Flashtool v0.9.18.6 from official site.
Option 1: Flash stock.
or,
Option 2: Flash tangerine-7.1.elf via 'fastboot mode' to directly get TWRP, then flash any ROM you want.
]
Click to expand...
Click to collapse
Thank you for your reply. I have a few questions:
I downloaded the flashtool version that you mentioned (from the official site), but avast detected malware in it. Should version 9.19.8, the one I tried yesterday, work fine?
What is exactly considered "stock rom"? Is it exclusively the version your phone came with, or is it firmware of any version/carrier branding, as longs as it is made for your phone model by the manufacuter?
It looks like my phone actually won't stay in flash mode. I select fastboot mode in flashtool, a window pops up asking me to plug in the phone. I press the volume down button and plug it in, the LED glows bright green, but nothing happens in flashtool. After a few seconds, the LED goes red and the Sony logo appears on the phones screen (as if it was going to turn on), and my computer makes a sound as if the phone was ejected. The phone shuts off a minute later, goes into flash mode again, and the cycle repeats.

UPDATE
Nevermind everything I wrote before, I was able to successfully re-flash stock. Turns out I did in fact have some crappy version of flashtool that didn't work, and I found anolder version without malware.
Strangely, the infected flashtool version was the one I dowloaded from the official site... Something is fishy here.
Anyways, thanks a bunch for your help!

MrDroid15 said:
Thank you for your reply. I have a few questions:
I downloaded the flashtool version that you mentioned (from the official site), but avast detected malware in it. Should version 9.19.8, the one I tried yesterday, work fine?
What is exactly considered "stock rom"? Is it exclusively the version your phone came with, or is it firmware of any version/carrier branding, as longs as it is made for your phone model by the manufacuter?
It looks like my phone actually won't stay in flash mode. I select fastboot mode in flashtool, a window pops up asking me to plug in the phone. I press the volume down button and plug it in, the LED glows bright green, but nothing happens in flashtool. After a few seconds, the LED goes red and the Sony logo appears on the phones screen (as if it was going to turn on), and my computer makes a sound as if the phone was ejected. The phone shuts off a minute later, goes into flash mode again, and the cycle repeats.
Click to expand...
Click to collapse
Use flashtool 0.9.19.8 because that is what everyone is recommending now, Stock rom defines as what it originally comes from your phone which is manufactured by sony. To get into fastboot mode turn off your phone by taking off the cover off your xperia sp and use a pin or pen to press into a small dot and you will get 3 vibrations.
This guide is not written by me, so give credit to chris10286
Step 1. Download a kernel with twrp embedded im sure I used dooms kernel as far as I remember. There are many others just do a simple google of xperia sp kernel with recovery.
Step 2 . take phone case off the back hold button in on lower bottom for 10 seconds you will get 3 vibrations . good leave it at that.
Step 4 . open flashtool let it load completely. Now plug USB into your phone also have it into your PC ! Whilst plugging in hold down volume button to enter flashmode your phone should be green . hold up for fast boot mode which is blue either too let's you flash a kernel but fast boot mode requires "elf" kernel.
Step 5. Locate kernel install and then boot phone up whilst press the volume up button as its booting recovery mode will be accessed now flash rom of your choice or use Sony PC suite to go back to stock. Make sure you have stock kernel and bootloader locked or else it won't let you..
Use this thread to help you since i had the similar problem which involved my phone: http://forum.xda-developers.com/showthread.php?p=63660062#post63660062
If none of my methods work please ask zenith to help you or ask anyone in the xperia sp forum to help you since im not a developer but ran into a similar problem to yours.
I hope this helps you out in someway as it did me good luck.
Thanks Nandan

Thank you, I very much appreciate that you took the time to write this long post to help me out. As I mentioned in an earlier post, I found a solution to my problem - by using flashtool 9.18.6 (the one that wasn't working was actually newer).

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