[Xperia Z Q&A, Help & Troubleshooting] lalilaloe:
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://xdaforums.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://xdaforums.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