Recovering all data from Xperia Z2 stuck in reboot loop

Hi there.

I updated my phone the other day and it ended up doing reboots with an error message regarding the update process. Before I hand it in for service, I wanted to make a copy of all the contents of the device..

So far, it looks like using some recovery kernel image and ramdisk is the right way to go, using "fastboot boot". What's a good image to use?

It's important that nothing is changed on the phone so I for example void the warranty.

Thanks,

Morten

Broke it... CWP boot loop

Hello, my tablet seems to be stuck in a boot loop and i've tried flashing the recovery and supersu again to no avail. I've also tried that exitrecovery zip floating around. I think I might have flashed a kernel by accident want trying to root.

Background
Tried using WinDroid Universal Android ToolKit. <- was successful in unlocking bootloader only. tried various times to install twrp but nothing would happen. The "recovery mode" in BL would just show android with caution triangle. I then used WinDroid's "commands" section to try and flash recovery. I may have flashed kernel instead? I have CWM 6.0.5.0. Help would be appreciated. This is what i get for trying to take the easy way out -_-

Boot Loop Problem persists after installing Lollipop ROM & clean install

I was using the Blekota Note 4(based on Kitkat) on my i9300 when it one day suddenly it restarted on its own and went into a bootloop and heated up. So I took out the battery and tried starting it again by clearing cache and dalvik cache. But it was still stuck at bootloop. After about 3 hours, somehow it came back on its own, but all the data and settings were lost. The downloaded apps were present, but their settings were lost.

Since I would have to again set up all apps, I wanted to try a new rom, Lollipop based. I downloaded the latest RESURRECTION REMIX (5.5.7) apps and downloaded the OpenGapps micro package. But after trying a clean install, the boot loop problem was still there. I tried with a different Gapp package, from OmniRom thread (all were for Android 5.1) but still no help. Even flashing the ROM alone would be of no help. I remembered I had a similar problem after flashing Boeffla kernel and the solution in that case was flashing a new version of the kernal. I tried that also. But no help.

I changed my recovery from CWM to TWRP as someone in some thread mentioned that it could help. But still No avail. In doing a clean rom, I tried almost 3 roms, cleaned cache, system, dalvik cache and even the internal storage and tried all other combinations. BUT THE SAME BOOT LOOP PROBLEM REMAINED.

As a last resort I had to flash the original 4.3 JellyBean firmware hoping that performing a clean install from that would help. But even after that the boot loop remains. Someone please help me flash a Lollipop based rom. This thing is driving me crazy now.