[Xperia Z1 Q&A, Help & Troubleshooting] NgZeng:
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.