[Xperia Z Q&A, Help & Troubleshooting] gim`y:
The phone xperia Z c6603 was rooted and it failed by updateing Android 5.1.1 10.7.A.0.228 on Sony Companion. Repair failed too.

Flash tool is failing on fotakernel.sin

I was training to flash the kernel with boot.img - Failed

Device is with - USB debugging off

Wath is the options to bring the phone working again?

05/002/2016 19:02:51 - INFO - Selected Bundle for Sony Xperia Z(C6603). FW release : 10.7.A.0.228. Customization : Customized CE1

05/002/2016 19:02:51 - INFO - Preparing files for flashing

05/003/2016 19:03:00 - INFO - Please connect your device into flashmode.

05/003/2016 19:03:13 - INFO - Device connected in flash mode

05/003/2016 19:03:13 - INFO - Opening device for R/W

05/003/2016 19:03:13 - INFO - Reading device information

05/003/2016 19:03:13 - INFO - Phone ready for flashmode operations.

05/003/2016 19:03:13 - INFO - Opening TA partition 2

05/003/2016 19:03:13 - INFO - Current device : C6603 - BX903JNJXJ - 1270-5695_R2E - 1269-5309_10.6.A.0.454 - GLOBAL-LTE_10.6.A.0.454

05/003/2016 19:03:13 - INFO - Closing TA partition

05/003/2016 19:03:13 - INFO - Start Flashing

05/003/2016 19:03:13 - INFO - Processing loader.sin

05/003/2016 19:03:13 - INFO - Checking header

05/003/2016 19:03:13 - INFO - Flashing data

05/003/2016 19:03:14 - INFO - Loader : S1_Root_5ca3 - Version : APQ8064_39 / Boot version : S1_Boot_Lagan_1.1_10 / Bootloader status : ROOTED

05/003/2016 19:03:14 - INFO - Max packet size set to 512K

05/003/2016 19:03:14 - INFO - USB buffer size set to 512K

05/003/2016 19:03:14 - INFO - Parsing boot delivery

05/003/2016 19:03:14 - INFO - No flash script found. Using 0.9.18 flash engine

05/003/2016 19:03:14 - INFO - Opening TA partition 2

05/003/2016 19:03:14 - INFO - Writing TA unit 00002774. Value : 01

05/003/2016 19:03:14 - INFO - Closing TA partition

05/003/2016 19:03:14 - INFO - Processing partition.sin

05/003/2016 19:03:14 - INFO - Checking header

05/003/2016 19:03:14 - INFO - Flashing data

05/003/2016 19:03:14 - INFO - Phone boot version : S1_Boot_Lagan_1.1_10. Boot delivery version : S1_Boot_Lagan_1.1_10

05/003/2016 19:03:14 - INFO - Boot delivery up to date. Nothing to do

05/003/2016 19:03:14 - INFO - Opening TA partition 2

05/003/2016 19:03:14 - INFO - Closing TA partition

05/003/2016 19:03:14 - INFO - Opening TA partition 2

05/003/2016 19:03:14 - INFO - Processing amss_fs_1.sin

05/003/2016 19:03:14 - INFO - Checking header

05/003/2016 19:03:14 - INFO - Flashing data

05/003/2016 19:03:14 - INFO - Processing amss_fs_2.sin

05/003/2016 19:03:14 - INFO - Checking header

05/003/2016 19:03:14 - INFO - Flashing data

05/003/2016 19:03:14 - INFO - Processing amss_fs_3.sin

05/003/2016 19:03:14 - INFO - Checking header

05/003/2016 19:03:14 - INFO - Flashing data

05/003/2016 19:03:14 - INFO - Processing cache.sin

05/003/2016 19:03:14 - INFO - Checking header

05/003/2016 19:03:14 - INFO - Flashing data

05/003/2016 19:03:16 - INFO - Processing fotakernel.sin

05/003/2016 19:03:16 - INFO - Checking header

05/003/2016 19:03:16 - INFO - Flashing data

05/033/2016 19:33:46 - ERROR - Processing of fotakernel.sin finished with errors.

05/033/2016 19:33:46 - INFO - Ending flash session

05/033/2016 19:33:46 - ERROR - 31 : Ein an das System angeschlossenes Gerät funktioniert nicht.

05/033/2016 19:33:46 - ERROR - Error flashing. Aborted

05/033/2016 19:33:46 - INFO - Flashing finished.

05/033/2016 19:33:46 - INFO - Please unplug and start your phone

05/033/2016 19:33:46 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings

The phone is not starting!