[Xperia Z Q&A, Help & Troubleshooting] ro_33k:
Hello,

I tried to update Xperia Z from 10.5.1.A.0.283 to 10.5.1.A.0.292 but I got an error in flashtool and after reboot I`m stuck in a loop. The device only show Sony logo, then a message Update failed... and stop and the Sony logo again. I can connect in flash mode and in fastboot mode but when I try to flash I get the following error below. I spent 2 days readinf and trying to find a post with something to guide me what to do but without any luck. Please help.

05/007/2015 23:07:00 - INFO - Device connected with USB debugging on

05/007/2015 23:07:01 - INFO - Connected device : Sony Xperia Z

05/007/2015 23:07:01 - INFO - Installed version of busybox : N/A

05/007/2015 23:07:01 - INFO - Android version : 4.4.4 / kernel version : 3.4.0-perf-ge2ad053-00925-g7f21499 / Build number : 10.5.1.A.0.283

05/009/2015 23:09:08 - INFO - Selected Bundle for Sony Xperia Z (C6603). FW release : 10.5.1.A.0.292. Customization : RU

05/009/2015 23:09:08 - INFO - Preparing files for flashing

05/009/2015 23:09:33 - INFO - Please connect your device into flashmode.

05/009/2015 23:09:57 - INFO - Device disconnected

05/010/2015 23:10:29 - INFO - Device connected in flash mode

05/010/2015 23:10:29 - INFO - Opening device for R/W

05/010/2015 23:10:29 - INFO - Reading device information

05/010/2015 23:10:29 - INFO - Phone ready for flashmode operations.

05/010/2015 23:10:29 - INFO - Current device : C6603 - BX903G4JEC - 1270-7298_R2D - 1269-5309_10.5.1.A.0.283 - GLOBAL-LTE_10.5.1.A.0.283

05/010/2015 23:10:29 - INFO - Start Flashing

05/010/2015 23:10:29 - INFO - Processing loader.sin

05/010/2015 23:10:29 - INFO - Checking header

05/010/2015 23:10:29 - INFO - Flashing data

05/010/2015 23:10:29 - INFO - Processing of loader.sin finished.

05/010/2015 23:10:29 - INFO - Loader : S1_Root_5ca3 - Version : APQ8064_39 / Boot version : S1_Boot_Lagan_1.0_2 / Bootloader status : ROOTABLE

05/010/2015 23:10:30 - INFO - Processing partition-image.sin

05/010/2015 23:10:30 - INFO - Checking header

05/010/2015 23:10:30 - INFO - Flashing data

05/010/2015 23:10:30 - INFO - Processing of partition-image.sin finished.

05/010/2015 23:10:30 - INFO - Parsing boot delivery

05/010/2015 23:10:30 - INFO - Phone boot version : S1_Boot_Lagan_1.0_2. Boot delivery version : S1_Boot_Lagan_1.1.1_1

05/010/2015 23:10:30 - INFO - Going to flash boot delivery

05/010/2015 23:10:30 - INFO - Processing emmc_appsboot_S1_Boot_Lagan_1.1.1_1_HWID_7190E1_OEM0.sin

05/010/2015 23:10:30 - INFO - Checking header

05/010/2015 23:10:30 - ERROR - Processing of emmc_appsboot_S1_Boot_Lagan_1.1.1_1_HWID_7190E1_OEM0.sin finished with errors.

05/010/2015 23:10:30 - INFO - Ending flash session

05/010/2015 23:10:30 - ERROR - ERR_SEVERITY="MINOR";ERR_CODE="0017";ERR_DYNAMIC="0x80080021 ";

05/010/2015 23:10:30 - ERROR - Error flashing. Aborted

05/010/2015 23:10:30 - INFO - Device connected in flash mode

05/010/2015 23:10:31 - INFO - Device disconnected

I managed to flash a stock firmware (excluding bootbundle) and now I`m back to the initial problem. Device starts only when is connected to wallcharger and without it device stops apparently without any reason when even when the battery is above 90%. First it loose signal then reboot and loop with Sony logo. If I plug in the wallcharger it starts normally and all functions seems to be OK.