[Xperia Z2 Tablet Q&A, Help & Troubleshooting] helmuthsorellana:
this is my log: 18/031/2018 00:31:41 - INFO - Flashtool Version 0.9.24.4 built on 01-02-2018 22:15:00

18/031/2018 00:31:41 - INFO - Searching for a web proxy

18/031/2018 00:31:42 - INFO - No proxy found, using direct connection

18/031/2018 00:31:43 - INFO - Syncing devices from github

18/031/2018 00:31:43 - INFO - Opening devices repository.

18/031/2018 00:31:44 - INFO - Scanning devices folder for changes.

18/032/2018 00:32:03 - INFO - Pulling changes from github.

18/032/2018 00:32:04 - INFO - Devices sync finished.

18/032/2018 00:32:06 - INFO - Loading devices database

18/032/2018 00:32:06 - INFO - Loaded 100 devices

18/032/2018 00:32:06 - INFO - Starting phone detection

18/032/2018 00:32:08 - INFO - Device disconnected

18/032/2018 00:32:32 - INFO - Selected Bundle for Sony Xperia Z2 Tablet(SGP521). FW release : 17.1.1.A.0.402. Customization : CE

18/032/2018 00:32:32 - INFO - Preparing files for flashing

18/033/2018 00:33:54 - INFO - Please connect your device into flashmode.

18/040/2018 00:40:03 - INFO - Using Gordon gate drivers version 3.2.0.0

18/040/2018 00:40:04 - INFO - Opening device for R/W

18/040/2018 00:40:05 - INFO - Device ready for R/W.

18/040/2018 00:40:05 - INFO - Reading device information

18/040/2018 00:40:05 - INFO - Phone ready for flashmode operations.

18/040/2018 00:40:05 - INFO - Opening TA partition 2

18/040/2018 00:40:05 - INFO - Current device : SGP521 - CB512707UY - 1281-8152_R6A - 1278-4804_17.1.1.A.0.402 - GLOBAL-LTE_17.1.1.A.0.402

18/040/2018 00:40:05 - INFO - Closing TA partition

18/040/2018 00:40:05 - INFO - Start Flashing

18/040/2018 00:40:05 - INFO - Processing loader.sin

18/040/2018 00:40:05 - INFO - Checking header

18/040/2018 00:40:05 - INFO - Flashing data

18/040/2018 00:40:06 - INFO - Loader : S1_Root_9c84 - Version : MSM8974AB_12 / Boot version : S1_Boot_MSM8974AB_LA2.0.1_37-B / Bootloader status : ROOTABLE

18/040/2018 00:40:06 - INFO - Max packet size set to 512K

18/040/2018 00:40:06 - INFO - USB buffer size set to 512K

18/040/2018 00:40:11 - INFO - Parsing boot delivery

18/040/2018 00:40:11 - INFO - No flash script found. Using 0.9.18 flash engine

18/040/2018 00:40:11 - INFO - Opening TA partition 2

18/040/2018 00:40:11 - INFO - Writing TA unit 00002774. Value : 01

18/040/2018 00:40:11 - INFO - Closing TA partition

18/040/2018 00:40:11 - INFO - Processing partition-image.sin

18/040/2018 00:40:11 - INFO - Checking header

18/040/2018 00:40:11 - INFO - Flashing data

18/040/2018 00:40:11 - INFO - Phone boot version : S1_Boot_MSM8974AB_LA2.0.1_37-B. Boot delivery version : S1_Boot_MSM8974AB_LA2.0.1_37-B

18/040/2018 00:40:11 - INFO - Boot delivery up to date. Nothing to do

18/040/2018 00:40:11 - INFO - Opening TA partition 2

18/040/2018 00:40:13 - INFO - Closing TA partition

18/040/2018 00:40:13 - INFO - Opening TA partition 2

18/040/2018 00:40:13 - INFO - Processing amss_fsg.sin

18/040/2018 00:40:13 - INFO - Checking header

18/040/2018 00:40:13 - INFO - Flashing data

18/040/2018 00:40:13 - INFO - Processing amss_fs_1.sin

18/040/2018 00:40:13 - INFO - Checking header

18/040/2018 00:40:13 - INFO - Flashing data

18/040/2018 00:40:13 - INFO - Processing amss_fs_2.sin

18/040/2018 00:40:13 - INFO - Checking header

18/040/2018 00:40:13 - INFO - Flashing data

18/040/2018 00:40:13 - INFO - Processing cache.sin

18/040/2018 00:40:13 - INFO - Checking header

18/040/2018 00:40:13 - INFO - Flashing data

18/040/2018 00:40:15 - INFO - Processing fotakernel.sin

18/040/2018 00:40:15 - INFO - Checking header

18/040/2018 00:40:15 - INFO - Flashing data

18/040/2018 00:40:17 - INFO - Processing kernel.sin

18/040/2018 00:40:17 - INFO - Checking header

18/040/2018 00:40:17 - INFO - Flashing data

18/040/2018 00:40:19 - INFO - Closing TA partition

18/040/2018 00:40:19 - INFO - Opening TA partition 2

18/040/2018 00:40:20 - INFO - Processing system.sin

18/040/2018 00:40:20 - INFO - Checking header

18/040/2018 00:40:21 - INFO - Flashing data

18/041/2018 00:41:58 - ERROR - Processing of system.sin finished with errors.

18/041/2018 00:41:58 - INFO - Ending flash session

18/041/2018 00:41:58 - ERROR - The device does not recognize the command.

18/041/2018 00:41:58 - ERROR - Error flashing. Aborted

18/041/2018 00:41:58 - INFO - Flashing finished.

18/041/2018 00:41:58 - INFO - Please unplug and start your phone

18/041/2018 00:41:58 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings

18/042/2018 00:42:01 - INFO - Device disconnected

i have read that some users could fix the sleep of death issue by charging the device for about 4 hours and then to connect your pc to router using ethernet cable, after that they tried to reapir software using xperia companion, I'm gonna try and i'll post results.....