[Xperia Z Q&A, Help & Troubleshooting] michnunu:
Thank you again for the suggestion! I appreciate your efforts so much! However, I'm afraid the result is the same. :(

After the phone boots, this notice comes up: "Process system is not responding. Would you like to close it? Wait/OK"

Then it freezes and shuts off. The continuous boot isn't as immediate! Hooray! But it still does not go beyond the lock page before it freezes/glitches and shuts down.

The screen after the lock screen and before it freezes: i58.tinypic.com/spgpzd.png

The Log:

01/029/2014 02:29:26 - INFO - <- This level is successfully initialized

01/029/2014 02:29:26 - INFO - Flashtool Version 0.9.16.0 built on 19-04-2014 19:00:00

01/029/2014 02:29:27 - INFO - Checking if changes have been made to devices folder.

01/029/2014 02:29:40 - INFO - Pulling changes from github

01/029/2014 02:29:43 - INFO - Devices sync finished.

01/029/2014 02:29:51 - INFO - Device disconnected

01/034/2014 02:34:07 - INFO - Selected Bundle for Sony Xperia Z (C6603). FW release : 10.4.1.B.0.101. Customization : Generic UK

01/034/2014 02:34:07 - INFO - Preparing files for flashing

01/036/2014 02:36:41 - INFO - Please connect your device into flashmode.

01/036/2014 02:36:52 - INFO - Device connected in flash mode

01/036/2014 02:36:52 - INFO - Opening device for R/W

01/036/2014 02:36:53 - INFO - Reading device information

01/036/2014 02:36:53 - INFO - Phone ready for flashmode operations.

01/036/2014 02:36:53 - INFO - Current device : C6603 - BX903HYF31 - 1270-7298_R2B - 1269-5309_10.3.1.A.2.67 - GLOBAL-LTE_10.3.1.A.2.67

01/036/2014 02:36:53 - INFO - Start Flashing

01/036/2014 02:36:53 - INFO - Processing loader.sin

01/036/2014 02:36:53 - INFO - Checking header

01/036/2014 02:36:53 - INFO - Flashing data

01/036/2014 02:36:54 - INFO - Processing of loader.sin finished.

01/036/2014 02:36:54 - INFO - Loader : S1_Root_5ca3 - Version : APQ8064_30 / Boot version : S1_Boot_Lagan_1.1.1_1 / Bootloader status : NOT_ROOTABLE

01/036/2014 02:36:54 - INFO - Processing partition-image.sin

01/036/2014 02:36:54 - INFO - Checking header

01/036/2014 02:36:54 - INFO - Flashing data

01/036/2014 02:36:54 - INFO - Processing of partition-image.sin finished.

01/036/2014 02:36:54 - INFO - No bootdelivery to send

01/036/2014 02:36:54 - INFO - Processing kernel.sin

01/036/2014 02:36:54 - INFO - Checking header

01/036/2014 02:36:54 - INFO - Flashing data

01/036/2014 02:36:56 - INFO - Processing of kernel.sin finished.

01/036/2014 02:36:56 - INFO - Processing rpm.sin

01/036/2014 02:36:56 - INFO - Checking header

01/036/2014 02:36:56 - INFO - Flashing data

01/036/2014 02:36:56 - INFO - Processing of rpm.sin finished.

01/036/2014 02:36:56 - INFO - Processing fotakernel.sin

01/036/2014 02:36:56 - INFO - Checking header

01/036/2014 02:36:56 - INFO - Flashing data

01/036/2014 02:36:58 - INFO - Processing of fotakernel.sin finished.

01/036/2014 02:36:58 - INFO - Processing amss_fs_3.sin

01/036/2014 02:36:58 - INFO - Checking header

01/036/2014 02:36:58 - INFO - Flashing data

01/036/2014 02:36:58 - INFO - Processing of amss_fs_3.sin finished.

01/036/2014 02:36:58 - INFO - Processing amss_fs_2.sin

01/036/2014 02:36:58 - INFO - Checking header

01/036/2014 02:36:58 - INFO - Flashing data

01/036/2014 02:36:58 - INFO - Processing of amss_fs_2.sin finished.

01/036/2014 02:36:58 - INFO - Processing amss_fs_1.sin

01/036/2014 02:36:58 - INFO - Checking header

01/036/2014 02:36:58 - INFO - Flashing data

01/036/2014 02:36:58 - INFO - Processing of amss_fs_1.sin finished.

01/036/2014 02:36:58 - INFO - Processing apps_log.sin

01/036/2014 02:36:58 - INFO - Checking header

01/036/2014 02:36:58 - INFO - Flashing data

01/036/2014 02:36:58 - INFO - Processing of apps_log.sin finished.

01/036/2014 02:36:58 - INFO - Processing cache.sin

01/036/2014 02:36:58 - INFO - Checking header

01/036/2014 02:36:58 - INFO - Flashing data

01/037/2014 02:37:00 - INFO - Processing of cache.sin finished.

01/037/2014 02:37:00 - INFO - Processing system.sin

01/037/2014 02:37:00 - INFO - Checking header

01/037/2014 02:37:00 - INFO - Flashing data

01/040/2014 02:40:02 - INFO - Processing of system.sin finished.

01/040/2014 02:40:02 - INFO - Processing userdata.sin

01/040/2014 02:40:02 - INFO - Checking header

01/040/2014 02:40:02 - INFO - Flashing data

01/040/2014 02:40:24 - INFO - Processing of userdata.sin finished.

01/040/2014 02:40:24 - INFO - Processing elabel-C6603-row_201310171741.1_10.4.1.B.0.101.sin

01/040/2014 02:40:24 - INFO - Checking header

01/040/2014 02:40:24 - INFO - Flashing data

01/040/2014 02:40:27 - INFO - Processing of elabel-C6603-row_201310171741.1_10.4.1.B.0.101.sin finished.

01/040/2014 02:40:27 - INFO - Ending flash session

01/040/2014 02:40:27 - INFO - Flashing finished.

01/040/2014 02:40:27 - INFO - Please unplug and start your phone

01/040/2014 02:40:27 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings

01/040/2014 02:40:27 - INFO - Device connected in flash mode

01/041/2014 02:41:05 - INFO - Device disconnected