Please Help. usb debugging disable and can not boot - Xperia Z2 Q&A, Help & Troubleshooting

Hi. My D6503 device shuted down suddenly and try to open you see writing up SONY down XPERIA on screen and does not go forward. i did this things:
1) i did hard reset. (volume down+power and volume up+power and push the red button until 3 times vibration)
2)i installed pc companion and used.
3) i used flashtool to flash orginal firmware to device but when it is flushing there is writing "reading device information" and does not go forward.
i think that every thing, every details is right that i did about this 3 solution. but it is not fixed.
i am not sure my device usb debuggin is enabled and is unlocked bootloader. i could not learn that because device does not open.
i have no idea how can fix that. i read a lot of things about that but i could not find. can you help me please? thanks

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Please post log in flashtool when your plug in your device to pc
Sent from my D2105 using Tapatalk

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14/006/2016 16:06:39 - INFO - Flashtool Version 0.9.19.8 built on 24-09-2015 22:00:00
14/006/2016 16:06:39 - INFO - Executing search strategies to find proxy selector
14/006/2016 16:06:40 - INFO - No proxy found for IE. Trying next one
14/006/2016 16:06:40 - INFO - Strategy firefox failed trying next one : No Firefox installation found
14/006/2016 16:06:40 - INFO - No proxy found for java. Trying next one
14/006/2016 16:06:40 - INFO - Syncing devices from github
14/006/2016 16:06:40 - INFO - Scanning devices folder for changes.
14/006/2016 16:06:49 - INFO - Pulling changes from github.
14/006/2016 16:06:49 - INFO - Devices sync finished.
14/006/2016 16:06:54 - INFO - Device disconnected
14/007/2016 16:07:10 - INFO - Selected Bundle for Sony Xperia Z2 (D6503). FW release : 23.4.A.1.232_R5C. Customization : Central Europe 3 Generic_1281-8385
14/007/2016 16:07:10 - INFO - Preparing files for flashing
14/010/2016 16:10:27 - INFO - Please connect your device into flashmode.
14/011/2016 16:11:01 - INFO - Device connected in flash mode
14/011/2016 16:11:02 - INFO - Device connected in flash mode
14/011/2016 16:11:02 - INFO - Opening device for R/W
14/011/2016 16:11:02 - INFO - Reading device information

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Did you use original cable from sony ?
Or maybe you have a bad cable ..
Or try to flash preroot frimware via twrp recovery then do factory reset
Sent from my D2105 using Tapatalk

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i waited for 1-2 hours after the writing "reading device information" but nothings happen.
i also installed the Emma but when i try to connect Emma (turned of +volume down+usb plug in) i can not connect, nothings happen.
i installed drivers into drivers folder after flashtool was installed and when i attach the device (turn off, volume down) with usb to computer it was defined "SOMC Flash Device" below the device manager.

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i used original cable but after your post i tried another cable unfortunately does not work. i searched how can i flash pre rooted firmware , i realized that you have to install twrp. but i can not find how is it install with flashtool. could you help me how can i install twrp with flashtool?

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mgurer said:
i used original cable but after your post i tried another cable unfortunately does not work. i searched how can i flash pre rooted firmware , i realized that you have to install twrp. but i can not find how is it install with flashtool. could you help me how can i install twrp with flashtool?
Click to expand...
Click to collapse
Download latest androplus kernel, unpack the boot.img, then just flash the boot.img though flashtool via fastboot mode, to boot to recovery, turn on your device and when the led turn on, pres volume down and that's your twrp ..
Sent from my D2105 using Tapatalk

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i downloaded last version Z2_AndroPlusKernel_v57a and flashed but it is failed. (remote: command not allowed) you can see log.
14/038/2016 20:38:14 - INFO - Device disconnected
14/038/2016 20:38:28 - INFO - Device connected in fastboot mode
14/038/2016 20:38:47 - INFO - Now plug your device in Fastboot Mode
14/039/2016 20:39:04 - INFO - Selected kernel (boot.img or kernel.sin): C:\Users\muratgurer\Desktop\boot.img
14/039/2016 20:39:04 - INFO - Flashing selected kernel
14/039/2016 20:39:05 - INFO - sending 'boot' (16342 KB)...
14/039/2016 20:39:05 - INFO - OKAY [ 0.636s]
14/039/2016 20:39:05 - INFO - writing 'boot'...
14/039/2016 20:39:05 - INFO - FAILED (remote: Command not allowed)
14/039/2016 20:39:05 - INFO - finished. total time: 0.638s
14/039/2016 20:39:05 - INFO - FASTBOOT Output:
sending 'boot' (16342 KB)...
OKAY [ 0.636s]
writing 'boot'...
FAILED (remote: Command not allowed)
finished. total time: 0.638s
14/039/2016 20:39:05 - INFO - Please check the log before rebooting into system

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The lastest androplus kernel is v71, but that's okay .. Maybe that's error caused by your computer have two fastboot binary, one in flashtool, and one in other tool (example in minimal adb fastboot tool), if your machine have more than one fastboot, you can't use the fastboot to flash anything
Sent from my D2105 using Tapatalk

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i used another pc today and i just installed only flashtool not another program and i installed drivers into flashtool. i did eveything from the beginning and the same result i have. also flushing kernel. i guess usb debugging is disable so i can not do anything.
i can not lock bootloader because of usb debugging is disable. i can not flash the kernel because of bootloader locked.
if usb debugging is disable how can i recover?