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[Q] Device bricked - Not booting after attempt at downgrading

27th January 2014, 01:42 AM |#1  
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After upgrading to 4.4 beanstalk tried to downgrade by installing FTF of 4.3 ROM. Ever since all I can do is get into FlashMode and FastBoot (using Flashtool), and am able to install FTFs and fastboot boot.img, but the device never turns on (and doesn't vibrate when I press the power button). Tried unlocking, re-locking, running Sony's Update (but it says the software is incompatible so it won't upgrade), different FTFs and BOOT.IMGs.

All I want is to get back to a locked, official ROM.

Help!
 
 
27th January 2014, 02:37 AM |#2  
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Quote:
Originally Posted by sitelister

After upgrading to 4.4 beanstalk tried to downgrade by installing FTF of 4.3 ROM. Ever since all I can do is get into FlashMode and FastBoot (using Flashtool), and am able to install FTFs and fastboot boot.img, but the device never turns on (and doesn't vibrate when I press the power button). Tried unlocking, re-locking, running Sony's Update (but it says the software is incompatible so it won't upgrade), different FTFs and BOOT.IMGs.

All I want is to get back to a locked, official ROM.

Help!

While flashing ftf have u wiped data,appslog,cache


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27th January 2014, 03:42 AM |#3  
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Quote:
Originally Posted by vikash1994b

While flashing ftf have u wiped data,appslog,cache

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Yes
27th January 2014, 05:45 AM |#4  
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Quote:
Originally Posted by sitelister

Yes

Have you tried charging..your battery may have died.

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---------- Post added at 11:15 AM ---------- Previous post was at 11:13 AM ----------

Bcoz yesterday i succesfully flash stock on cm11 bt i flashed 4.2.2 so that i can root it

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28th January 2014, 12:39 AM |#5  
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Yeah - battery is charged (to the best of my knowledge) - connected all day to the USB.
28th January 2014, 09:36 AM |#6  
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Have you tried Sony's flashtools?

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28th January 2014, 12:27 PM |#7  
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Try to flash the latest firmware using flashtool
28th January 2014, 05:13 PM |#8  
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which flashtool are you using?
31st January 2014, 02:49 AM |#9  
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Flashtools state that the version of the software can't be upgraded (it was a custom KitKat rom). Also tried the most up-to-date flashtool that I could find (0.9.13.0).
Is the downgrade from 4.4 even possible? Is there an order in which I should be installing using FlashTool?
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