[Sony Cross-Device General] Toledo_JAB:
Please read all of the first post above and then all the instructions FIRST, before trying anything. If you are unsure about anything PLEASE ASK QUESTIONS. No one wants you to damage your phone. So make sure you understand what your doing. If your not sure what your doing you could do more damage to the phone :( And remember with an unlocked bootloader you can do severe damage.
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ATTENTION:

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If your phone is not working but you see a led or have bootloops DO NOT USE HARD-RESET. This can make your phone lock/freeze up until the battery dies. It took 51 hours for mine to die.

However if you get stuck on a boot screen or get bootloops a SOFT-RESET may work to reboot.
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If you have unlocked your bootloader this guide may or may not work for you. If you have trouble recovering then see the "TRICKS that require FASTBOOT-mode" below.​

YOU NEED TO RESET YOUR PHONE!

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If your phone is soft-brick and does nothing when, -the buttons are pressed, -a charger is plugged in, -or if the screen is still ON then....

The memory chips need lose power to clear the bad data and reset the phone. Either by the battery going dead or by unplugging the battery.

You can to leave the phone on a charger to see when the battery dies. Usually the battery will not charge in a soft-brick state and will die while still plugged in. After the reset you should then get the red led. However if you get a red led immediately when first plugged in and no response but red led for a long time, then you may need to leave the phone unplugged and let the battery die.

Only after the chips reset will you get the red led. The RED LED should mean the phone is charging in 'low battery level charge mode'.

Once you get the red led, after the reset, do NOT try to turn on the phone. If you try to start the phone now without fixing the problem you will have to start all over.

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UNPLUGGING THE BATTERY

If you feel like taking your phone apart you can unplug the battery. Most 2012 XPERIA's have a built in battery that is not designed to be easily removed. However next to the battery there should be a ribbon cable with a plug to the mother board. Unplugging this cable for 2-3 minutes should reset your phone without letting the battery die. Read here for the original idea post

CAUTION: this may effect your warranty

CLICK This for a Picture

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The Rubber Band Trick

Here are some links to help describe the rubber band trick.

http://xdaforums.com/showpost.php?p=37562298&postcount=301

http://xdaforums.com/showpost.php?p=37844592&postcount=317

http://xdaforums.com/showpost.php?p=39835850&postcount=527

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Now after the phone has reset and you have the red led.​

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~ keep charging with wall charger. A charger has a higher current rate and should charge faster than a PC.

~ Make flashtool ready to flash your stock.ftf file. If you are experiencing errors while flashing the entire ROM try to flash just the kernel, check off all in the exclude box except kernel. At this point your battery is very low and doing this will make the flash process much faster than trying to flash the entire ROM.

~ Try to connect phone in flash-mode. If your phone has enough battery you will get green led. If the flash fails on the first try, just put it back on the charger and wait about 10-30 minutes and repeat. It may take a while to charge enough to flash.

~ If you see the red led go out, then try for flash-mode.

~ If you get bootloops, try to flash between loops. As soon as you notice loop, hold volume down and plug the phone into PC with FlashTool ready. Once the loop starts you have very little time to flash, before the loops drain the battery. If you can not flash, the battery will have to die and phone reset. Then start over with red led.

~ After you complete the flash, unplug the phone and see what happens. Sometimes it will boot to Sony screen and then shut off by itself, if so plug in to a charger. You should get the red led then the battery charging screen then. After about 20 minutes of red led.

~ If you get a green led (for flash mode) then press the power button until 1 vibration. The green led should flash 1 time. This will end flashmode and start the phone. If you don't end flashmode the phone will still give a green led whenever plugged in, but it will not charge, until the battery dies and the phone resets again.

~ If you were able to flash the entire stock.ftf file and your phone has gone from red led to the charging screen, then your phone should now be recovered and turn on normally.

~ If you could only flash the kernel then you will get bootloops. Again you can unplug and try a hard-reset to turn off the phone. If hard-reset works plug in charger and wait for red led and then charging screen.

~ If you don't do a hard-reset, the phone boot looping should kill the battery and then plug in charger (this is what I did). Then wait for red led and then charging screen.

~ Now you should have a good kernel and the phone plugged in. You should have the charging screen with the battery icon and led for 'off-line charge mode'. Charge until over 50%. A quick press of the power button will bring up the charging screen.

~ Once over 50% then flash the full stock.ftf with a full wipe.

~ If you got this far but still cannot flash a full stock.ftf file then try to use PC Companion software to REPAIR your phone. Make sure battery is more than 50%.

~ If all fails then post a copy of the FlashTool log in this thread.

To save space please use the BB code for HIDE. Example

[HIDE]The text from your log here[/HIDE]

The text from your log here

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If the above steps do not work you can also try the tricks below.​

Due to the amount and length of TRICKS, I have provided links to their post​

TRICK: FOR PHONE THAT WONT RESPOND; {VIEW THIS POST FOR TRICK}; Confirmed working on ION

TRICK: FOR PHONE THAT WONT RESPOND; {VIEW THIS POST FOR TRICK}; Confirmed ION

TRICK: TRY CONNECTING TO PC; {VIEW THIS POST FOR TRICK}

TRICK: IF BOOTLOOPS WHEN PULGGED INTO PC; {VIEW THIS POST FOR TRICK} This should also work for FLASH mode; Confirmed ION

TRICK: FOR PHONE THAT WONT RESPOND; {VIEW THIS POST FOR TRICK}; Confirmed working on Xperia J

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These TRICKS require FASTBOOT access on the phone​

TRICK: FOR KERNEL WITHOUT OFFLINE CHARGING; {VIEW THIS POST FOR TRICK }

TRICK: IF YOU GET INTO FASTBOOT MODE, BLUE LED; {VIEW THIS POST FOR TRICK}; Confirmed ION

TRICK: FOR UNLOCKED BOOTLOADERS; {VIEW THIS POST FOR TRICK}; Confirmed ION

TRICK: IF YOU TRIED A HARD RESET (3 vibrations); {VIEW THIS POST FOR TRICK}

TRICK: TO USE FASTBOOT TO ACCESS FLASHMODE; { VIEW THIS POST FOR TRICK}; Comfirmed S

TRICK: USE FASTBOOT TO FLASH KERNEL; {VIEW THIS POST FOR TRICK}; Confirmed ION

TRICK: FOR UNLOCKED BOOTLOADERS; {VIEW THIS POST FOR TRICK}; Confirmed SOLA​

Please give feedback if any of these work and on what devices, I will update. 272​

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If you think I should add something new, either post it or PM me the content to add. Thanks to all those who help.

Please vote in my POLL. If this thread helped you please guide others here for the same help :D​

LINK FOR FLASHTOOL HELP POST

List of those that have recovered