[XJ]Hard Brick & Flashtool not working topic

Hi! Yesterday I tried to restore my Xperia J to .31 fw from Seraphic Season 7 because I got some problem with this ROM...
When I tried to restore, flashtool has stalled at "Flashing loader.sin finished" and no longer went on for half an hour so I unplugged the device and tried to turn it on but remained in bootloop... What can I do to restore my device? Can I unbrick it? :crying:
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