Bricked Xperia S LT26i

I was in the process of updating to android 6, i had formatted everything and converted to f2fs partition but i made an error and sd card storage was missing so i converted back to ext4 and was going to flash the stock rom to reset partition tables upon reset i tried to get into flashmode to use flashtool but im not getting any leds

The phone is also no longer turning on or booting into recovery however when i plug in the usb cable it detects it

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