How to repair Lumia Phones boot with ATF JTAG?

I just bought ATF NITRO and have activeted ATF JTAG on it,

please somebody tell me step by step on how to repair

dead boot of these lumia models below, because I flashed

them with Infinity Best and all of them died and could not even

detected on the pc again.



Thanks.



LUMIA 620 (RM-846)

LUMIA 520 (RM-914)

LUMIA 710 (RM-803)

LUMIA 710.1 (RM-809)

via Welcome to gsm-tips http://forum.gsmhosting.com/vbb/f609/how-repair-lumia-phones-boot-atf-jtag-1745658/