mobile

I tried to downgrade from Kitkat to JB via flashtool this morning which I often successfully flashed with the same method. But while the flashing is going on and almost finish the flashing (system.img, userdata.img, etc. are already flashed), there seems to be some problem and popped out that the flashing is fail. And then the device does not boot up. While I tried to reconnect the device to PC, the PC cannot recognize the device as shown in the picture. Unable to process any further method. Does anyone in this forum knows how to recover the bricked device like this?

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