Default [Q] neo v black screen just only vibrate

Hello peeps

I have rooted neo v with unlocked bootloader
I flashed with some jelly bean and kk roms.

I dont know how my phone is completly dead now
I flashed stock ttf from flash tool. In the last flash completed and phone conected with usb denugging off in pc.

( how do i turn on usb debugging in dead phone)

But when i turn on phone it just vibrate and nothing appear on screen. Screen keeps always black. Some time when i press volume key it give me sound.
Flash mode and fastboot mode working.

Pls help me friends.