Help, my tablet is dead (yoga 2 10" 1050L) topic

Please help me, my tablet is dead

I have yoga 2 10" 4G 1050L

I tried to flash a ROM but flash failed at 66% and my tablet is dead and I don't know how to fix it.

When I power it on, I can see the first screen (lenovo logo) and then nothing (black screen).

Can anyone help me?