Unhappy [Q] off during upgrading my Rockchip 3066 :( RkandroidTool

Recently i used RKAndroidTool.
And upgrading rom/kernel but during this process my android tablet turn off and now still off
Am tring many times on from, power switch
but did not on
I have versus touchtab 7dc. in Rock-chip 3066.
1gb ram.
400 gpu.
16gb internal memory.
7 inch ips screen.