Post [Q] Dell Venue 8 Pro: Asking for help, my tablet crashed when I was updating the bios

I'm from China.My Venue 8 pro was shut down when it was updating the bios.
I bought it from the US, It's hard to send it back to Dell for repair.
It can't be started up now, when I pressed the power botton for 10s, the light will flicker 3 times.
I have no idea right now. How can I repair it?
Please help me.
Thanks a lot.