Or try to directly charge the battery and flash the BIOS if that doesn’t help.
Just read the thread and the instructions (pdf) of Bill Christiansen.
Another option is contact the seller and try to return it for repair.
But in the end it’s call in the game with buying cheap a-lot-of-bang-for-their-bucks tablets (or any other gadgets) directly from China: you don’t get the instant 2 years guarantee with easy return policy.
The big price difference isn’t without any consequences.