I have a similar issue with my tablet, but my screen is pitch black and touch is working. According to the forums a flex cable has gotten lose during the transport, might be a similar issue for you but a different flex cable?
I received mine today from Banggood – screen not working. When I plug it in to an external monitor the touch works fine, but the screen is pitch black. Trying to find a solution for this now, I hope you’ll receive a working unit.