did you last use it with windows or android? If you were on windows, the driver update is the likely culprit. You have two options, send it back to the seller for a warranty repair, or buy a few cheap tools and follow Bill’s guide to repairing it yourself. http://techtablets.com/forum/topic/bricked-trying-bios-update/page/3/#post-39877
Once you open it up, you void the warranty, so choose wisely.